1. Migration that can bring new allcles into a population.

A. natural selection

B. mutation

C. genetic drift

D. gene flow

E. sexual selection

2. Chance and random events that can reduce the variation in small population.

A. natural selection

B. mutation

C. genetic drift

D. gene flow

E. sexual selection

3. Individuals with inherited characteristics that allow them to best compete for limited resources will survive and have more offspring than those individuals with variations that are less able to compete. Because characteristics are inherited, these traits will be better represented in the next generation.

A. natural selection

B. mutation

C. genetic drift

D. gene flow

E. sexual selection

4. Leads to traits that may not be well suited to the environment but increase fitness.

A. natural selection

B. mutation

C. genetic drift

D. gene flow

E. sexual selection

5. Ultimate source of brand new alleles in a population.

A. natural selection

B. mutation

C. genetic drift

D. gene flow

E. sexual selection
​

Answer:

step 1: mRNA attaches to the ribosome

step 2: tRNA's attach to free amino acids in the cytoplasmic "pool" of amino acids

step 3: tRNA carries its specific amino acid to the ribosome

step 4: tRNA "delivers" its amino acid based on complementary pairing of a triplet code (anticodon) with the triplet code (codon) of the mRNA

step 5: Enzyme "hooks" the amino acid to the last one in the chain forming a peptide bond

step 6: Protein chain continues to grow as each tRNA brings in its amino acid and adds it to the chain

A tiny electric message moves through a long part of a brain cell called the axon. When a message goes to the end of a nerve, it sends chemicals called neurotransmitters. These substances move through a tiny gap and attach to special parts of another nerve cell's outer covering.

Messages called impulses are sent from one nerve cell to another through a connection called a synapse. This process is called synaptic transmission. Synapses are connections between nerve cells or between nerve cells and other cells, like muscles or glands.

The neuron sending the signal is called the presynaptic neuron. When a signal travels down a nerve cell, it causes little sacs called vesicles to release chemicals called neurotransmitters.

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The interaction between the root and shoot systems during nutrient transport can be described as a coordinated effort to absorb, transport, and distribute water and nutrients throughout the plant.

Roots are a fundamental part of the vascular plants, which are plants with a system of specialized tissues for transporting water, nutrients, and organic compounds throughout the plant. Roots anchor the plant to the ground and absorb water and minerals from the soil. They also store food and nutrients for the plant to use during times of stress.

The shoot system refers to the above-ground parts of the plant, including the stem, leaves, and reproductive structures (such as flowers and fruits). The stem provides structural support for the plant and serves as a conduit for transporting water, nutrients, and organic compounds between the roots and the leaves.

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Answer:

Okkkkkkk

Explanation:

Don't see why your asking a question even though your not asking a question because you're just giving an answer but doing it as a question

Answer:

A codominance

Explanation:

The two ways that technology has hurt the environment is pollution and mental health issues.

Pollution is defined as the release of harmful substances to the environment which can harm the organism living in that ecosystem.

Technology has both being a negative and a positive influence to the environment.

The two ways that technology has hurt the environment is pollution and mental health issues.

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(A) In one experiment, rats placed at the start of a maze learned to run directly to a goal box where food was provided; the purple line shows the rats' route. (B) If the preferred route was blocked, rats could easily find an effective alternative route (orange line), Tolman believed that rats form cognitive maps, internal representations of the layout of the world.

Any visual depiction of an individual's (or a group's) mental model for a particular procedure or idea is called a cognitive maps. The way that concepts and their connections are graphically depicted in cognitive maps is not constrained by any visual conventions that they must abide by. A cognitive map is a mental representation of the actual environment's arrangement. Driving home from work on a familiar route without a GPS is an example of employing a cognitive map.

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Answer:

The answer of the question is

Option D

Both B And C

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I hope it helped you

A fish species that is a member of the Siluriformes phylum is the catfish. This diverse group contains many species of fish that live in freshwater habitats around the world.

The name "catfish" refers to the distinctive whisker-like barbels on catfish that are recognized for their appearance like the whiskers of a cat. Although catfish are found in a variety of shapes and sizes, they typically have long bodies, flat heads, and scaleless skin. They have strong dorsal and pectoral fins, which help them to swim and walk well. The diet of these fish, which are often bottom-dwelling, can include aquatic plants, insects, small fish, and even carrion.

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Answer: global warming

Explanation:

A climate change scenario could involve a city experiencing an increase in extreme weather events, such as hurricanes, floods, and droughts.

The rising global temperatures caused by increased greenhouse gas emissions from human activities can contribute to these extreme weather patterns.

As a result, the city may need to invest in infrastructure to withstand the impacts of these events, such as building sea walls to protect against flooding and implementing water conservation measures during droughts.

In addition, the city may need to adapt its emergency response plans to address the increased frequency and severity of these extreme weather events. This is just one example of a potential climate change scenario that could impact a community.

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Answer:

A carbon footprint is the total greenhouse gas (GHG) emissions caused by an individual, event, organization, service, or product, expressed as carbon dioxide equivalent.[1] Greenhouse gases, including the carbon-containing gases carbon dioxide and methane, can be emitted through the burning of fossil fuels, land clearance and the production and consumption of food, manufactured goods, materials, wood, roads, buildings, transportation and other services.[2]

In most cases, the total carbon footprint cannot be calculated exactly because of inadequate knowledge of and data about the complex interactions between contributing processes, including the influence of natural processes that store or release carbon dioxide. For this reason, Wright, Kemp, and Williams proposed the following definition of a carbon footprint:

Specifications that reduce carbon dioxide expenditure and promote biodiversity are as follows:

1. Provide tree plantation through urban afforestation.

2. It has low concentration of carbon dioxide as plants absorb this gas and release oxygen

3. By promoting fruits and shade for the neighborhood.

Carbon dioxide is defined as the chemical compound which is made up of molecules each containing a carbon atom bonded twice to two oxygen atoms and is found in the gaseous state at room temperature. In air, carbon dioxide is transparent to visible light but absorbs infrared radiation which acts as a greenhouse gas.

This is a minor component of the Earth's atmosphere at about 3 volumes in 10,000 employed by plants in the combustion of carbon-containing material, in fermentation, and in the respiration of animals and in the photosynthesis of carbohydrates.

Thus, specifications that reduce carbon dioxide expenditure and promote biodiversity are as follows:

1. Provide tree plantation through urban afforestation.

2. It has low concentration of carbon dioxide as plants absorb this gas and release oxygen

3. By promoting fruits and shade for the neighborhood.

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A recessive gene  often does not show its trait.

option A.

A recessive gene often does not show its trait when paired with a dominant gene.

In order for a recessive trait to be expressed, an individual must inherit two copies of the recessive allele - one from each parent. If an individual only inherits one copy of the recessive allele, the dominant allele will mask the recessive trait, and the individual will not display the trait.

Option B, "overpowers all others," is incorrect, as this describes a dominant gene, not a recessive gene.

Option C, "always displays its trait," is incorrect, as recessive genes can only display their trait when paired with another recessive gene.

Option D, "is always dominant," is also incorrect, as a recessive gene is by definition not dominant.

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Antennas are structures present in insects and have an essential function for survival.

Among the functions of the antenna we can mention:

• Identify odors, tastes, and sounds;

• Identify changes in the environment they are in and balance;

• Identify some chemicals.

Analyzing the exercise, we can say that the answers are "detecting changes in the environment" and "communicating with other insects through pheromones".

Answer:

\(\fbox\red{question\:given}\)

\(\blue{what \:is\: photosynthesis}\)

\(\huge\fbox\red{Answer↓}\)

\(the \: process \: by \: which \: green \: plants \: \\ turn \: carbon \: dioxide \: and \: water\\ \: into \: food \:using \: energy \: \\from \: sunlight.\)

Explanation:

Precautions:

1. Proper handling of drosophila: It is important to handle drosophila with care, avoiding rough handling and exposure to extreme temperatures.

2. Keeping the experimental setup clean: The experimental setup should be kept clean to avoid contamination and the spread of diseases.

3. Selection of appropriate crosses: The selection of appropriate crosses should be done carefully to obtain accurate results.

4. Use of appropriate food and media: The use of appropriate food and media is crucial for the growth and survival of drosophila.

5. Proper labeling and record-keeping: Proper labeling and record-keeping of experimental setups and crosses help to keep track of the results.

Sources of Error:

1. Mutation: Mutation can occur randomly in drosophila, leading to unpredictable and unexpected results.

2. Environmental factors: Environmental factors such as temperature and humidity can affect the growth and development of drosophila, leading to inaccurate results.

3. Contamination: Contamination with other organisms or pathogens can affect the results of the experiment.

4. Cross-contamination: Cross-contamination of different drosophila strains can affect the results of the experiment.

5. Human error: Human error, such as incorrect labeling or accidental mixing of samples, can affect the accuracy of the results.

Hopes this helps

The food eaten in the zones in the lake include;

Littoral Zone - Sea weed

Limnetic Zone - Plants

Euphotic Zone - Shrimps

Benthic Zone - Calms of shrimps

Littoral Zone: This zone is the lake or pond's shoreline. It is made up of the area between dry land and open water that can be very narrow or very wide.

Limnetic Zone: The open water area of a lake or pond is generally classified as the Limnetic Zone. In oligotrophic ponds and lakes, this is a much larger section of water than in eutrophic bodies of water.

Euphotic Zone: The upper portion of the Limnetic Zone near the water's surface is known as the Euphotic Zone or Epilimnion (warm water region). This is the part of the water that gets sunlight. The zone ends when sunlight cannot penetrate the water.

Benthic Zone: The Benthic Zone consists of organic sediments and soil at the bottom of a pond or lake. This zone will expand as the body of water ages. It is regarded as the digestive system of a pond or lake.

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Mitosis makes two identical daughter cells and Meiosis makes gamete cells

The characteristics of a bug population, such as size, behavior, and reproductive patterns, may change in response to different types of predators due to selective pressures imposed by each predator.

Different predators may have different hunting strategies and preferences, which can lead to differential selection pressures on the bug population. For example, a predator that targets larger bugs may select for smaller body size, while a predator that targets bugs with bright colors may select for duller coloration.

Additionally, different types of predators may have varying levels of effectiveness in controlling bug populations, which can also impact their characteristics over time. The presence of predators can also impact the behavior of bug populations. Bugs may alter their activity patterns, foraging strategies, or mating behaviors to avoid or minimize the risk of predation.

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membrane-bound organelles like the mitochondria and nucleus are specific to the eukaryotic cell

The eukaryotic and the prokaryotic cells differ in the presence of the organelles and the membrane. The nucleus is present in eukaryotic cells but lacking in prokaryotic cells. Thus, option C is correct.

The prokaryotes are the primitive and early cells that have an undifferentiated nucleus (karyon). They are exclusively single-celled organisms that lack organelles and membrane-bounding them. The genetic material is located centrally in the cytoplasm.

On the other hand, eukaryotic cells are unicellular and multicellular organisms that have well-defined central nuclei and membrane-bounded organelles. The nucleus of the eukaryotes is bounded by the nuclear membrane that separates it from the cytoplasm.

The presence of the true nucleus and the compartmentalization of the organelles makes the working more efficient and complex in the eukaryotic cell. Humans, dogs, and cats are eukaryotes, whereas blue-green algae are prokaryotes.

Therefore, option C. the nucleus is present in eukaryotic cells.

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Your question is incomplete, but most probably your full question was, Which of the following is found in a eukaryotic cell, but is not found in a prokaryotic cell?

Cats have evolved certain behaviors that are influenced by their natural instincts and experiences.

When a cat sees milk, it may be attracted to it because it contains nutrients that are important for its survival, and the cat may associate the presence of milk with positive experiences. This can include nursing from its mother as a kitten or catching and consuming prey that contains milk or milk products.

On the other hand, when a cat sees a stick, it may perceive it as a threat or danger, and may associate it with negative experiences, such as being hit or attacked by a predator. This can trigger the cat's natural instinct to flee or hide from potential danger, as a survival mechanism.

Overall, a cat's behavior is influenced by its instincts, past experiences, and environmental cues. It may approach things that it perceives as positive or beneficial, and avoid or flee from things that it perceives as dangerous or threatening.

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1 : second option

2 : first option

3 : last option

Answer:

Explanation:

Available data:  

The genetic distance = recombination frequency x 100 expressed in map units (MU). One centiMorgan (cM) equals one map unit (MU).

We can use the provided map with the distances between genes to predict the occurrence of any kind of recombinant gamete.  

We know that there is a probability of a simple crossing over to occur between genes A and B, or between genes B and C. And we also know that there is a probability of double crossing-over occurrence.

We can get the probability of the double-crossing over by multiplying the recombination frequencies between A-B and B-C. So,

DCO prob = recombination frequency A-B x recombination frequency B-C

                 = 0.1  x  0.03 = 0.003 = 0.3%

DCO prob = 0.3%

According to this, we would expect to find

Now we need to know what are the probabilities of getting a simple crossing-over, SCO. We already have the genetic distances between genes. 10 cM equals 0.1 of recombination frequency, and 3cM equals 0.03 of recombination frequency. However, we can not estimate the probabilities of simple crossing over using only this information, because this data is including the probabilities of the double crossing-over occurrence. So we need to substrate this percentage.    

SCO prob A-B = 0.1 - 0.003 = 0.097 = 9.7%

SCO prob A-B = 9.7%

we would expect to find

SCO prob B-C = 0.03 - 0.003 = 0.027 = 2.7%

SCO prob B-C = 2.7%

we would expect to find

The total Crossing-over probability, TCO, is then the sum of all the crossing over probabilities,

TCO= SCO A-B + SCO B-C + DCO

TCO prob = 9.7% + 2.7% + 0.3%

TCO = 12.7%

Answer:

RM-A can be both a positive and a negative regulator for Enzyme X

Explanation:

It is imperative to obtain more comprehensive information on the signaling pathways in order to assess the regulatory role of the RM-A molecule on X and Y enzymes.  

Enzymes are modulated by molecules that are capable of increasing or reducing enzymatic activity, which are referred to as activators and inhibitors, respectively.

Fructose 2,6-bisphosphate is an essential allosteric regulator that activates phosphofructokinase 1 (PFK1) and thus is capable of increasing the glycolysis rate in response to insulin. On the other hand, an inhibitor may be a pharmaceutical drug used to compete with a substrate for binding to the active site of the enzyme. For instance, the methotrexate chemotherapy drug is known to be a competitive inhibitor.

Answer:

D.) dissociative anxiety disorder

Explanation:

just did the check in on edge 2021! :)

Dissociative diseases are mental illnesses characterized by a loss of connection and continuity between ideas, memories, environment, activities, etc. Dissociative anxiety disorder is not included in this.

Dissociative illnesses generate problems in everyday life because people with them avoid reality in uncontrollable and unhealthy ways.

Dissociation is an overwhelming response to sensory stimuli associated with a person's trauma.

Certain sights, sounds, scents, touches, and even tastes can trigger, a cascade of negative memories and feelings, even years after the traumatic incident or circumstances have passed.

It includes:

Thus, the correct option is D.

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Answer:

e. all of the above

Explanation:

Photosynthesis and respiration are two complementary processes.

The independent variable in this experiment is the number of rats.

The dependent variable is the mass of each rat.

The control group in this experiment is the mass of each rat.

Nutritionists commonly work with individuals or populations to teach them more approximately general nutrients, food, and health. Their recognition is of meal behavior. This consists of working with people to plot and put in force meal plans that improve the person's or circle of relatives' nutrition.

In place of dietitians, who're qualified to diagnose eating disorders and lay out diets to treat particular medical conditions, nutritionists address standard dietary pursuits and behaviors. Nutritionists are regularly employed in faculties, hospitals, cafeterias, lengthy-term care centers, and athletic businesses

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Potential Energy

When it’s not moving it’s potential energy but when it’s moving it’s kinetic energy