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kicyunya [14]
3 years ago
6

This is some barrier to reproduction among a species of organisms. It often results in genetic change over time and the developm

ent of new species.
Biology
2 answers:
Evgesh-ka [11]3 years ago
7 0

Answer:

reproductive isolation

Explanation:

usa test prep;)

Nataly [62]3 years ago
5 0

reproductive isolation

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a man is twice as old as his son.Five years ago the ratio of their ages was 9:4.Find the sum of their ages​
elena-s [515]

Answer:

75years

Explanation:

Let the Father's age be represented by 2x

Let the Son's age be represented by x

Five years ago;

Man's age will be = 2x - 5

Son's age will be = x - 5

If the ratio of their ages five years ago was 9:4, then;

2x - 5/x-5 = 9/4

4(2x - 5) = 9(x - 5)

8x - 20 = 9x - 45

- Collect like terms

-20 + 45 = 9x - 8x

25 = x

Hence, the son's age = 25 years

If x = 25, the father's age (2x) will be 2 × 25 = 50years

The sum of their ages will be = 25years + 50years = 75years

6 0
3 years ago
What are the shadows during a solar eclipse called?
diamong [38]

Answer:

the shadows are called umbra and penumbra

8 0
3 years ago
3)What are some examples of specialized cells
finlep [7]

Answer:

3 Neurons are the specialized cells responsible for allowing all the basic body functions to take place correctly as all the necessary communication happens through them. Muscle cells or myocyte cells are specialized in making all movement possible. These cells have a cylindrical shape that allows them to contract.

Explanation:

4 Each cell must be able to perform as a part of a living organism. Cell specialization is required for cells to perform as a part of a whole living thing. Different cells do different jobs.

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2 years ago
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