Does evolution occur when the gene pool of a population changes?

The pleasure center of the brain is located in the nucleus accumbens.

The nucleus accumbens is a region located deep within the brain, specifically in the basal ganglia, which is involved in reward and pleasure processing. It is part of the brain's reward pathway and plays a crucial role in mediating the experience of pleasure, motivation, and reinforcement. The nucleus accumbens receives input from various brain regions, including the prefrontal cortex and the hippocampus, and integrates this information to regulate feelings of pleasure and reward.

When an individual engages in pleasurable activities such as eating delicious food or engaging in enjoyable activities, the nucleus accumbens is activated, releasing dopamine, a neurotransmitter associated with reward and pleasure. This activation of the pleasure center reinforces the behavior and motivates the individual to seek out similar pleasurable experiences in the future.

In summary, the nucleus accumbens serves as the pleasure center of the brain, playing a vital role in the experience of pleasure and reward.

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In the thought experiment, if all potassium ion channels were blocked and valinomycin, an amphipathic antibiotic, was added to the cells immediately after, the valinomycin would facilitate the diffusion of potassium ions across the plasma membrane of the neurons in their resting state.

This is because valinomycin can effectively replace the solvation shell of the potassium ion while being able to diffuse through the plasma membrane, despite the potassium ion channels being blocked.

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Answer:

All species within that ecosystem would be affected.

Explanation:

Keystone species are species that other organisms largely depend on, if they disappeared, then all organisms within the ecosystems would be affected. For example: Sea urchins would overpopulate and over eat on sea kelp, which may threaten extinction in that area. Sea kelp dying would effect the organisms living/eating sea kelp

Answer:

Virus

Explanation:

Viruses are the smallest thing on this list, followed by bacteria

Answer:

yes

Explanation:

Because we have to understand how plants and animals live their life and help live alongside them in harmony.

The point mutation can alter the amount of DNA sequences depending upon the type of mutation.

A point mutation is a type of mutation in which the DNA or RNA, the organism's genetic material, is altered by the addition, deletion, or modification of a single nucleotide base. The amount of DNA is unaffected by base substitution since the nucleotide count is unaffected after the substitution. The amount of DNA grows with insertions and mutations because there are more nucleotides involved, whereas it decreases with deletion mutations. A common example of substitution point mutation is sickle cell anemia.

Hence, the type of point mutation determines the amount of DNA.

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Answer:

The answer is hot ,mammals

Answer:

Temperate grasslands and  tropical savannas are two biomes that are dominated by grass species, share similar wildlife, and have few  trees . However, while temperate grasslands have  hot summers and cold winters , the other grassland biome has  both rainy and dry seasons .

Answer:

I think the answer is food poison

Answer: poisons fungus poisons

Explanation:

Answer:

b

Explanation:

They will pull the planet with equal gravitational force

Answer:

Answer/Explanation:

In incomplete dominance, one allele is not entirely dominant over the other, so heterozygotes (organisms with two different alleles for the gene) show an intermediate or blended phenotype.

For example, consider flower colour.

In incomplete dominance, two alleles are both expressed, one is not dominant over the other. Therefore, heterozygotes (organisms with two different alleles for the gene) express both traits.

For example, consider flower patterns.

Nature's default eating is to make every mammal's external anatomy suited to its dietary needs. For example, herbivores have broad, flat teeth for grinding and chewing plant material, while carnivores have sharp, pointed teeth for tearing flesh.

Additionally, herbivores have longer digestive tracts to break down and extract nutrients from tough plant fibers, while carnivores have shorter digestive tracts for quickly processing meat. This adaptation of external anatomy to dietary needs ensures that animals are able to efficiently obtain the nutrients they require to survive. However, it is important to note that while this is nature's default eating pattern, individual animals may have unique dietary preferences and adaptations based on their environment and genetics.

Nature's default eating mechanism for mammals considers their external anatomy to ensure efficient and successful consumption. Mammals exhibit a diverse range of anatomical structures, such as teeth, jaws, and digestive systems, to adapt to their specific diets. For example, herbivores possess flat molars for grinding plant material, while carnivores have sharp canines for tearing flesh. Omnivores, like humans, display a combination of these traits. This adaptation enables mammals to effectively obtain and process their food, ensuring survival and maintaining a balance within the ecosystem. Overall, nature designs each mammal's external anatomy to support its dietary needs.

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Answer:

1 genotype is possible

RrYy

The correct answer is c. random differences in survival and reproduction among the individuals in a population.

Genetic drift is a mechanism of evolution that refers to the random fluctuations in allele frequencies within a population over time. It occurs when certain alleles become more or less common in a population due to chance events rather than natural selection. These chance events can include random differences in survival and reproduction among individuals in a population, which can lead to the random loss or fixation of alleles. Genetic drift is particularly influential in small populations where chance events can have a more significant impact on allele frequencies.

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Explanation:

Terms in this set (5)

carbon is abundant, common.

forms strong covalent bonds.

has four valence electrons.

variety of shapes.

bonds with multiple elements

Answer:

- Covalent bonding

- Generally in non-electrolytes

- Low melting point

- Forms a variety of compounds

Explanation:

Edge 2021

Of the available options, the first one states that cellulose is a structural part of the hair, this is not correct for several reasons, first cellulose is a biopolymer characteristic of cellular walls in plants, and it's not present in animal cells, secondly human hair is formed mainly of keratin a protein, therefore their basic units are amino acids, not carbohydrates. Therefore taking this into consideration, the correct answer is option 1.

Answer:

False

Explanation:

There are multiple ways in which the food supply can be introduced to pathogens e.g.

1)inadequate handwashing.

2)cross-contamination.

3)storage and cooking temperatures.

4)contamination of food by animal waste

If in a P generation of true-breeding tall plants that are crossed with true-breeding short plants, 100% of the F1 generation are tall, then this suggest that short is recessive while tall is dominant.

Recessive and dominant alleles for a given phenotypic trait are those that are masked or masked respectively the expression of the feature.

Therefore, with this data, we can see that dominant alleles are able to mask a particular feature in heterozygous individuals as obtained after a line pure cross.

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The factor that is an endogenous factor is: d. Decision as to which herbicide would be best given the farm's IPM (Integrated Pest Management) strategy.

An endogenous factor refers to a factor that originates from within the system or process being studied. In the given options, the endogenous factor is d. Decision as to which herbicide would be best given the farm's IPM (Integrated Pest Management) strategy.

This factor is influenced by internal considerations and decisions made within the system itself. On the other hand, options a, b, and c are exogenous factors because they are external to the system and can affect the system but are not directly determined by it.

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A  higher albedo indicates more reflectivity and a lower albedo indicating less reflectivity.

A surface's reflectivity is measured by its albedo, with a higher albedo indicating greater reflectivity and a lower albedo suggesting decreased reflectivity. The albedo can significantly affect how much solar radiation is absorbed by the surface in the case of sea ice and ocean water.

Due to its high albedo, sea ice reflects a large portion of the sun's incoming radiation back into space.

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Answer:

can you add a picture so I can help you can't solve it without no picture shown

Answer:

Explanation:

Hair grows about 0.3 to 0.5 millimeters each day, or about 1 centimeter per month on average. The rate of hair growth can vary slightly depending on factors such as age, gender, genetics, and overall health.

Hair growth occurs in three stages: anagen, catagen, and telogen. The anagen phase is the active growth phase, during which new hair cells are produced and hair grows. This phase can last anywhere from 2 to 7 years, depending on the individual. The catagen phase is a transitional phase that lasts for about 2 weeks, during which hair growth slows down and the hair follicle starts to shrink. The telogen phase is the resting phase, during which hair growth stops and the old hair falls out. This phase lasts for about 3 to 4 months before the cycle starts again.

Based on this hair growth cycle, the average hair growth rate of about 1 centimeter per month can be calculated. However, it's important to note that individual hair growth rates can vary based on the factors mentioned above.

Answer:

pretty sure its D

Explanation:

because asexual reproduction and parent organism produce similar

The false statement about epigenetic modifications is:
c. Only non-DNA components of chromatin are modified with epigenetic markers.

Epigenetic modifications refer to changes in gene expression that do not involve changes to the underlying DNA sequence. These modifications can be inherited and can influence how genes are turned on or off in different cells or at different stages of development.

a. The tails of the nucleosome octamer components can be modified with methylation: This statement is true. Methylation of the tails of nucleosome octamer components, which are made up of histone proteins, can affect gene expression by either activating or repressing the associated genes.

b. The tails of the nucleosome octamer components can be modified with acetylation: This statement is also true. Acetylation of histone tails is another type of epigenetic modification that can influence gene expression. Acetylation generally leads to gene activation by relaxing the chromatin structure and allowing transcription factors to access the DNA.

d. Epigenetic modifications control whether a region is euchromatin or heterochromatin: This statement is true. Epigenetic modifications play a crucial role in determining whether a region of DNA is in a euchromatin state, which is more accessible for gene expression, or a heterochromatin state, which is more condensed and less accessible for gene expression.

In summary, the false statement is c. Only non-DNA components of chromatin are modified with epigenetic markers. Epigenetic modifications can occur on both DNA and non-DNA components of chromatin, such as histone proteins. These modifications can have significant impacts on gene expression and are essential for cellular development and function.

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Answer:

X-rays because the higher the frequency the shorter the wavelength

Explanation:

The bottleneck capacity in this scenario is 10 candidates per hour. This means that even if the other activities (A and B) can process candidates at a faster rate, the overall process will be limited by the capacity of Activity C.

The term "bottleneck" refers to a point in a process where the flow of activity is constrained, causing a slowdown or inefficiency. In this context, the question asks about the bottleneck capacity in candidates per hour.

To determine the bottleneck capacity, we need to consider the activity that has the slowest rate of completion or the longest time per candidate. Let's say we have three activities: A, B, and C, each taking a different amount of time to complete one candidate.

Activity A takes 5 minutes per candidate, Activity B takes 4 minutes per candidate, and Activity C takes 6 minutes per candidate.

To find the bottleneck capacity, we need to identify the activity that takes the longest time per candidate. In this case, it is Activity C, which takes 6 minutes per candidate.

Now, we can calculate the bottleneck capacity in candidates per hour. Since there are 60 minutes in an hour, we can divide 60 minutes by the time per candidate for the bottleneck activity:

60 minutes / 6 minutes per candidate = 10 candidates per hour



It's important to note that the bottleneck capacity can vary depending on the specific activities and their respective time per candidate. In this case, we used the given times for Activities A, B, and C as an example.

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DNA is directly inherited from an organism's parents, via their gametes, which are produced by the process of Gametogenesis. Thus, if a person has phenylketonuria, they have inherited genetic information that has lead to the production of a dysfunctional protein, specifically a(n) enzyme that normally breaks down phenylalanine.

Phenylketonuria is a rare genetic disease characterized by the presence of a mutation responsible for altering the function of an enzyme in the body responsible for converting the amino acid phenylalanine into tyrosine, which leads to the accumulation of phenylalanine in the blood, which in large concentrations is toxic to the human body.

With this information, we can conclude that DNA is inherited directly from the parents of an organism, through its gametes, which are produced by the process of Gametogenesis. So, if a person has phenylketonuria, they have inherited genetic information that led to the production of a dysfunctional protein, specifically an enzyme (n) that normally breaks down phenylalanine.

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Answer:

high temps all year

Explanation:

Answer:

High Temperatures all year!!

Explanation: