arrange the different phases in the correct order. write down only the correct letter and no phase can be repeated​:based on meiosis.

The activities of the s phase are maintained by signaling pathways functioning with the cyclase kinases isoenzyme (Cdks)

The main protein kinase that triggers regular mitosis in cells is cyclin-dependent cdk 1 (CDK1). When CDK1 binds to B-type cyclins, primarily cyclin B1, it becomes activated and phosphorylates substrates necessary for mitotic entry.

Without the appropriate cyclin subunit, the CDK enzyme is 40,000 times less active than it is in the quel heterodimer complex, making it crucial for functional response. The CDK activity is controlled by their connection with partner components known as cyclins.

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Answer:

water cycle, also called hydrologic cycle, cycle that involves the continuous circulation of water in the Earth-atmosphere system. Of the many processes involved in the water cycle, the most important are evaporation, transpiration, condensation, precipitation, and runoff. Although the total amount of water within the cycle remains essentially constant, its distribution among the various processes is continually changing.

Answer:

The phenomenon of head lice becoming resistant to the substances used to treat them is an example of natural selection in action.

Initially, when a new substance is used to treat head lice infestations, the majority of the lice population may be susceptible to it. However, some individual lice may have a genetic variation that makes them resistant to the substance. These lice survive and reproduce, passing on their resistant genes to their offspring.

Over time, as the susceptible lice die off and the resistant lice continue to reproduce, the overall lice population becomes more resistant to the substance. This is because the resistant genes are now more common in the population.

This process is known as natural selection. In this case, the substance used to treat head lice infestations is acting as a selective pressure, favoring the survival and reproduction of lice with the resistant genes. As a result, the resistant genes become more common in the population over time.

This is why, in the study mentioned, 82% of head lice were found to be resistant to the substances used to treat them. The resistant genes have become prevalent in the head lice population due to the selective pressure of the treatments used.

Answer:

Precision and accuracy: CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats) technology allows for precise and accurate editing of specific genes within a genome. This technology is much more efficient and effective than previous methods of genetic engineering, such as zinc-finger nucleases and TALENs, which were much more difficult and expensive to use.

Cost and accessibility: The cost of CRISPR technology has dropped dramatically since its discovery, making it more accessible to researchers and scientists. This has led to a proliferation of research in the field of genetic engineering, with more and more labs and institutions adopting CRISPR technology.

Flexibility: CRISPR technology can be used in a wide range of organisms, including bacteria, plants, animals, and even humans. This versatility has made it possible to study and edit genes in a variety of organisms, leading to new insights and discoveries in the field of genetics.

Explanation:

Because smokers' lungs are weak and likely not as robust as non-smokers' lungs, non-smokers can hold their breath for longer.

A nonsmoker is someone who has never smoked, yet who may have done so at some time in their lives. Those who have never smoked or who have smoked fewer than 100 cigarettes in their lifetime are also referred to as never-smokers.

A non-profit group in Canada called the Non-Smokers' Rights Association (NSRA) is committed to preventing tobacco use. It was established in Toronto by nurse Rosalee Berlin, and it immediately became a world authority on tobacco control problems, particularly cigarette sponsorship, tobacco advertising, and tobacco packaging.

The Smoking and Health Action Fund (SHAF), a registered charity in Canada, is its sibling non-profit organization.

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Answer:

A, When biodiversity is high.

Explanation:

High biodiversity indicates a wide range of species with diverse ecological roles, which promotes ecosystem stability and resilience to environmental disturbances. Greater biodiversity also ensures a more complex food web, increasing the availability of resources, and supporting more complex ecological interactions. Furthermore, diverse species provide critical ecosystem services such as nutrient cycling, water purification, and soil formation, enhancing the health of the environment and benefiting human well-being.

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Answer:

Because Some identical twins are not both Male and male /Female and Male

The changes that will take place in ecosystem during the course of succession is the flowers will eventually be shaded out by the trees and will not be able to grow. Option B.

An ecosystem is a structural and functional unit of ecology in which living species interact with one another and with their surroundings. An ecosystem, in other terms, is a series of interactions between creatures and their surroundings. A.G. Tansley, an English botanist, created the word "ecosystem" in 1935.

The Yellowstone fires of 1988 were the biggest wildfire in the history of Yellowstone National Park in the United States. Due to dry conditions and increased winds, the flames swiftly expanded out of control, uniting into numerous enormous conflagrations that lasted for several months. The flames almost damaged two main visitor locations, and the park was closed to all non-emergency workers for the first time in its history on September 8, 1988.  

Only the coming of cold, damp weather in late fall put a stop to the flames. With various levels of intensity, 793,880 acres (3,213 km2), or 36% of the park, burnt.

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Complete question:

During the summer of 1988, fires burned much of Yellowstone National Park, leaving a patchwork of burned and unburned areas. In the year following the fires, wildflowers sprouted in all the burned areas, closely followed in subsequent years by seedlings of the trees that normally grow in the area, such as aspens and lodgepole pines. What changes in the ecosystem will take place during the course of succession?

answer choices

A. The flowers will shade out the small trees creating a permanent meadow.

B. The flowers will eventually be shaded out by the trees and will not be able to grow.

C. The trees will not grow well because of the toxic chemicals produced by the flowers.

D. The trees will take the nutrients that the flowers need, and the flowers will be stunted

in the collection of data in an experiment using the scientific method, there are two sorts of observations, qualitative and quantitative.

Observations that describe something's "qualities" are referred to as qualitative observations. They wouldn't involve counting or measuring and would instead contain qualities like texture, colour, and shape. Using standard scales to count or measure is a need for quantitative observations.

In each case, the subject is aware that they are being watched (do not know they are being watched). The researcher participates in the context or culture being studied.

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The loss of flying ability by the beetle is most probably the result of genetic changes in the beetles.

Flying requires the coordinated action of many genes involved in the development of wings, muscles, and other structures involved in flight. If one or more of these genes undergoes mutations or changes, it can affect the ability of the beetle to fly. The loss of flying ability in beetles can have both positive and negative effects on their survival and reproductive success, depending on the specific environmental conditions they face.

Genetic changes can occur through a variety of mechanisms, including mutations, deletions, duplications, and chromosomal rearrangements. These changes can be caused by environmental factors, such as exposure to radiation or toxins, or can arise spontaneously during DNA replication or cell division. Over time, natural selection may favor beetles with reduced wings or flight muscles if these traits confer a fitness advantage in a particular environment.

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Answer:

Some microorganisms are not single cells, and they can be arranged in different ways. For example, some microorganisms form clusters or colonies, while others form long filaments or chains. Some microorganisms, such as certain types of algae, form multicellular structures that resemble higher plants. Additionally, some bacteria can form structures called biofilms, which are communities of cells that are attached to a surface and encased in a protective matrix. The arrangement of microorganisms can vary depending on their species, environment, and other factors.

Explanation:

The two major classifications of transposable elements in the human genome are: DNA elements and retrotransposons. The correct option is (c).

Transposable elements, also known as jumping genes or mobile genetic elements, are DNA sequences that can change their position within a genome. These sequences play a significant role in the evolution of genomes.

The two major classifications of transposable elements are DNA elements and retrotransposons. They are both capable of moving within the genome, but they use different mechanisms.

DNA elements: These elements use a "cut and paste" mechanism to move within the genome. They have an enzyme called transposase, which is responsible for the movement of the transposable element. There are two main classes of DNA elements: DNA transposons and Helitrons.

Retrotransposons: These elements use a "copy and paste" mechanism to move within the genome. They have an RNA intermediate, which is used to create a DNA copy of the retrotransposon that is then inserted back into the genome.
Retrotransposons have two subclasses: Long Terminal Repeat (LTR) retrotransposons and Non-LTR retrotransposons (also called LINEs and SINEs).

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Answer:

The correct answer is A.

The bottleneck effect refers to a reduction in population size, often caused by a random event such as a natural disaster or human activity, that leads to a loss of genetic diversity in the population. In this case, the population of bald eagles is reduced to near extinction, which would likely result in a significant loss of genetic diversity. If the population recovers, it may do so with reduced genetic variation, which can have negative consequences for the species in the long term.

B is an example of the founder effect, which occurs when a small group of individuals colonizes a new area and starts a new population. The genetic diversity of the new population may be influenced by the characteristics of the founding group.

C is an example of natural selection, where traits that confer an advantage in a particular environment are more likely to be passed on to future generations.

D is an example of artificial selection, where humans intentionally select certain traits to be passed on to future generations. This can result in changes in the genetic makeup of a population over time, but it is not an example of the bottleneck effect.

Answer: It is the farthest planet away from the sun.

Explanation:

Saturn is the sixth planet away from the sun so it's consider a outer planet.

Answer:

200 g

Half-life of rubidium-87 = 4.8 x 10¹⁰ years.

Explanation:

The half-life formula that is given by `N=N_o(1/2)^(t/t1/2)`Where, N = remaining mass N_o = initial mass`1/2` = decay constant`t` = time elapsed`t1/2` = half-life We know that Rubidium-87 has a half-life of 48.8 billion years.

Therefore, using the half-life formula, we can find the time elapsed or the number of half-lives that have gone by. Given, Initial mass `N_o` = 400 g Remaining mass `N` = 100 g Half-life `t1/2` = 48.8 billion years Now, using the formula, we have:100 = 400(1/2)^(t/48.8 billion) Simplifying the equation:1/4 = (1/2)^(t/48.8 billion)

Taking the logarithm of both sides:log(1/4) = log[(1/2)^(t/48.8 billion)]Using the logarithmic property: log(1/4) = (t/48.8 billion)log(1/2)log(1/4) = -2log(1/2)Therefore, we have:-2 = t/48.8 billion Multiplying both sides by 48.8 billion:48.8 billion x -2 = tt = -97.6 billion years Since time cannot be negative, it means there is an error somewhere.

Hence, the initial mass must have been 100 g. Using the same formula, we have:100 = 100(1/2)^(t/48.8 billion)Simplifying the equation:1 = (1/2)^(t/48.8 billion)Taking the logarithm of both sides: log(1) = log[(1/2)^(t/48.8 billion)]0 = t/48.8 billion

Multiplying both sides by 48.8 billion :t = 0Therefore, the number of half-lives that have gone by is 0 and the sample is 0 years old.

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Answer:

Plants have approximately 600 chromosomes.

The idea proposed by Charles Lyell that the same natural processes occurring today also occurred in the past is known as uniformitarianism. This idea had a significant influence on Charles Darwin's thinking and research.

Explain Darwin Idea of uniformitarianism?

Darwin was fascinated by the geological work of Lyell and his idea of uniformitarianism. He applied this concept to biology, arguing that the natural world is in a constant state of flux and change. Darwin realized that if the processes of natural selection that he observed in nature were responsible for the diversity of life today, then they must have also been responsible for the diversity of life in the past.

Therefore, Darwin used the idea of uniformitarianism to support his theory of evolution by natural selection. He recognized that the same processes of variation, selection, and adaptation that occur in nature today also occurred in the past, leading to the evolution of species over time.

In conclusion, Lyell's idea of uniformitarianism was influential in shaping Darwin's thinking about the natural world, and it played a crucial role in the development of his theory of evolution by natural selection.

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Answer: Hey there! I got the answer just for that the answer is

“It inspired him to breed populations to study how traits are inherited.”

Explanation: Took the quiz :>

Using the results of his experiments with pea plant crosses, Gregor Mendel discovered: A) the principles of dominance, segregation, and independent assortment.

In this famous experiment, Mendel cross- pollinated pea plants based on their different features to make important discoveries on how traits are inherited between the generations.

Mendel crossed the pure lines of pea plants. Dominant traits, like purple flower color, appeared in first-generation hybrids (F1), whereas recessive traits, like white flower color were masked. But recessive traits reappeared in second-generation (F2) pea plants in ratio of 3:1 (dominant to recessive).

The experiment allowed Mendel to conclude on two laws of Inheritance; that are Law of Segregation and Law of Independent Assortment.

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Answer:

The dominant trait would be expressed physically (phenotype)

The population has increased until it has reached its carrying capacity is true of the population.

Option D is correct.

Anything that slows or prevents a population from expanding is a limiting factor. Bites, such as food, partners, and competition with other organisms for resources, are examples of limiting factors.

Limiting factors include food, water, light, space, shelter, and access to companions. Individuals will die of starvation, desiccation, and stress in an organism, group, or population that lacks sufficient resources to sustain it, or they will not bear children.

Incomplete question :

What is true of the population shown in this graph? Responses

A.There are no limiting factors to control population growth.

B.It shows the effect of overpopulation on a species.

C.The number of individuals will eventually drop to zero.

D.The population has increased until it has reached its carrying capacity.

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D: The population has increased until it has reached its carrying capacity.

Explanation: k12 1.05

Based on the positions of landscape features in my watershed model, I predict there will be 3 number of watersheds located at these locations in my model:Close to the top, in the center,and to the right.

A watershed is a piece of ground that directs water into a particular body of water. A watershed exists for every source of water. Rainfall and runoff are channelled into waterways and rivers by watersheds. Lakes, bays, and seas are among the bigger sources of water that these lesser ones run into.

For instance, the land region that drains into a lake's watershed would also include the streams that reach the lake as well as the streams' final destination, the lake. Large watersheds that include the watersheds of numerous lesser rivers and waterways are referred to as drainage basins.

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C. Pollution and wildlife do not respect national borders. Even with strict laws in place in individual nations, international treaties or agreements are necessary because environmental issues are often transboundary, affecting multiple countries and regions

the intertidal zone is such an extermely variable environment because it environment experience very high change in elements of the environment it is also called littoral zone it also have rock and Sandy Beaches

First Answer:

Yes, anole lizards are co-evolution!

Explanation:

I couldn't find any explanation for this one! (I hope you can trust me) This is a link. But this will help you get details yourself. Don't report this please, it is actually a real reliable website about wild life. wildlife.org

Second Answer:

Yes, salamanders are co-evolution!

Explanation:

By the time the salamanders reached the southernmost part of California, the separation had caused the two groups to evolve enough differences that they had become reproductively isolated. In some areas the two populations coexist, closing the "ring," but do not interbreed. They are as distinct as though they were two separate species.

Energy changes forms as it moves through an ecosystem, but no new energy is produced. As a result, energy and matter are preserved throughout all ecosystem processes.

The three main cycles of an ecosystem are the water cycle, the carbon cycle and the nitrogen cycle. When these three cycles are in harmony, they remove waste from the ecosystem and replenish it with the nutrients it needs to support life.

As these organisms live and die, matter circulates between the air and soil, as well as among plants, animals, and microbes. In addition to absorbing gases and water from the environment, organisms also emit waste materials back into it.

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The lichen is the creature in the polar tundra ecosystem that fixes the least amount of chemical energy.

The symbiotic relationship between a fungus and an alga or cyanobacterium results in lichen. Lichen can endure harsh environments, but they grow slowly and are not very good at storing the energy produced by photosynthesis. In the polar tundra ecosystem, lichen makes up the base of the food chain and is a source of nutrition for herbivores like caribou and snow geese.

However, they have the lowest trophic level in the food chain since they retain the least energy. The arctic fox has a higher trophic level and maintains more chemical energy since it eats herbivores like caribou and snow geese.

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The proportion of those who have normal hair is homozygous dominant in p2 = (0.106)2 = 0.0112, or around 1.12%.

Scientists must watch a population for at least two generations in order to determine if it is in Hardy-Weinberg equilibrium. Hardy-Weinberg When the allele frequencies in the population's two generations are equal, equilibrium is present.

A population's genetic diversity may be calculated using the Hardy-Weinberg equation when it is in an equilibrium state. The Hardy-Weinberg equation is a key concept in population genetics that G. H. Hardy and Wilhelm Weinberg independently introduced in 1908.

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Question:

In a population of horses, curly hair is a recessive trait compared to normal hair. If 15% of the horses in the population have curly hair, what is the frequency of individuals that are homozygous dominant for normal hair?

The conclusion that can be drawn from Gregor Mendel's experiments with pea plants is that alleles of different genes are inherited independently of each other. This is known as the law of independent assortment.

Gregor Mendel's experiments with pea plants derived three important laws of inheritance. These are:

1. The law of segregation: when two alleles are present in a genotype, they segregate into separate gametes, with each gamete receiving one allele.

2. The law of independent assortment: the inheritance of one gene does not affect the inheritance of another gene.

3. The law of dominance: One allele is dominant over the other and determines the phenotype of the organism. Only in the presence of two recessive alleles does the recessive trait manifest itself.

Mendel's experiments demonstrated that traits are inherited independently of each other and that the inheritance of one trait does not affect the inheritance of another trait. This led to the development of the law of independent assortment, which states that the inheritance of one gene does not affect the inheritance of another gene located on a different chromosome.

Therefore, the statement that can be concluded from Mendel's experiments is that alleles of different genes are inherited independently of each other, which is known as the law of independent assortment. The other statements are not accurate conclusions that can be drawn from Mendel's experiments.

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Answer:

true

Explanation: