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Nataly_w [17]
3 years ago
12

A glacier recedes and exposes bare rock. Which of the following will most likely occur next? A. The bare rock will quickly break

down into soil. B. Small animals will move into the area. C. Lichen will colonize the bare rock. D. Trees will start to grow over the bare rock.
Biology
1 answer:
agasfer [191]3 years ago
4 0

Answer:

correct option is A.

Succession is the process by which the structure of a particular community evolves over a specific period of time. There are two types of succession, primary and secondary succession. Primary succession is a type of succession that occurs in a place which is incapable of sustaining the growth of plants, that is, it usually occur on barren lands. All the options given above are examples of places for primary succession with the exception of option A.

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baherus [9]

Answer:

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5 0
3 years ago
"Mendel knew that the allele for smooth (R) seeds was dominant over the allele for wrinkled (r) seeds. If this cross was Rr × rr
s344n2d4d5 [400]

Rr and rr in the ratio of 1:1

Explanation:

If allele for smooth seed is Dominant over the allele for wrinkled seeds, and they are crossed 50 per-cent of the progeny will be heterozygous dominant  and 50 per-cent will be homozygous recessive.

Rr  X  rr

Rr Rr rr rr  F1 generation.

     r      r

R    rR   rr

r     Rr   rr

From Punnet square it will be 50 per-cent  chance each of rr and Rr.

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