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3 years ago

If immigration and emigration numbers remain equal which of these could cause a slowed growth rate

Biology

2 answers:

rodikova [14]3 years ago

7 0

Answer;

Decreased birthrate

If immigration and emigration numbers remain equal , decreased birthrate could cause a slowed growth rate.

Explanation;

All populations change in size with time . Change in population is dependent of various factors, namely; birthrates, death rates, immigration and emigration.

Therefore; change in population size would be given by the difference of the sum of birth rates and immigration and the sum of death rates and emigration. That is; Change in Population Size = (Births + Immigration) - (Deaths + Emigration). A decreased birth rate with emigration and immigration remaining constant would cause a slowed growth rate.

MaRussiya [10]3 years ago

7 0

A dip in the birthrate may slow down the growth rate, keeping immigration and emigration numbers equal. A constant death rate may also aid in slowing down the growth rate.

Further explanation:

Moving into a region is called as immigration and it is known to be a key facet in the growth of the populations. Emigration, on the other hand, refers to leave a demographic region. The populations gain people via births as well as immigration. They may lose people through emigration and deaths.

Population growth rate refers to how quick a population alters in size over a period of time. A growth rate if positive means that increase in number of individuals in a population whereas a negative growth rate shows that the population is decline. The 2 mina facets that affect the growth of the population are birth rate and death rate.

The population growth might be influenced by the individuals who are coming into the population or leaving the population

The formula for the population growth is:

Here,

r= population growth rate

b=birth rate

i=immigration rate

d=death rate

e=emigration rate

When immigration and emigration are equal, then a drop-in birth rate and constant death rate may cause the decline growth rate of the population.

Learn more:

1. Learn more about an abiotic factor of an ecosystem brainly.com/question/1561256

2. Learn more about primary and secondary succession brainly.com/question/4723069

3. Learn more about the product of photosynthesis brainly.com/question/873199

Answer Details:

Grade: High School

Subject: Biology

Chapter: Populations

Keywords:

population, population growth, immigration, emigration, death rate, birth rate, growth rate, death rate, immigration, people.

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3 years ago

In summer squash, white fruit color (W) is dominant over yellow fruit color (w) and disk shaped fruit (D) is dominant over spher

dangina [55]

Answer:

Genotypic ratio = 16 WwDd: 0

Phenotypic ratio = 16 white, disk shaped fruit : 0 yellow, sphere shaped fruit

Explanation:

This question involves two different genes coding for fruit color and fruit shape respectively. The allele for white fruit color (W) is dominant over yellow fruit color (w) and disk shaped fruit (D) is dominant over sphere-shaped fruit (d).

According to this question, If a squash plant pure-breeding for white, disk shaped fruit (WWDD) is crossed with a plant pure breeding for yellow, sphere shaped fruit (wwdd), the following gametes will be produced by each GAMETE:

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Using these gametes in a punnet square, all of the offsprings will have genotype WwDd, which is phenotypically white and disk shaped fruit.

The genotypic ratio is 4 WwDd: 0

The phenotypic ratio is 16 white, disk shaped fruit : 0 yellow, sphere shaped fruit.