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2 years ago

Can a female get pregnant from more than one guy at once

Biology

2 answers:

faltersainse [42]2 years ago

5 0

Yeah that's possible in some rare cases

photoshop1234 [79]2 years ago

3 0

Answer:

If there is more than on child.

Explanation:

It is possible for twins to have different fathers in a phenomenon called heteropaternal superfecundation, which occurs when two of a woman's eggs are fertilized by sperm from two different men. Ordinarily, a woman becomes pregnant because one of her eggs has been fertilized by sperm.

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In the ocean how does water temperature change as depth increases

tatuchka [14]

When the upper water layers warm in the summer months, they become separated from deep water by a transition zone known as a thermocline. In a thermocline, the temperature decreases rapidly with small increases in depth. This phenomenon linking temperature change with depth is called temperature stratification.

7 0

2 years ago

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A genetically heterogeneous population of rice has a mean in the number of days to maturation of 30. Selection for decreased per

chubhunter [2.5K]

Answer:

h² = 0.6

Explanation:

Before answering the question, we need to know a few concepts.

Artificial selection is the selecting practice of a specific group of organisms in a population -that carry the traits of interest- to be the parents of the following generations.

Parental individuals carrying phenotypic values of interest are selected from the whole population. These parents interbreed, and a new generation is produced.

The selection differential, SD, is the difference between the mean value of the trait in the population (X₀) and the mean value of the parents, (Xs). So,

SD = X₀ - Xs

Heritability in the strict sense, h², is the genetic component measure to which additive genetic variance contributes. The heritability might be used to determine how the population will respond to the selection done, R.

h² = R/SD

The response to selection (R) refers to the metric value gained from the cross between the selected parents. R can be calculated by multiplying the heritability h², with the selection differential, SD.

R = h²SD

R also equals the difference between the new generation phenotypic value (X₁) and the original population phenotypic value (X₀),

R = X₀ - X₁

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Now that we know these concepts and how to calculate them, we can solve the proposed problem.

Available data:

You are selecting rice´s decreased period of maturation.
The population of rice has a mean maturation time of 30 days → X₀
Parental selected average period to maturation is 25 days → Xs
F1 plants mature on average in 27 days → X₁
N arrow sense Heritability → h²

According to what we sow previously, we need to find out the value of h².

We know that h² = R/SD, so we need to get R and SD first.

R = X₁ - X₀

R = 27 - 30

R = -3

SD = Xs - X₀

SD = 25 - 30

SD = -5

Knowing this, we can calculate h²

h² = R/SD

h² = -3/-5

h² = 0.6

7 0

2 years ago

3. How do nutrients and other materials move in fungi?

12345 [234]

Answer:

Nutrients and other materials from the environment are absorbed through mycelia. The branching mycelia have a high surface-area-to-volume ratio which allows the absorption of nutrients to be more efficient. Fungi may even digest nutrients by releasing enzymes into the environment.

Explanation:

I have a strange feeling that this isn't the answer you were looking for.

6 0

2 years ago

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Define Biosystematics ???

Norma-Jean [14]

Answer:

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Define Biosystematics ???

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taxonomy based on the study of the genetic evolution of plant and animal populations.

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3 0

1 year ago

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Use the following terms in the same sentence: growth rate, birth rate, death rate, emigration and immigration.

Nadya [2.5K]

The growth rate of Earth is decreasing, as the birth rate is the main source. The death rate is mostly abortion which tyes in with birth rate. Much types of emigration have been seen. Mostly Asians, because most asian countries only want the boys and not the girls. Trump is thinking of making a wall to stop mexican immigration.

5 0

2 years ago