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Mkey [24]
4 years ago
6

According to the video, what are the two key ingredients to natural selection?

Biology
1 answer:
Triss [41]4 years ago
6 0

Answer:

C. Reproduction and Variation

Explanation:

Reproduction could cause gene and chromosomal mutations in the offspring therefore causing variation. The variation could either helpful or detrimental to the offspring depending on the environment and if it helps them live or not.

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A cross between a tall and short plant is made. All of the offspring are intermediate height plants. These intermediate plants a
likoan [24]

Answer:

Tall and short trees are genotypically homozygous for their trait

Intermediated trees are genotypically heterozygous for their trait.

Explanation:

Let the allele representing tall trait be "T"

and the allele representing short trait be "t"

It is given that when a  tall and short plant is fused all the offspring are of intermediate height.

This simply means that the both the plants are genotypically heterozygous for their traits

Genotype for tall tree - TT

Genotype for short tree - tt

TT * tt

Tt, Tt, Tt, Tt

All the offspring are of intermediate height.

Now these two plants of intermediate height are crossed

Tt * Tt

TT, Tt, Tt, tt

Out of four plants two are of intermediate height, one is of tall heingth and the remainig one is of short height

7 0
3 years ago
During the contraction of a protostar, density increases and ________ rises. A) temperature
nydimaria [60]
The nuclear energy would increase

4 0
4 years ago
Read 2 more answers
Diversity among members of a species is important because diversity
Musya8 [376]

Answer:

ensures high level of competition

6 0
3 years ago
The length of the Titanic was 182 feet. Porter's history class is building a model of the Titanic. The model is 1/100 of the act
VLD [36.1K]
182 ×1 = 182 ÷ 100=1.82
7 0
4 years ago
Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
grin007 [14]

Answer:

4 1/4

Explanation:

17/4 = 4/4 + 4/4 + 4/4 + 4/4 + 1/4

4 + 4 = 8

4 + 4 = 8

8+8=16 = 16/4

16/4 + the 1/4 remaining in the equation = 17/4

so 4/4 + 4/4 + 4/4 + 4/4 = 4

4 + 1/4 = 4 1/4

sorry if you couldnt follow along. I am not good at explaining things but the answer is 4 1/4

(I also took the test)

3 0
4 years ago
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