BIOLOGY MIDDLE SCHOOL

The transfer of genes from one population to another

Answers

Answer 1
Answer:

The transfer of genes from one population to another is called gene flow . Gene flow can occur through a variety of mechanisms, including:

Migration: When individuals move from one population to another, they bring their genes with them.

Interbreeding  When individuals from different populations mate, their offspring inherit genes from both parents.

Horizontal gene transfer  This is a process by which bacteria can exchange genes with each other, even if they are not closely related.

Gene flow is an important factor in evolution, as it can introduce new genes into a population and increase genetic diversity. This can help the population to adapt to new environmental conditions and to resist diseases.

Here are some examples of gene flow:

Monarch butterflies  Monarch butterflies migrate from North America to Mexico each year. When they mate in Mexico, their offspring inherit genes from both parents. This gene flow helps to maintain the genetic diversity of the monarch population.

Gene flow is a complex phenomenon that can be affected by a variety of factors, including the distance between populations, the rate of migration, and the presence of barriers to migration.

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Answer 2
Answer:

Answer:

gene flow

Explanation:

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The sac that regulates the temperature of the testes is the ___________.a scrotum
b bladder
c seminal vesicle
d urethra
e epididymis

Answers

It is the scrotum, indeed.
Scrotum sacs that regulate temperature of testes

What would happen if the population of the bird species shown in the ecosystem in Figure 4-1 were to suddenly decrease?•The grass population would increase
•The fish population would increase
•The fish would occupy the bird's niche
•The grass and fish would compete for resources

Answers

Answer: The fish population would increase.

This is because if the number of birds decrease the number of  fishes would automatically increase as there would be less birds to eat the fishes.

According to trophic pyramid if the number of species at higher tropic level decreases the number of species at lower trophic level increases

  • Rest all the options has no interconnections like grass has nothing to do with the fishes and birds as well
  • Fishes cannot occupy bird's niches because both the niches are different
  • The grass and fish cannot compete for resources because their resources are different

Answer:

The second option which is, "The grass population will increase" is the correct option.

Explanation:

  • In the above picture, a bird is eating a fish from the pond. if the population of birds in a community decrease due to some reasons, then there will be no birds for eating fishes.
  • This will cause an increase in the population of fishes.
  • But there is no connection of grass with the increase and decrease of birds species.
  • In ecological pyramids, Birds (secondary consumers) are high than the fishes (primary consumers).
  • As secondary consumers eat primary consumers.
  • Hence the decrease in secondary consumers will increase the population of primary consumers.

Which natural process can change the Earth's surface through glaciers, wind, and flooding? A. earthquake B. tornado C. erosion D. mudslide

Answers

erosion is the best option for all of these

Mercury has a density of 13.5 g/cm^3. What would an object's density have to be for it to sink in mercury?

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It would have to have a density greater than the density of Mercury. For example, if an abject had a density of 14.5 g/cm^3, it would sink when put in Mercury. Hope this helps! :D

All organisms have adaptations. The list below describes how different adaptations might affect different species. A bird species that develops a longer beak would be able to extract insects from holes that are deep within trees. A plant species that develops the ability to excrete salt through the leaves of the plant could survive in soils that have high concentrations of salt. A rodent species that develops the ability to hibernate, or remain inactive during the winter months, would be able to conserve energy when little food is available. Which of the following is true? Adaptations allow individual organisms to change their structures based on environmental conditions. The inherited characteristics of a species change over time based on the use or disuse of particular characteristics. Sudden environmental changes are always necessary for the development of new adaptations. Adaptations increase the probability of an organism surviving and reproducing in a specific environment.

Answers

Adaptations increase the probability of an organism surviving and reproducing in a specific environment.

What do you mean by Environment?

An environment may be defined as anything which is present in the surrounding of living entities either biotic or abiotic.

Adaptations may be defined as an act or process that allows the organism to adapt better to a given condition. Adaptations increase the relative fitness of any organism.

Every organism possesses its own different adaptation in which they have the capability to survive much better.

Therefore, adaptations increase the probability of an organism surviving and reproducing in a specific environment.

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The inherited characteristics of a species change over time based on the use or disuse of particular characteristics.

The venus fly trap is different from most other green plants because it

Answers

the venus fly captures creaters with its mouth has indicatures that tell the plant too close quick which traps them
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