Answer:
Most fossils are found in sedimentary rocks, those rocks produced by the accumulation of sediment such as sand or mud. Wind and other weathering conditions wash away sediment on land, depositing it in bodies of water. For this reason, fossils of sea creatures are more common than those of land creatures.
Fossils are remain of decayed plants and animals over a very long period of time. Most fossils are found in sedimentary rock deposits which might have been exposed due to erosion, quarrying or at shore.
Fossils are usually found in sedimentary rock deposits, which might have become exposed to the surface after thousands to millions of years after deposition began. Since deposits of rock stretch over a very large area, fossils deposited in water which are preserved in sedimentary deposits may be exposed at shore. Also, fossils such as sea shells mollusk are usually washed up shore in large amount.Therefore, fossils could also be found during quarrying and rock cutting process.
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Could a cell be the size of an elephant? Explain your answer
Answer:
no
Explanation:
actually cells are the smallest unit if life and there so small that you need a microscope to see them so they can't be the size of an elephant
A cell could theoretically grow to the size of an elephant, but it would not be practical due to the decrease in the cell's surface area to volume ratio. This would prevent efficient nutrient uptake and waste removal, resulting in cell death.
Explanation:In theory, a cell could grow to an extremely large size. However, in practice, this would be highly impractical due to the surface area to volume ratio of a cell. This ratio determines how efficiently a cell can exchange materials with its surroundings. As a cell grows larger, its volume increases much more rapidly than its surface area. If a cell were the size of an elephant, this ratio would be so small that the cell would not be able to get enough nutrients or remove waste efficiently, causing it to die. Therefore, a cell could not realistically be the size of an elephant.
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PLEASE HELP, WILL GIVE BRAINLIEST!!
In your own words, justify the statement, "Oceanic conditions determine human activities."
Answer:
The statement "oceanic conditions determine human activities" may be interpreted in many ways.
Oceanic conditions determine human activities in that the moon cycle influences the tide. As the moon cycle is said to greatly influence human activity, and the tide changes as the moon does, it may also be concluded that the tides have a similar influence on human activity.
Explanation:
The way humans treat the Earth and the Ocean depends on how the ocean will be and it's conditions. If people keep producing more and more waste soon humans will be forced to put the garbage in the ocean because there will be no more room in landfills. If humans think about how there actions are affecting earth and the Ocean then there can be a big change for the better.
Hope this helps :D
P.S. this was all in my own words :)
If this helped please mark brainliest
-A. Hazle
Question 3(Multiple Choice Worth 4 points)
(02.04 LC)
Which best describes the function of chloroplast?
Allows certa molecules to enter and exit the cell
Makes food during photosynthesis
Detoxifies waste products
O Packages proteins into vesicles
Answer: Option B.
Explanation:
Chloroplast is defined as an organelle found in green plants that contains green pigment called chlorophyll responsible for the process of photosynthesis.
Chloroplasts plays an important role in photosynthesis which is to trap light energy from sunlight and convert it into carbohydrate which further used by cells in teh form of adenosine triphosphate (ATP) and nicotinamide adenine dinucleotide phosphate hydrogen (NADPH).
Hence, the correct option is B.
How would a biologist classify the plant stem shown?
A. Haploid stem
B. Dicot stem
C. Monocot stem
D. Gametophyte stem
Answer:
The correct answer is option B- Dicot stem.
Explanation:
The vascular tissues in the dicot stem are present in the ring form with pith concentrated at the centre of the stem with xylem and phloem separated by the vascular cambium. This type of arrangement with xylem, phloem, pith with no leaf gaps is known as "eustele" which is a characteristic feature of dicot stem.
Since the given diagram shows the ring arrangement of vascular bundles, therefore, the correct answer is option B.
In the dicot stem, the vascular bundles are arranged in a ring, with pith concentrated at the core of the stem, rather than being scattered throughout the plant interior. In each vascular bundle, the xylem and phloem are separated by a substance called vascular cambium.
what does it mean if there are two different alleles for a trait
Answer:
They are know as heterozygous alleles.
Explanation:
Two IDENTICAL alleles are known as homozygous alleles.
I hope this helps you understand the difference, and as always, I am joyous to assist anyone at any time.
Answer:
heterozygous
Explain im smart
what cause for the different seasons on earth
Answer:
Tiltation of the earth
Explanation:
Seasons occur because of the tiltation of the earth and is tilted at an angle of 23.5°. The earth continuously moves around the sun in its elliptical path. Due to this, the sunlight is incident on the earth at different times causing the four types of seasons namely, spring, autumn, winter and summer.
When the earth's imaginary axis of rotation is tilted towards the sun, then the summer season occurs and the opposite side experiences a winter season. During the summer season, the earth is farthest from the sun and this position is called Aphelion whereas during winter the earth and the sun are at its closest position and this is known as the Perihelion.
Since the earth comes closer to the sun in winter, it should experience hotter weather but it experiences cold weather due to its tiltation.
The refractory period is..
I. An increase in the electrical gradient across a membrane
II. A period when the neuron is insensitive to depolarization
III. A decrease in the electrical gradient across a membrane
A. II only
B. I and II only
C. I only
D. I, II, and III
E. III only
Answer:
e is your answer
Explanation:
Depending on the organism the number of in a cell may change
Which of the following are NOT matched correctly?
CD8+: directly destroy infected or cancerous cells
T reg cell: reduce the adaptive response once threat passes
T helper l: activate cellular branch (Cytotoxic T cells, macrophages, NK cells)
T helper 2: stimulate B cells to make antibodies
T helper (CD4+): MHC I
Answer:
T helper (CD4+): MHC I
Explanation:
T helper (CD4+) should be matched with MHC Class II while MHC Class I should be matched with T cytotoxic (CD 8+) cells. This is because T helper cells coreceptors recognize antigen presented on MHC II, to become an effector cell, while CD8+ recognize antigen presented by MHC I.
What is the term for the protective wall that helps bacteria survive unfavorable conditions? A. endospore B. botulism C. aerobic wall D. sporangia
Answer:
The answer is A
Explanation:
Endospores is the protective wall that helps bacteria survive unfavorable conditions.
What is Endospores?An endospore is a dormant, tough, and non-reproductive structure produced by certain bacteria from the Firmicute phylum. Endospore formation is usually triggered by lack of nutrients, and usually occurs in Gram-positive bacteria. In endospore formation, the bacterium divides within its cell wall. It allows the bacterium to produce a dormant and highly resistant cell to preserve the cell's genetic material in times of extreme stress. Endospores can survive environmental assaults that would normally kill the bacterium.
Therefore, (A) option is the correct answer.
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what makes metals in particular good conductors of electricituly
Answer:
Metals are good conductors of electricity because of the ability of electrons to flow throughout the metal.
Explanation:
In metals, the outer electrons of the atoms belong to a 'cloud' of delocalised electrons. They are no longer firmly held by a specific atom, but instead they can move freely through the lattice of positive metal ions, these factors makes them a good conductor of electricity. Electric current is the flow of electrons in a wire. In metals, the outer electrons of the atoms belong to a 'cloud' of delocalised electrons. They are no longer firmly held by a specific atom, but instead they can move freely through the lattice of positive metal ions, these factors makes them a good conductor of electricity .
Answer:
Electron flow in the metals.
Explanation:
Metaks may e defined as the substances that has the ability to lose the electrons and gains a positive charge. The metals are lusturous, shiny and shows conductivity.
The conducrtivity of electricity occurs due to the movement of electrons in the metals. The electrons present inside the metal has the ability to move freely in its structure and hence conduct electricity.
Which is a function of the spinal cord?
Answer:
It is the bodies central nervous system and connects a number of peripheral nerves to the brain.it also sends out information from the brain to parts of the body.
Hope this helps and if it does pls mark as branliest answer thx
Answer:
Spinal cord is about 45 cm long and is present in the vertebral canal of vertebral column. It is made up of two nervous tissue grey matter and white matter. It extends from upper atlas to lower region of first lumbar vertebra.
Through spinal cord many nerve arise which contain sensory and motor axons which perform function of signal transduction. The spinal cord performs two major functions:
1. It transmit the sensory impulse from sensory ascending tracts and motor impulse from motor descending tracts to and from the brain.
2. Helps in generating reflex action very fast by activating motor neurons present in spinal cord.
State why a constant supply of glucose and water are so important to the cell of a plant
A constant supply of glucose and water ensures that plant cells have the necessary energy, raw materials, and hydration for growth, metabolism, and maintaining cell turgidity and functionality.
A constant supply of glucose and water is crucial for the cells of a plant due to their vital functions and roles in cellular processes. Here are the reasons why they are important:
Glucose (Sugar):Energy Production: Glucose is a primary source of energy for plant cells through cellular respiration. It undergoes metabolic reactions to generate ATP (adenosine triphosphate), the energy currency of cells.Biosynthesis: Glucose serves as a building block for the synthesis of other organic molecules, such as cellulose, starch, and various types of carbohydrates, which are essential for cell walls, storage, and structural support.Water:Solvent and Transport: Water is the universal solvent in which many cellular reactions occur. It facilitates the transport of nutrients, minerals, and hormones within the plant and between cells.Photosynthesis: Water is a crucial component for photosynthesis, the process by which plants convert light energy into chemical energy. Water is split during photosynthesis, providing electrons for the production of glucose and releasing oxygen.Learn more about Plant cell, here:
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Which of the following is true of innate behaviors that are described as instincts?
A. Instincts aren't governed by genetics, while innate behaviors are.
B. Instincts are complex series of innate behaviors.
C. Instincts are sudden, situational behaviors.
D. Instincts are governed by genetics, while innate behaviors are not.
Hi,
Which of the following is true of innate behaviors that are described as instincts?
C. Instincts are sudden, situational behaviors.
Answer:
maybe A. Instincts aren't governed by genetics, while innate behaviors are.
Explanation:
I put instincts are sudden, situational behaviors and it was wrong plus the book says "behaviors that are inherited through genetics are called innate behaviors."
How many strands does a RNA molecule have
Answer:
The DNA has one strand while the RNA have two complementary strands, similar to the DNA found in all cells.
Explanation:
RNA molecules are single-stranded but show extensive intramolecular base pairing. This base pairing creates a predictable three-dimensional structure that is essential for the function of RNA.
Explanation:RNA molecules are single-stranded, unlike the double-stranded DNA. However, most types of RNA show extensive intramolecular base pairing between complementary sequences within the RNA strand, creating a predictable three-dimensional structure. This structure is essential for the function of RNA.
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what do theories hypothesis about the conditions of Earth's early atmosphere?
Answer:
The primitive earth has reducing atmosphere with little or no oxygen.
Explanation:
According to several theories, the early atmosphere of the earth was reducing in nature. It had little or no oxygen and was rich in carbon dioxide gas. The atmosphere of primitive earth had water in the form of water vapor. It also had gases like ammonia and methane. Oxygen was added to the atmosphere of earth by first oxygenic photosynthesizing organisms (cyanobacteria) later.
Technology can bring both good and bad things. Pesticides can make crops more resistant to insects (good) but can harm humans if they are used improperly (bad). Give examples of both the good and bad
Answer:
Good: Through technology, doctors can keep electronic health records for a very long time.
Bad: Due to the use of biotechnology, genetically modified organisms can escape into the wild therefore causing events that interrupt the balance of the ecosystem.
Good: Through biotechnology, farmers can use genetic modification to grow more crops at a less expensive rate.
Bad: Genetically modified crops can cause allergies to their consumers.
Final answer:
Pesticides in agriculture provide benefits like improved pest control and economic gains for farmers, but also present risks such as pesticide resistance and environmental damage. Biotechnology advances help reduce reliance on harmful chemicals, but careful management is needed to balance the benefits with potential health and ecological concerns.
Explanation:
Benefits and Risks of Pesticides
The use of pesticides in agriculture presents both positive and negative consequences. One significant benefit is improved pest control, where biotechnology, such as genetically engineered crops, can decrease the reliance on persistent chemicals that might harm the environment. For instance, insect-resistant cotton and herbicide-tolerant crops like soybeans simplify weed and pest management, enhancing agricultural efficiency while minimizing ecological damage.
However, the risks include the potential for pesticide resistance in pest species, a phenomenon driven by natural selection, which can lead to the requirement for more robust pesticides. Additionally, excessive use of chemical pesticides can perturb ecosystem balance by killing off beneficial species, leading to ecological issues and health risks for humans and wildlife through contamination of water sources and the broader environment.
There is also an economic perspective, as pesticides save farmers money by preventing crop losses, offering a significant return on investment. Nevertheless, the overuse and subsequent resistance can result in increased production costs and environmental harm. Therefore, while pesticides can bolster food security and reduce production costs, their impact must be carefully managed to avoid adverse effects on health and the environment.
The blank plays in important role in coordination and the control of body movements
Answer: Cerebellum
Explanation:
Answer:
The Cerebellum
Explanation:
This part of the brain is responsible for many aspects of controlling the body but most notably this section controls coordination, movement, balance, posture and most motor skills.
Genetic diversity is the variation in the genes of an entire species. Each circle represents a population of a particular species in different habitats. Select the population with maximum genetic diversity
Answer:
The second image from left side
Explanation:
Genetic diversity refers to the various genes and their respective alleles present in all the populations of a species. In the given image, the second image from the left side has one yellow, two blue, one red and one green dot. So, it has a total of four types of genes (yellow, red, green and blue) as indicated by dots. Since this circle has the maximum number of different types of dots, it represents the population of the species with maximum genetic diversity.
Answer:
The answer would be the second one
Explanation:
It has a bigger diversity
Which statement describes an endocrine function rather than an exocrine
function?
A. Salivary glands release saliva into the mouth.
B. Sweat glands release sweat onto the skin
C. The pineal gland releases melatonin into the blood.
D. Esophageal glands release mucus into the esophagus.
The pineal gland releases the melatonin into the blood which describes an endocrine function rather than an exocrine function.
Option C
Explanation:
The endocrine gland releases hormones directly into blood which travels through it to reach the target organ. Whereas, the exocrine glands releases their hormones directly into the duct from which they were released to the target area except pineal gland all other gland in the options are the example of exocrine glands.
Bernoulli’s principle explains why birds can fly because it demonstrates how the pressure under a wing is greater than the pressure above a wing
Answer:
The answer is TRUE. :)
Explanation:
Bernoulli’s Principle, a key concept in physics, illustrates how birds fly. The principle explains that faster-moving air applying less pressure than slower-moving air. This difference in air pressure above and beneath a bird's wings creates lift, enabling flight.
Explanation:Bernoulli’s Principle, a concept in physics, explains how birds can fly by demonstrating how air pressure works. According to the principle, when a fluid (in this case, air) moves rapidly, it has lower pressure. Therefore, when a bird flaps its wings, it creates high-speed airflow over the top surface of each wing, resulting in lower pressure above. On the contrary, the air flow is slower beneath the wings, resulting in higher pressure. This differential pressure leads to lift, enabling birds to fly.
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Question 2 of 10
What is the difference between science and pseudoscience?
A. Scientific claims are based, while pseudoscientific claims are
unbiased
B. Science is done only in a laboratory, while pseudoscience is done
in the field
C. Scientific dalms can be tested, while pseudoscientific claims
cannot be easily tested,
D, Pseudoscience is based on observation, while science is based on
empirical evidence
Answer: Pseudoscience such as astrology are almost untestable and have no basis in science. Science must follow the scientific method.
step one- Construct a Hypothesis
step two- test that hypothesis
step three- analyze your findings and draw a conclusion.
step four- communicate your findings
So the correct answer C.
Hope this helps!
Juan received a class assignment to write about organisms that live in extreme environments. While doing research online, he found an image that showed microbial bodies thriving in hot springs. The organisms lacked a nucleus or defined organelles. Which organisms can he possibly find in such conditions?
A.
plant-like protists
B.
animal-like protists
C.
fungus-like protists
D.
archaea
Juan likely found archaea in the hot springs of Yellowstone National Park, specifically prokaryotes that are adapted to extreme environments such as highly saline, acidic, or hot conditions.
Juan came across organisms thriving in the hot springs of Yellowstone National Park, which are known for their extreme environments. These organisms he found lack a nucleus or defined organelles, indicating that they are prokaryotes. Among the types of prokaryotes, one group particularly adapted to such environments are the archaea.
Unlike bacteria, fungi, and viruses, archaea are well-known for living in extreme conditions such as highly saline, acidic, or hot environments, like the Morning Glory pool. These extremophiles often have unique adaptations that enable them to thrive where few other life forms can survive.
1 Point
Which of the following is the best definition of a system?
O
A. A group of objects and materials that are interrelated
O
B. Anything that takes up space and has mass
O
C. The form and arrangement of an object or material
O
D. A collection of cells that share the same function
SUBMIT
Answer:
B. Anything that takes up space and has mass
A group of objects and materials that are interrelated is the best definition of a system. Therefore, the correct option is A.
What is a system?A system refers to a set of interconnected components that work together to achieve a common goal or purpose. Systems can be found in various domains such as science, engineering, social science, and technology. In a system, the individual components or parts are interdependent and their interactions affect the behavior of the system as a whole.
In a human body there are many systems such as the circulatory system, the respiratory system, the nervous system, the skeletal system etc. These systems work together for the overall functioning of the body effectively.Therefore, the correct option is A.
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3. The two ends of a strand of DNA are called the
A. codon and the anticodon, based on the order of the deoxyribose sugars and the phosphate groups.
B.5' and the 3' end, based on modifications in the deoxyribose sugar,
C. starting end and the ending end, based on the orientation of the DNA within the chromosome
OD. sense end and the antisense end, based on the location of the phosphate groups
Answer:
I think its B
Because its how its determine the orientation of the DNA. ? Hope this help
Explanation:
Which of the following describes the importance of cyanobacteria to early Earth atmospheric formation?
A) cyanobacteria released oxygen into the air, creating a protective ozone layer
B) cyanobacteria released nitrogen into the air, creating a protective ozone layer
C) cyanobacteria absorbed excess oxygen from the air, creating proper amounts of atmospheric oxygen
D) cyanobacteria absorbed excess carbon dioxide from the air, creating a protective ozone layer
Answer:A
Explanation:
When is your respiratory rate likely to change
Answer:
Receptors in the brain detect low oxygen or high carbon dioxide and send signals to the body, which can change the breathing rate. ...
option C
Two different versions of a gene are referred to as
Gene variants that arise by mutation and exist at the same relative locations on homologous chromosomes are called alleles. Heterozygosity and homozygosity refer to individuals having two different or identical alleles of a gene on their homologous chromosomes, respectively.
Explanation:Gene variants that arise by mutation and exist at the same relative locations on homologous chromosomes are called alleles. In diploid organisms, two different versions of a gene on their two homologous chromosomes result in being heterozygous for that trait. Conversely, when an organism has two identical alleles of a gene on their two homologous chromosomes, they are considered homozygous for that trait.
Look at the photo of the leaf. Which term best describes this leaf?
Answer:
D simple leaf
Explanation:
Search up pictures of each leaf, and you'll see patterns
A simple leaf best describes this leaf. thus option D is correct.
What is a leaf?The leaf is made up of a large blade (the lamina) that attaches it to the plant stem. Stipules are a pair of structures found on either side of the leaf base in plants that resemble scales, spines, glands, or leaflike structures.
The leaf is called simple when only one blade is put straight on the petiole. Simple leaf margins might be whole and smooth, or they can be in a variety of ways. Dentate margins have teeth that protrude at right angles, whereas serrate margins have teeth that point toward the top of the leaf.
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Question 2 (1 point)
A ______ is a measure of energy in food.
gram
carbohydrate
calorie
none of the above
Answer:
calorie
Explanation:
gram is weight carbohydrate is a type of food