Introns are deleted before a gene is transcribed from DNA to RNA because introns are non coding regions between exons their presence will interrupt the translation process.
Explanation:
Introns are the non coding regions on mRNA that are transcribed from a sequence of DNA. The introns are deleted by RNA splicing and only exons are coded so that correct protein is formed otherwise introns would get coded along and wrong protein will be formed. Introns are present in eukaryotic cell.
Introns play a very important role in controlling gene expression. Multiple variant of a particular protein is controlled by introns. An error during splicing would cause a different protein to be code.
Introns are important because all the cells in eukaryotes have same group of genes and to prevent them in getting expressed in all the cells where they are not required.
Which stage represents the establishment of the pioneer organisms? 1. None 2. Grasses 3. Shrubs 4.Loblolly pine trees 5. Blackjack oak trees. Please help, I suck at science.
Answer:
Which stage represents the establishment of the pioneer organisms?
GRASSES
Explanation:
Grasses which are small plants are pioneer organisms as they grow to reach the climax in an ecosystem
Final answer:
The question seeks to identify which stage involves the establishment of pioneer organisms in ecological succession. Pioneer organisms, such as lichens, are the first to colonize lifeless areas, initiating the process by breaking down rock into soil. None of the options provided, like grasses or trees, represent this initial stage.
Explanation:
The question asks which stage represents the establishment of the pioneer organisms. Pioneer species are the first organisms to colonize an area devoid of life, initiating the ecological succession process. These organisms, such as lichens and certain plants, are capable of living in harsh conditions where other species cannot survive. They play a crucial role in breaking down rock into soil, thus paving the way for subsequent species like grasses, shrubs, and trees to establish.
Given the choices, none directly mention pioneer species like lichens or bacteria that typically represent the earliest stage of ecological succession. However, understanding that the question refers to the very start of the succession process, where life begins from bare rock, none of the options listed like grasses, shrubs, loblolly pine trees, or blackjack oak trees fit the description of pioneer organisms. These species come into play at later stages of succession, following the initial establishment by pioneer species.
How did chloroplasts end up in the producers cell
Answer:
they were a paracite
Explanation:
the mitochondrial theorem or something. basically they live in a symbiotic relationship but originally it was two separate life forms. this is true for the mitochondria and chloroplasts
Answer:
They begin as bacteria but are then enlarged by larger cells.
Which is the fifth most common pool where carbon is stored apart from the Earth’s crust, ocean, soils, and atmosphere? The five most prominent pools where carbon is stored include the Earth’s crust, oceans, soil, atmosphere, and the .
Answer:
Explanation:
We can organize all the carbon on earth into five main pools, listed in order of the size of the pool:
Lithosphere (Earth's crust). This consists of fossil fuels and sedimentary rock deposits, such as limestone, dolomite, and chalk. ...
Oceans. ...
Soil organic matter. ...
Atmosphere. ...
Biosphere.
The fifth most common pool where carbon is stored apart from the earth's crust, ocean, soils, and atmosphere is the living biosphere especially the plants.
where is carbon stored in environment ?Most essential element to all living things on earth is carbon which are present every where like in plants and animals, surface and marine.
It regulate global climate including temperature and determine the features of rain water.
The main source of storage of carbon are atmosphere where carbon dioxide and shorter-lived methane CH4 are stored.
In biosphere carbon is present in all living organisms in various forms where as in cryosphere the plants of tundra and arctic regions have the carbon storage.
Pedosphere store organic carbon and the remaining of dead plants & animals where as lithosphere have many of the rocks of the earth’s crust which contain carbon.
Finally hydrosphere have the oceans contain that have dissolved CO2 as well as marine.
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What are the different layers of the sun's atmosphere? Which of these layers can we see, and why?
Different layers present in the sun's atmosphere and layers we will see is explained below.
Explanation:
1.The sun's atmosphere is composed of several layers, mainly the photosphere, the chromosphere and the corona. These outer layers is the sun's energy, which has bubbled up from the sun's interior layers, is detected as sunlight.
Photosphere : lowest layer of the sun's atmosphere is the photosphere. Thickness of this layer is about 300 miles (500 kilometers).In this layer is the sun's energy is released as light. Because of the distance from the sun to Earth, light reaches our planet in about eight minutes.It is marked by bright, bubbling granules of plasma and darker, cooler sunspots, which emerge when the sun's magnetic field breaks through the surface.It is is also the source of solar flares: tongues of fire that extend hundreds of thousands of miles above the sun's surface.Solar flares produce bursts of X-rays, ultraviolet radiation, electromagnetic radiation and radio waves.Chromosphere :Next layer of the sun's atmosphere is the chromosphere.It emits a reddish glow as super-heated hydrogen burns off. But the red rim can only be seen during a total solar eclipse. At other times, light from the chromosphere is usually too weak to be seen against the brighter photosphere. It may play a role in conducting heat from the interior of the sun to its outermost layer, the corona. "We see certain kinds of solar seismic waves channeling upwards into the lower atmosphere, called the chromosphere, and from there, into the corona.Corona : Third layer of the sun's atmosphere is the corona. It can only be seen during a total solar eclipse as well.Corona appears as white streamers or plumes of ionized gas that flow outward into space. Temperatures in the sun's corona can get as high as 3.5 million degrees Fahrenheit (2 million degrees Celsius). As the gases cool, they become the solar wind.The photosphere is the deepest layer of the Sun's atomsphere which we can observe directly. It reaches from the surface visible at the center of the solar disk to about 250 miles (400 km) above that.
The Sun's atmosphere is made up of the photosphere, chromosphere, and corona. We can see the photosphere with the eye. The chromosphere and corona can only be seen during a total solar eclipse.
Explanation:The Sun's atmosphere is composed of three primary layers: the photosphere, the chromosphere, and the corona. The photosphere is the lowest layer and is the part of the Sun that we can see with our eyes. It's essentially the Sun's visible surface.
Above the photosphere, we have the chromosphere. This layer gets its name from the Greek word for 'color' because a red glow is often seen around the Sun during solar eclipses. However, the chromosphere is generally not visible to the eye unless during a total solar eclipse.
Beyond the chromosphere lies the corona, which is the outermost layer of the sun's atmosphere. It is visible during a total solar eclipse as a white halo around the Sun but otherwise is too faint to see due to the brightness of the Sun itself.
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1. A chemical reaction that requires energy is:
(1 Point)
O
exergonic e.g. photosynthesis
endergonic e.g. cellular respiration
exergonic e.g. cellular respiration
o
endergonic e.g. photosynthesis
Answer:
exergonic e.g. photosynthesis
Explanation:
Answer: endergonic e.g. photosynthesis
Explanation: Endergonic reactions are chemical reactions an input of energy to proceed while electronic reactions are chemical reactions that do not require an input of energy rather in an exergonic reaction energy is released.
Photosynthesis is an example of an endergonic reaction because it requires energy. In photosynthesis, the solar energy absorbed by chlorophyll and other light absorbing pigments in plants are conserved as ATP and NADPH which are the sources of energy to drive the remaining reactions of photosynthesis. The solar energy is converted to chemical energy used in driving the photosynthetic reactions. Chemical equation for the photosynthesis is 6CO2 + 6H2O + solar energy ---> C6H12O6 + 6O2.
2. Based on Figure 22–1, which of the following features evolved first in land plants? (1 point)
•flowers
•water-conducting tissue
•seeds enclosed in fruit
seeds
B. Water-conducting tissues
What do we call an individual that has inherited two identical alleles for the same trait?
*serious answers only*
Answer:
heterozygous is the correct answer
Explanation:
Describe one niche in the ecosystem.
Answer:
Niche can be described as the role or position that a particular organism has in its ecosystem.
For example, honeybees which will gather nectar from flowers to make honey is an example of a niche. The particular role of honeybees in an ecosystem is to collect nectar in that ecosystem from different flowers and to produce honey. Other organisms living in the same environment will not perform the same function in the ecosystem.
Do organisms use mitosis, interphase, meiosis, or the G1 phase to grow?
Answer:
mitosis produces more cells and the G1 phase is often referred to as the growth phase, because this is the time in which a cell grows
Explanation:
Which conditions are required for nuclear fusion to begin? The gas cloud must be very dense. Gravitational attraction must stop. Atoms must be stripped of their electrons. Helium atoms must break down into hydrogen. Temperatures must exceed 14 million Kelvin.
Answer:
Explanation:
Fusion requires temperatures about 100 million Kelvin (approximately six times hotter than the sun's core).
At these temperatures, hydrogen is a plasma, not a gas. ...
The sun achieves these temperatures by its large mass and the force of gravity compressing this mass in the core.
Answer:
The gas cloud must be very dense.
Atoms must be stripped of their electrons.
Temperatures must exceed 14 million Kelvin.
Explanation:
I got it right and it says it's not
Gravitational attraction must stop.
Helium atoms must break down into hydrogen.
Definition of stem cell ?
Answer:
Stem cells are cells of the body (somatic cells) which can divide and become differentiated.
Explanation:
Answer:
an undifferentiated cell that can divide to produce some offspring
two parents with normal phenotypes have a daughter who genetically inherited a disorder. Explain how this is possible.
Answer:
Phenotype is physical appearance of the individual while genotype is the genetic makeup of the individual.
Explanation:
Two parents having normal phenotype but effected individual is due to the parents may be Carrier for the particular deseis and the gene responsible for the desies may be in recessive form and the parents are not effected. The gene is not present in dominant form and can not show its effect but the parents are not effected and the daughter may be affected by certain desiese.
Answer: This is possible only if the two parents ar e heterozygous for the trait and the genetic disorder is inherited in a recessive fashion.
Explanation: Phenotype is the outward appearance of an organism. Genotype is the genetic makeup of an individual, a genotype can not be seen but it is manifested in an observable trait known as phenotype. Every trait is controlled by a pair of gene inherited one from each parent. When the two parents are heterozygous for the trait (having one dominant allele and one recessive allele for the trait), a child can inherit two recessive alleles one from each parent.
For example, when two parents are heterozygous for sickle cell disease AS, a cross between them will produce an offspring with sickle cell disease. As x As =AA, As, As, and ss. (A is dominant and s is recessive).
Drag each tile to the correct location on the table. Match the adaptions to the correct biome.
Answer:
desert: plants have structres that conserve water, and animals have ability to burrow to escapde the heat
taiga: trees have soft green needles or leaves , animals migrate to warmer regions during winter
Explanation:
Desert: plants have structures that conserve water and animals have ability to burrow to escape the heat
Taiga: trees have soft green needles or leaves and animals migrate to warmer regions during winter
Desert and taiga ecosystems exhibit distinct adaptations in their plant and animal life to cope with the unique environmental challenges they face. In the desert, where water is scarce and temperatures can be extreme, plants have evolved structures that effectively conserve water. Many desert plants feature specialized adaptations such as deep root systems, succulent tissues, or modified leaves that reduce water loss through transpiration. Additionally, animals in the desert often possess the ability to burrow into the ground to escape the heat, finding refuge in cooler, subterranean environments during the hottest parts of the day.
Conversely, the taiga, characterized by its cold climate, particularly during winter, showcases adaptations in its plant and animal life that address the challenges of low temperatures. Trees in the taiga, such as conifers, typically have soft, needle-like leaves that reduce surface area and water loss, enabling them to thrive in colder conditions. Animals in the taiga often migrate to warmer regions during winter, seeking more hospitable climates where food is more accessible. Migration allows these animals to avoid the harsh winter conditions and scarcity of resources, ensuring their survival in the challenging taiga environment.
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Which of the following is an example of genetic discrimination?
Miranda's doctor asks her to take a genetic test before she gets pregnant.
o Wesley pays more for his insurance than his younger brother.
O Veronica is cut from the swim team because of poor grades.
O Timothy does not get a promotion at work because he has cancer.
Timothy does not get a promotion at work because he has cancer is an example of genetic discrimination.
Explanation:
Genetic discrimination is termed so when an employer or an insurance company treats indifferently an individual with gene mutation or heritable diseases.
The act of not giving promotion and using the genetic information for the reason by the employer is indifferent and termed genetic discrimination as in case of cancer where life expectancy and large insurance claim is the reason.
Insurance companies do not give benefits or insurance to potential people having or prone for having the mutation and heredity disease.
To help overcome this discrimination federal level laws have been implemented as Genetic information non discrimination act. It strictly prohibits the indifferent behaviour of the employers and insurance companies.
Answer:
D.) Timothy does not get a promotion at work b/c he has cancer.
Explanation:
Hope this helps :D
2 Points
Problems with which part of the bone would lead to blood disorders?
A. Compact tissue
B. Spongy tissue
C. Fossae tissue
O
O
D. Bone marrow
SUBMIT
I’m pretty sure it’s D. Blood marrow
Hope that I helped
Answer: d
Explanation:
What is the importance of capillary fluid exchange?
Answer:
Capillary Exchange Mechanisms
Diffusion, the most widely-used mechanism, allows the flow of small molecules across capillaries such as glucose and oxygen from the blood into the tissues and carbon dioxide from the tissue into the blood.
Explanation:
Which of these could be a good reason to end a dating relationship?A.One partner uses physical violence.B.Both partners accept responsibility for their behavior.C.One partner regularly says nice things about the other partner.D.Both partners engage in sexual abstinence
Answer:
a. one partner uses physical violence
Answer:
a.one partner uses physical violence
This was once a forested hillside. The county where this hill is located decided to widen the roads in the area. All of the trees and shrubs were cut down. This area was plowed up and all that was left was large boulders, gravel, and a thin layer of soil. After a year, left undisturbed, these low-growing plants appeared. If left undisturbed, what can we expect to see in this space a few years form now?
Answer:
Unwanted/unplanned growth weeds will cover the whole area.
Explanation:
Because the area was previously forested hillside, it has all the environmental conditions (nutrients, rainfall, etc.) to support the vegetation. Hence, Although the soil layer is thin, natural weathering process would increase the depth of soil layer over the years. Later on, biogeochemical cycles on top layer will result into successful nutrients release to support vegetation. Hence, in a few years, there will be growth of weeds (unplanned vegegation).
Answer:
The plants that once lived here should start to re-establish in the area.
a. Cows that have a spotted coat have a roan coloring. Both (blank)
are expressed. This pattern of
inheritance is a result of (blank)
Answer: Cows that have a spotted coat have a roan coloring. Both genes are expressed. This pattern of inheritance is a result of codominance
Explanation: Every trait is controlled by a gene that occurs in pair. An allele is a different form of a particular gene. Alleles can be dominant or recessive. A dominant gene is one that is able to express itself in the presence of a recessive gene or is able to mask the effect of the other gene. A recessive gene is one whose effect is masked by a dominant gene. When two genes equally express themselves outwardly, they are said to be codominant.
Codominance is a situation whereby neither of the genes is completely dominant rather both express themselves equally phenotypically. In codominance, one gene is not capable of masking the effect of the other.
Definition: This is a cylindrically shaped attachment on the revolving nose piece of a compound light microscope near the specimen
Answer: The answer is objective lens.
ll in the blank.
Wegener's original name for the supercontinent was _______.
When two tectonic plates converge and one slips under the other, a/an _______ zone is formed.
The process of heating the mantle from the core of the earth causes expansion and movement of material in a/an _______ cell, which is partly responsible for the movement of continents.
Gravity is responsible for the movement of continents in two ways: through _______ at subduction zones as gravity drags a plate downward, and through _______ as gravity pushes plates downslope, away from the center.
When two opposing plates meet and scrape against one another at a fault, stress is created when the two moving plates catch or stick together. As this stress is released, a/an _______ occurs.
The Ring of Fire is a region of intense volcanic and seismic activity that borders the _______ Plate.
Answer:
1. Pangaea
2. subduction
3. convection
4. slab pull, ridge push
5. earthquake
6. Pacific
Explanation:
Earth travels around the Sun at about 67,000 miles per hour. Earth's motion, therefore, is an example of _____.
A. speed only
B. velocity only
C. both speed and velocity
Answer:
B. Velocity
Explanation:
Answer: (B.)
Earth travels around the Sun at about 67,000 miles per hour. Earth's motion, therefore, is an example of ''velocity only''
the process where a cell changes from one cell type to another is called
Answer: Cellular differentiation is the process where a cell changes from one cell type to another
Explanation:
Usually, the cell changes to a more specialized type. Differentiation occurs numerous times during the development of a multicellular organism as it changes from a simple zygote to a complex system of tissues and cell types.
I hope this helps.....
Final answer:
Cellular differentiation is the process by which unspecialized cells become specialized into various cell types with specific functions, a key concept in developmental biology. Differentiation is normal in growth, whereas metaplasia is an abnormal cell conversion that can be associated with disease.
Explanation:
The process where a cell changes from one cell type to another is known as cellular differentiation, which is a pivotal aspect of developmental biology. This differentiation process involves unspecialized cells, such as stem cells, becoming specialized into one of the many different types of cells that make up the human body, like neurons or epithelial cells. Cellular differentiation is crucial, as it is the means by which various cell types develop the unique structures and functions necessary to perform specific tasks in the body.
It's important to distinguish between cellular differentiation and metaplasia. While differentiation refers to the normal development of cells into more specialized forms, metaplasia is the abnormal conversion of one mature cell type to another and often occurs in response to chronic irritation or inflammation, as seen in diseases like cirrhosis of the liver.
Which of the following describes a response to external stimuli
A. a person yawns when oxygen levels in the blood are low
B. a child becomes hyperactive due to a chemical imbalance
C. a boy sneezes when exposed to cat dander
D. A girl eats food when she is hungry
Answer:
option C is the right point
the allele for yellow peas is dominant to the allele for green peas. how would you represent the alleles of a plant that is heterozygous for seed color?
Answer: The alleles of a plant that is heterozygous for seed color can be represented as Y for dominant allele for yellow seed and y for recessive allele for green seed.
Explanation: A plant that is heterozygous for seed colour has one dominant allele and one recessive allele for seed colour. If Y represents the dominant allele for yellow seed colour and y represents the recessive allele for green seed colour, therefore the plant has a genotype of Yy. A dominant allele is one that has the ability to mask the effect of a recessive allele while a recessive allele is one whose effect is masked by a dominant allele. Dominant alleles are denoted with upper cases while recessive alleles are denoted with lower cases. A plant that is heterozygous for seed colour with genotype Yy will manifest outwardly as Yellow seed colour due to the presence of the dominant allele Y.
Final answer:
A plant that is heterozygous for seed color, with yellow being dominant over green, would be represented with the genotype Yy. This indicates one dominant allele (Y) for yellow peas and one recessive allele (y) for green peas.
Explanation:
To represent the alleles of a plant that is heterozygous for seed color, where the allele for yellow peas is dominant to the allele for green peas, we use two different letters. As per the Mendelian genetics convention, a dominant allele is indicated using an uppercase letter, while a recessive allele is indicated using a lowercase letter. Since yellow is dominant, we can denote the yellow allele as 'Y' and the green allele as 'y'. Therefore, a heterozygous plant for seed color would have the genotype Yy, indicating it carries one allele for yellow peas and one for green peas.
Pea plants that are homozygous for the yellow trait would have a genotype of YY, and those that are homozygous for the green trait would have a genotype of yy. When these homozygous plants are crossed, as seen in the P generation, the offspring produced are the F₁ heterozygotes with genotype Yy and a yellow phenotype. From this heterozygous state, the offspring can be predicted using a Punnett square analysis to show potential genotypes and phenotypes of the F₂ generation.
The sugar industry is on a decline. To boost sales, sugar executives decide to make a new commercial encouraging consumers to eat sugar. In the commercial, a person is holding a bowl of table sugar. They eat a spoonful of the sugar and say, “Eat sugar, it’s fat free!” Is this false advertising? Use the concepts of biomacromolecules we learned in class to explain your answer.
Answer:
the macro molecule say that
Explanation:
You are running an experiment on photosynthesis rates using the aquatic plant Elodea. Predict how the number of oxygen bubbles will change with different distance from the light source.
Answer:
D. Production of oxygen bubbles will increase as distance of plants from the light source decrease
Production of oxygen bubbles will increase as distance of plants from the light source decrease. The correct option is D.
What is photosynthesis?Photosynthesis is a process that plants and other organisms use to convert light energy into chemical energy that can then be released to fuel the organism's activities via cellular respiration.
Photosynthesis is essential since it's the process by which plants convert carbon dioxide into oxygen using sunlight.
Animals require oxygen to survive, and plants serve as nature's air filter, filtering out harmful carbon dioxide.
When conducting a photosynthesis rate experiment with the aquatic plant Elodea, the production of oxygen bubbles increases as the plants' distance from the light source decreases.
Thus, the correct option is D.
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match each situation to the correct graph.
1. clownfish lay hundreds of eggs,but only 10% to 15% survive into adulthood.
2. 80% of elephant calves survive into adulthood.
3. A population of beetles in a newly colonized field grows exponentially.
4. A wolf population grows over a certain period and then stabilizes.
1. Clownfish lays hundreds of eggs, but only 10 to 15% survive in adulthood. This completely fits for graph number 4 which shows rapid declining in the population by time.
2. 80% of elephant calves survive into adulthood. This is described graphically by graph number 1 where great number of population size increases stably over a certain period of time.
3. A population of beetles in a newly colonized field grows exponentially. So an exponential graph - a "J" shaped curve in graph number 2 which shows an exponential increase in population size.
4. A wolf population grows over a certain period and then stabilizes, can be described by graph number 3 which is a "S" shaped curve.
It shows that after increasing for certain period of time the population stabilizes due to any environmental factors.
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If the beetles disappeared from this community, which changes would be
likely to occur? Select the three correct answers.
A. A decrease in the number of boa constrictors
B. A decrease in the population of sloths
c. A decrease in the population of poison dart frogs
D. An increase in the number of strangler figs
E. An increase in the population of fruit bats
If the beetles disappeared from this community, it would likely cause a decrease in the population of sloths and poison dart frogs, and an increase in the population of fruit bats.
Explanation:If the beetles disappeared from this community, it would likely cause a decrease in the population of sloths, a decrease in the population of poison dart frogs, and an increase in the population of fruit bats.
The beetles serve as a food source for some sloths and poison dart frogs. Without beetles, these species would struggle to find enough food, leading to a decrease in their populations.
Additionally, fruit bats consume fruits, which are produced by plants. If the number of beetles declines, it may result in an increase in the population of fruit bats because there would be less competition for the available fruits.
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Which statement best describes a scientific theory?*
A) It is a collection of data designed to provide support for a prediction
B) It is an educated guess that can be tested by experimentation
C) It is a scientific fact that no longer requires any evidence to support it
D) It is a general statment that is supported by many scientific observations
Answer:
B) It is an educated guess that can be tested by experimentation
Final answer:
A scientific theory is a comprehensive explanation of natural phenomena that has withstood rigorous testing and is widely supported by evidence. It is far more than an educated guess, as it is based on a significant body of facts and confirmed through observation and experimentation. So the correct option is D.
Explanation:
The correct answer to the question is D) It is a general statement that is supported by many scientific observations. A scientific theory is a well-substantiated explanation of some aspect of the natural world that is supported by a large body of facts gathered through observation and experimentation. It is more than just an educated guess or a hypothesis; it is a comprehensive explanation that has been repeatedly tested and confirmed and can explain a wide range of phenomena.
For example, the theory of gravity explains why objects are attracted to one another, and the theory of evolution explains the diversity of life on Earth. These theories have been validated by numerous experiments and observations and are widely accepted by the scientific community because they have withstood rigorous testing.
While theories can be used to make predictions, they are, at their core, explanations that help us understand the world around us. Theories can change over time with new evidence, but such changes are rare and occur through a systematic and often lengthy scientific process. It is important to distinguish between the colloquial use of the term 'theory' as a guess and its scientific usage as a well-supported explanation.