do we have options? can't help without options.
Mechanical harvesters have increasingly replaced human labor in agriculture due to factors like labor shortages and the drive to reduce costs and increase efficiency. This is part of a larger trend in mechanization driven by technological advancements and environmental considerations, as machinery becomes more capable of performing complex tasks and reducing waste.
Mechanical harvesters have replaced hand labor in many agricultural fields, signaling a major shift in how agriculture is approached. The introduction of mechanization in farming practices has allowed for significant advancements in productivity and efficiency. In regions like California, farmers are investing in sophisticated machinery capable of handling even delicate tasks such as fruit harvesting that were previously done by hand. This transition is driven by various factors, including labor shortages caused by changes in migration patterns and economic conditions, as well as the inherent capitalist motivation to reduce costs and improve profits.
The evolution of agriculture has often been in step with technological advancements. Large-scale, efficient farm machinery like tractors, cultivators, and combine harvesters have replaced many manual farming activities, drastically reducing the number of people required to operate a farm. Over time, the need for human labor on farms has decreased, particularly in high-income countries such as the United States. However, as labor costs rise, so does the incentive to automate, which underscores the capitalist drive to innovate and maximize profit margins.
In addition to labor-saving motivations, environmental concerns also play a role in agricultural mechanization. The use of fossil fuels has led to an increase in greenhouse gas emissions, and there is a growing focus on renewable energy sources and more efficient use of biomass. The farm equipment manufacturing industry has evolved accordingly, producing machines that not only harvest crops but also manage post-harvest handling, aiming to exploit every part of the crop and minimize waste.
An organism with five pairs of chromosomes can have___ genetic possibilities from independent assortment of its single gamete
Answer:
The answer is 32.
Answer:
An organism with five pairs of chromosomes can have 32 genetic possibilities from independent assortment of its single gamete
Explanation:
An organism with five pairs of chromosomes can have 32 genetic possibilities from a variety independent of its single gamete.
To achieve this result, you just have to do a very simple calculation using formula 2ⁿ. In this formula, the number 2 indicates the number of possible gamete combinations, while the letter "n" indicates the number of haploid chromosomes the individual has. Thus, for the individual exposed in the above question, the letter "n" would be replaced by the number 5, indicating that: 2⁵ = 2x2x2x2x2 = 32.
An organism takes care of its young and produces few offspring. What type of organism is this?
A. K-strategist B. R-strategist C. L-strategist D. S-strategist
Answer:
K-strategists
Explanation:
Reproductive pattern in organisms can be typically categorised into two:
1. K- Strategy
2. R- Strategy
K-strategists are organisms that lives in very stable environments and gives birth to fewer organisms. Most of these organisms reproduce close the carrying capacity of their habitat. They offer support and protection to their progeny to the points where they become indepedent. The mortality rate is very low in such organisms and so is the birth rate too.
R-strategists are organisms whose main aim is to populate and dominate an environment. They reproduce exponentially and offers no life support to their progeny in their early developmental stage. They often occupy unstable and highly unpredictable environments. Most R organisms have a very low and short life expectancy. Since they produce more offspring and they live under adverse environments, mortality rate is high.
Examples of K-strategists are elephants and man
Examples of R-stategists are grasses and microbes.
Answer:
A
Explanation:
To Pea plants with yellow peas are crossed. Most of their offspring have yellow peas, but about 25% of the offspring have green peas. For Pea color, yellow is a dominant trait and green is the recessive trait. What does this tell you about the two parent plants?
A. The parent plants have only dominant alleles for pea color.
B. The parent plants are homozygous for pea color.
C. The parent plants are heterozygous for pea color.
D. Pea color follows an incomplete dominance pattern of inheritance.
Answer:
b
Explanation:
The two parent pea plants are likely heterozygous for the pea color trait, meaning they each carry one dominant (yellow) and one recessive (green) allele. This would account for the observed offspring pea color ratios. So, the correct option is C.
Explanation:The information given in the question suggests that the parent pea plants are both heterozygous for the pea color trait. This means that they each carry two different alleles for the pea color gene - one dominant (yellow) and one recessive (green). When they reproduce, each parent plant contributes one of these alleles to their offspring, resulting in an approximately 3:1 ratio of yellow to green peas in the offspring. This is a characteristic outcome of a Punnett square for parents that are heterozygous for a particular trait.
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16. What's developed as a result of the electron transport chain?
Answer:
Electrochemical proton gradient
Explanation:
As electrons are passed from one protein complex to another in the mitochondria, the tapped energy is used to pump protons to the intermembrane space between the inner and outer mitochondrial membrane. This creates a proton motive forces whose potential is harnessed by the ATP synthase to phosphorylate ADP to ATP (the cell energy molecule).
Answer:
The electron transport chain reaction occurs in the cristae of the mitochondria.
what is the next step in muscle contraction after the actin changes shape?
Answer:
The myosin filament or more precisely the myosin head can now bind to the actin forming the cross bridges followed by a power stroke during which actin slides over myosin.
Explanation:
The muscle contraction can be explained by sliding filament theory bu Huxley and Huxley. The two muscle proteins which take part in muscle contraction are myosin and actin.
Myosin: It is a hexameric protein. Each monomer is called meromyosin. Each meromyosin has two important parts, a globular head with a short arm and a tail. The head forms cross bridges with the actin filament. Myosin head acts as ATPase enzyme. When ATP binds, head acts as enzyme hydrolyzing the ATP to produce energy. The head also has the site for binding of actin.
Actin filament: It contains three proteins, filamentous actin, tropomyosin and troponin. Filamentous actin contains active site for myosin binding but at rest, tropmyosin covers the myosin binding site. This prevents the cross bridge formation. Tropomyosin are held in place by troponin molecules.
When calcium is available, the binding of calcium to a TpC sub-unit of troponin causes the shifting of tropomyosin-troponin complex. Now actin can attach to myosin head and slide over myosin.
The actin filaments slide over the myosin filament by the the formation of cross bridges and during this process the I-band gets reduced whereas the A band remain the same. The lengths of actin and myosin filaments remain unchanged.
Answer:
actin changes shape
Explanation:
ap ex
If you need to understand how food chains are connected in the ecosystem, which tool would you use? A. Food chain B. Phylogenetic tree C. Food web D. Periodic table
Answer: C food web
Explanation:
Food web is a system that interlock and interdependent food chain
Answer:
C. Food Web
Explanation:
A food web is the network of interconnected food chains. It represents the branched food chains wherein one plant species serve as food for many different primary consumers and one specific primary consumer feeds on various plant species. This leads to interconnected network of food chains and is called as food web.
what are the different types and rates of evolution?
Answer:
divergent, convergent, and parallel evolution.
Explanation:
Factors such as environment and predation pressures can have different effects on the ways in which species exposed to them evolve. Not sure about rates. hope this can help.
How are peptide bonds formed between amino acids in the elongation process of the translation of mRNA?
In translation elongation, peptide bonds are formed between amino acids via the catalytic action of peptidyl transferase. This ribozyme facilitates bond formation between the amino group of the amino acid on the A-site tRNA and the carboxyl group of the amino acid on the P-site tRNA, using GTP for energy. The tRNA carrying the growing peptide moves from the A-site to the P-site, while the empty tRNA exits through the E-site.
The elongation process of the translation of mRNA is a critical phase in protein synthesis, during which peptide bonds are formed between amino acids. As tRNAs bring individual amino acids to the ribosome, the ribosome's movement from the A to the P to the E site is facilitated by conformational changes that move the ribosome along the mRNA strand.
The high-energy bond of each charge aminoacyl-tRNA is used when forming the peptide bond catalyzed by an RNA-based enzyme known as peptidyl transferase. This enzyme is a component of the 50S ribosomal subunit.
The process begins with the formation of a bond between the amino group of the amino acid on the A-site tRNA and the carboxyl group of the amino acid on the P-site tRNA. Via GTP hydrolysis, energy is provided to both the binding of the new aminoacyl-tRNA to the A-site and its subsequent translocation to the P-site following peptide bond formation.
After a peptide bond is formed, the tRNA that now carries the growing peptide chain moves from the A-site to the P-site. Concurrently, the P-site tRNA, which is now empty, moves to the E-site where it is then expelled, allowing the cycle to repeat and the polypeptide chain to elongate.
what is responsible for producing energy in both plant and animal cells
The mitochondria in both plant and animal cells is responsible for producing energy. They make ATP, the cell's main energy-carrying molecule, through a process called cellular respiration. Ensuring both plants and animals have a system to effectively convert nutrients into usable energy.
Explanation:The mitochondria are responsible for producing energy in both plant and animal cells. They are often referred to as the 'powerhouses' or 'energy factories' of a cell. This is because they make adenosine triphosphate (ATP), the cell's main energy-carrying molecule which represents the cell's short-term stored energy.
Cellular respiration is the process of making ATP using the chemical energy found in glucose and other nutrients. Within the mitochondria, this process uses oxygen and produces carbon dioxide as a waste product, which we exhale with every breath.
In plants, they also have chloroplasts that perform photosynthesis to convert solar energy into chemical energy, then this energy is broken down in mitochondria similar to the process in animals. This clearly shows the interplay and importance of both photosynthesis and respiration in plant cells, and the central role that mitochondria play in both animal and plant cells for energy production.
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Which of the following is not a type of variable in a scientific experiment? A. Independent B. Control C. Dependent D. Observation
Answer: The answer is the D. "Observation" is not a variable in an experiment.
Explanation: Research variables are factors that can be manipulated, measured or those that we try to explain through other variables. "Observation" is not a variable in an experiment, but it is the first step and fundamental part in the scientific method, in which the experiments are contained (experimentation stage). Observation is the information recorded during an experiment, obtained through the senses or through the registration of information on scientific instruments.
Observation is not a type of variable in a scientific experiment.
When performing an experiment, we can identify three kinds of variables:
Dependent variableIndependent variableControl variableA dependent variable is the one we will be focused on during the experiment, it is what we will be measuring. An independent variable is one that will not change in response to other variables in the experiment, it is not affected by the others and is often changed. Lastly, a control variable is any variable that we keep the same throughout the experiment. Since these are the only 3 variables in an experiment, we can say that only option D is correct, it is not a type of variable.
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3 things your body does everyday which require energy
Our bodies use energy daily for essential functions such as breathing, maintaining basal metabolic rates (BMR), and cellular activities, which involve both minor muscle movements and major physical exertions. These activities highlight the importance of adequate nutrient intake to support energy production for bodily functions.
Explanation:Every day, our bodies perform numerous tasks that require energy, illustrating the fundamental biological principle that all living things need resources and energy to carry out life processes. Here are three critical activities:
Breathing: The respiratory system works continuously to supply oxygen to the cells for cellular respiration, a process that converts oxygen and glucose into energy (ATP), carbon dioxide, and water. This energy is vital for maintaining bodily functions and activities.Maintaining Basal Metabolic Rate (BMR): A significant portion of the energy derived from food is used to sustain the BMR, which includes essential functions like body heat regulation, heart rate, blood circulation, and functioning of organs like the liver and brain. Notably, the liver consumes 27% of BMR energy, while the brain uses 19%.Cellular Activities and Muscle Movements: Energy is utilized not only for heavy physical activities but also for minor muscle movements associated with sleeping or gesticulations. Moreover, energy is critical for maintaining electrical potentials in nerve cells, crucial for nerve impulses, and supporting chemical processes in organs such as the kidneys and liver.These activities underscore the importance of a balanced diet rich in nutrients that can be converted into ATP, the cellular energy needed for our bodies to function efficiently.
Which organelle, other than the cell wall, also plays a vital role in providing rigidity to plant cells?
Answer:
The correct answer is option (c). central vacuole.
Explanation:
The central vacuole is an organelle, which is important for maintaining the turgidity in the plant cell. The central vacuole stores water, minerals, salts and helps the cell to maintain the osmorality.
The central vacuole stores a lot of water in the cell, and swell up due to high water concentration, this provide the turgidity to the plant cell and keep intact with the cell wall.
Final answer:
Other than the cell wall, the large central vacuole is essential in providing rigidity to plant cells through turgor pressure. The cell wall itself is made of cellulose, other polysaccharides, and protein, and it's this structure that gives raw vegetables their crunch.
Explanation:
Aside from the cell wall which provides rigidity to plant cells, another critical organelle is the large central vacuole. Found within plant cells, the central vacuole acts as storage for water and other substances. When filled with water, the vacuole exerts an internal pressure called turgor pressure, which reinforces the cell's rigidity. This pressure helps maintain the plant's structural integrity, enabling it to stand upright and resist wilting.
Furthermore, it's interesting to note that besides cellulose, the cell wall also contains other polysaccharides and protein. It not only gives structural support and protection but also has pores that allow the movement of water and nutrients into and out of the cell. The cell wall's sturdy nature is evident when biting into raw vegetables, such as celery, where the crunch is the result of tearing through the rigid cell walls.
Help! Give an example of two other body systems that work together, and explain how they support each other.
Answer:
A good example is pulmonary system and the circulatory system.
The body needs oxygen. The respiratory system is where we get the oxygen supply. When it enters our lungs, how does it go around? This is where the circulatory system comes in. When blood enters our lungs, it picks up the oxygen we need. The primary function of the blood is to distribute nutrients, hormones, and Oxygen to the other cells of the body. Another important function of blood is to remove wastes from the cell like carbon dioxide. The carbon dioxide is brought to the lungs which we will expel when we exhale.
Answer: You could put the pulmonary system and the circulatory system.
Explanation:
(Im in 6th grade it might not be correct sorry)
what color light would most likely be present at 200 meters below sea level
and why
Answer: Sunlight entering the water may travel about 1,000 meters (3,280 feet) into the ocean under the right conditions, but there is rarely any significant light beyond 200 meters (656 feet).
The ocean is divided into three zones based on depth and light level. The upper 200 meters (656 feet) of the ocean is called the euphotic, or "sunlight," zone. This zone contains the vast majority of commercial fisheries and is home to many protected marine mammals and sea turtles.
Only a small amount of light penetrates beyond this depth.
The zone between 200 meters (656 feet) and 1,000 meters (3,280 feet) is usually referred to as the “twilight” zone, but is officially the dysphotic zone. In this zone, the intensity of light rapidly dissipates as depth increases. Such a minuscule amount of light penetrates beyond a depth of 200 meters that photosynthesis is no longer possible.
The aphotic, or “midnight,” zone exists in depths below 1,000 meters (3,280 feet). Sunlight does not penetrate to these depths and the zone is bathed in darkness.
‘Photic’ is a derivative of ‘photon,’ the word for a particle of light.
At 200 measures below ocean position, blue light is most likely to be present due to the immersion characteristics of water which allow blue and green wavelengths to access deeper, with blue light scattering by water motes.
At 200 measures below ocean position, blue light would most probably be present. This is due to the immersion characteristics of water, where different wavelengths of light are downgraded at different rates. Water absorbs the longer wavelengths like red first in the upper 10 m, orange by about 40 m, and unheroic before 100 m, leaving the shorter wavelengths like blue and green to access further. The depth of 200 measures is within the dysphotic zone, also known as the twilight zone, where there's veritably little light, and it doesn't support photosynthesis. Since the photic zone extends to the upper 200 m, and blue light penetrates the deepest, it's the only color that can be perceived at this depth under natural conditions without artificial illumination. The clear water of the open ocean allows blue light to access deeply and be scattered by water motes, further buttressing the dominance of blue at lesser depths.
In which layer does mantle convection occur?
Answer:
The correct answer is asthenosphere.
Explanation:
The Earth comprises four layers, that is, the crust, the mantle, the inner core, and the outer core. The magnetic field of the Earth is the amalgamation of the convection it attains from the Coriolis Effect and the outer core. The layer of the Earth where convection of the mantle takes place is the asthenosphere.
Answer:
(ANSWER): ASTHENOPHERE
Explanation:
Glacial erosion creates a number of landscape features. A low point along an arête that acts as a pass between glacial valleys is known as a/an A. esker. B. col. C. drumlin. D. horn.
Answer:
A low point along an arete that acts as a pass between glacial valleys is a B. Col
Explanation:
Answer:
B. col.
Explanation:
A col is the lowest point (or dip) along an arête (a narrow ridge between two valleys), which serves as a pass from one side of a mountain range or ridge to another. A col is usually found between mountain peaks in a summit line, typically on a prominent ridge or arête. A col may also be referred to as a notch or a gap. An example of a col is the Indira Col on the Indira Ridge in Siachen Muztagh in the Karakoram Range.
True or false
the closer the gene sequence matches between species, the less related they are and the further back in time you will find a common ancestor?
False. The closer the matching percentage is the earlier you will find a common ancestor.
List at least two differences between body cells and sex cells.
-Gametes (sex cells) go through meiosis while body cells go through mitosis
-Also body cells make up the body of any kind of multicellular organisms and gametes are either sperm or eggs
I hope this kinda helped
The differences between somatic cells and gametes lie in their chromosome count and cellular functions.
Somatic cells and gametes differ in their chromosome count and types. Somatic cells are diploid with 46 chromosomes, while gametes are haploid with 23 chromosomes. Another difference is that somatic cells are involved in forming the body's structure, whereas gametes are essential for reproduction.
For which reasons do the data support the classification of viruses are non living
A.) Viruses contain genetic information
B.) Viruses evolve over time
C.) Viruses reproduce inside host cells
D.) Viruses do not take in nutrients
C. I believe this is the answer based of the chart that you gave
Viruses do not take in nutrients this support the classification of viruses as non-living.
What is virus?A virus is a non-cellular, infectious entity with a microscopic structure that can live by relying on the host cell. It cannot be categorized as a living creature or a non-living material because of its parasitic nature and the traits of both living organisms and non-living substances.
The virus cannot replicate outside the host cell because it lacks the necessary cellular components. To survive, it enters the host body and attaches to a specific cell, injects genetic material, reproduces using host genetic material, and then splits the host cell, releasing new viruses.
Why viruses are considered non-living?Viruses likewise lack the characteristics of living organisms:
They do not have an energy metabolism, do not develop, do not generate waste, and do not respond to stimuli. They can't multiply on their own, thus they have to infiltrate live cells to reproduce.Thus, we can conclude that option D is correct.
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A purebred wingless red eyed fruit fly is crossed with a purebred winged sepia-eyed fruit fly to produce f1 flies. The f1 flies are crossed to produce f2 flies. What is the phenotypic ratio of the f2 flies
The genotypes are all of them and the phenotypes are every option that has at least 1 capital letter. The genotypes are internal features and the phenotypes are the features that are visibly present.
Explain how land cover is related to land use
Answer:
Explanation:
how people are using the land. ... Land cover data documents how much of a region is covered by forests, wetlands, impervious surfaces, agriculture, and other land and water types.
Messanger RNA (mRNA) carries the instructions to a particular __;to ribosomes. The process of producing mRNA from instructions in the DNA is called __.
Durning transaction, the DNA molecule unwinds and separates, exposing the nitrogenous bases. Free RNA ___ pair with the exposed bases. There is no ___ (t) in RNA. ____ (U) pairs with adenine (a) instead. RNA contains the suger ___ Instead of deoxyribose. The mRNA molecule is completed by the formation of ___ between the RNA ___, and it then separated from DNA. The mRNA molecule is a ___ strand, unlike DNA.
mRNA carries genetic instructions from DNA to ribosomes, a process called transcription. Through this process, free RNA nucleotides pair with exposed DNA bases. Unique characteristics of RNA include the presence of uracil instead of thymine, ribose as its sugar, and its single-stranded nature.
Explanation:
Messenger RNA (mRNA) carries the genetic instruction that is transcribed from a specific gene in the DNA to the ribosomes. This process of producing mRNA from the DNA is called transcription. During transcription, the DNA molecule unwinds and separates, thereby exposing the nitrogenous bases. The free RNA nucleotides pair with the exposed bases. Unlike DNA, in RNA there is no thymine (T). Instead, uracil (U) pairs with adenine (A). RNA contains the sugar ribose instead of deoxyribose that is in DNA. The mRNA molecule is completed by the formation of phosphodiester bonds between the RNA nucleotides, and it then separates from the DNA. Unlike DNA, which is double-stranded, the mRNA molecule is a single strand.
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Which of the following describes a relationship of predator-prey?
Oxpecker birds eat parasitic ticks off the backs of zebras
A moray eel eats a fish swimming by
A tick attaches itself to the inside leg of a deer
Birds feed off the insects that are stirred up from the grasses as cattle move through
Answer:
Hello,
The correct answer option is B. A moray eel eats a fish swimming by
Explanation:
A Moray eel is carnivore and feeds on fish, octopuses or crabs. In this case the Moray eel is the predator whereas the fish is the prey.In a predator-prey relationship, one of the species will be hunted for food by the other species.This relationship is important because it can help to slow down the spread of diseases.
Best of Luck!
Answer:
The correct answer is A moray eel eats a fish swimming by.
Explanation:
i took the k-12 test and got 100%
for what reasons is a fanlike diagram a useful model for phylogenetic classification?
Answer:
Because ancestors more common with each other are closer to the center....1000's of species names make more sense by simply looking at it.
Explanation:
yahoo
Final answer:
Phylogenetic trees represent evolutionary relationships and require homologous traits to accurately trace ancestries and evolutionary pathways. They serve as a map of evolutionary history, showing how species are related and have diverged over time.
Explanation:
A fanlike diagram, known as a phylogenetic tree, is a useful model for phylogenetic classification because it illustrates the evolutionary relationships among different organisms or groups of organisms. The reason it is so important for scientists to distinguish between homologous and analogous characteristics before creating such trees is because phylogenetic trees are based on evolutionary connections. Homologous characteristics reflect a common ancestry, while analogous characteristics may be similar due to convergent evolution but not due to a shared ancestor. Therefore, using homologous traits is crucial for accurately depicting the pathways of descent.
Moreover, the phylogenetic tree serves as a map of evolutionary history. Rooted trees have a single lineage at the base, indicating a common ancestor from which all organisms on the diagram diverged. This can help trace the lineage of a single species and discover common ancestors among various species. On the other hand, unrooted trees show relationships but not a common origin. The hierarchical classification is reflected, showcasing the diversity and comparability of different species over evolutionary time.
Nitrogen is changed from a free gas to a usable form by a process called
nitrogen fixation.
nitrogen decomposition.
nitrogen compounding.
nitrogen circulation
Answer:
nitrogen fixation.
Explanation:
Nitrogen fixation is the process by which the combination of molecular nitrogen oxygen or hydrogen is given to give oxides or ammonium that can be incorporated into the biosphere. Molecular nitrogen, which is the majority component of the atmosphere, is inert and not directly usable by most living beings.
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Three portions of a blood sample show clumps in anti-a serum, but not anti-b or anti-rh sera.
Which blood type does the test indicate?
A. A negative (A-)
B. AB positive (AB+)
C. B negative (B-)
D. O negative (O-)
If you add a drop of anti-A serum and it clumps the blood type has blood type B markers that will fight off the A serum making the blood type B....
I got this because...
there is A, B, AB, and O blood
A has anti-B clumping proteins
B has anti-A clumping proteins
AB has no clumping proteins
O has anti-A, anti-B, and anti-AB clumping proteins
so the only on one with anti-A clumping proteins is blood type B
hope this helps :)
The blood type that a blood sample showing clumps in anti-a serum, but not anti-b or anti-rh sera is A negative (A-) (Option A).
The membrane of red blood cells contains many different types of antigens. For example, individuals having a blood type AB have red blood cells with both A and B antigens.A O negative (O-) blood test indicates that the blood sample does not have any antigens, whereas an A negative (A-) test indicates that the blood sample contains only A antigens. It is for that reason that O-negative individuals are universal donors because persons having this type of blood are compatible with all blood types. Moreover, AB-positive individuals are universal recipients because persons with this type of blood can receive blood from all blood types.In conclusion, the blood type that a blood sample showing clumps in anti-a serum, but not anti-b or anti-rh sera is A negative (A-) (Option A).
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Which force created a fault block mountain
• compression
• shearing
• subduction
• tension
Answer: Tension
Explanation:
Tension force is known to be force that pulls rocks apart thereby causing normal faults. Also, it is known to be a force that causes rocks to stretch in order to be thinner in the middle. However, fault Block Mountain is usually formed when plates are moving apart or when large blocks from the earth crust drop down as a result of tension force in relative to other blocks.
Answer:
Tension
Explanation:
I took quiz and got it correct
Geothermal energy comes from_______ deep in the earth
magma
lava
solar power
volcanoes
Answer: magma
Explanation:
What were most likely the first life-forms on Earth?
a
simple single-celled organisms
b
simple multicellular organisms
c
complex multicellular organisms
d
complex single-celled organisms
a would be the answer because protista were the first to be on earth and they had eye spots which could they could barely see out of and then their eyes evolved along with their body and everything but the answer was a
The first life-forms on Earth were likely simple single-celled organisms known as prokaryotes, existing over 3.5 billion years ago, well before the advent of complex multicellular organisms and the Cambrian Explosion that led to a significant increase in life's complexity. Hence the correct option is A.
The First Forms of Life on Earth
These early life forms are believed to be prokaryotes, which are organisms without a nucleus or other membrane-bound organelles. This precedes the later development of more complex life, like multicellular organisms which appeared much later in Earth's history. The first multicellular organisms, such as sponges, had specialized cells but were still far simpler than the complex multicellular organisms we see today. Fossil records suggest that the earlier life forms likely resembled modern-day bacteria in size and simplicity. As for the progression of life, it is broadly accepted that life on Earth started as single-celled, simple organisms, which then evolved over billions of years into a diverse array of complex organisms we have today. This evolutionary process is thought to have begun around 3.5 to 4 billion years ago, and the first multicellular life didn't appear until about 610 million years ago, leading up to the Cambrian Explosion of evolution which expanded life's complexity significantly.
Sarah recently learned about performing a cost–benefit analysis while studying environmental policies. Help her choose the right terms to describe this type of analysis
Answer:
Cost benefit analysis is a way for society to make decisions about complicated issues such as education, health care, transportation, or the environment.
Explanation:
Cost benefit analysis involves a comparison of the costs of an action compared with considerations of the benefits of that action. The most important component of a cost benefit analysis is the base situation or what would happen if no changes were made. A cost-benefit analysis is a process, businesses use to analyze decisions.
Environmental cost-benefit analysis refers to the economic appraisal of policies and projects that have the deliberate aim of improving the provision of environmental services or actions that might affect. it is estimating the strengths and weaknesses of alternatives used to determine options which provide the best approach to achieving benefits.
Answer:
internal expenses , decreases
Explanation: