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vovangra [49]
2 years ago
14

2 ANSWERS/ WILL GIVE BRAINLIEST

Biology
2 answers:
xxTIMURxx [149]2 years ago
5 0
Mutation and natural selection trigger the evolution of a species

Mutation means there is new variations, as the mutations are passed on to offspring this results in evolution.

Natural selection means a change in phenotypes (the visible traits of a species) of future generations to increase the fitness of a species. This is evolution in progress.

Human opinions do not influence evolution and an unchanged environment would not result in evolution.

I hope this helps! I'm happy to answer any other questions you might have :)
daser333 [38]2 years ago
4 0

Answer:

B and C

Explanation:

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If the integument of an angiosperm seed contains cells with 20 chromosomes, how many chromosomes would you expect to find in the
OleMash [197]

Answer:

30

Explanation:

The seed of an angiosperm is formed as a result of fertilization (fusion of sperm in pollens and the ova from ovary). According to the question, the cells of the seed which will grow into the plant contains 20 chromosomes. Seeds of angiosperms contain a tissue called ENDOSPERM that forms as a result of the unique DOUBLE FERTILIZATION in angiosperms. It occurs when one haploid sperm cell fuses with two haploid polar nuclei to form a triploid endospermic structure that serves as food for the growing embryo in the seed.

Now based on the above explanation, the diploid plant cell with 20 chromosomes will have 10 chromosomes (half as much) in its gametes as a result of meiosis. This 10 chromosomes in each gamete (sperm and ovum) fuses to form a diploid zygote with 20 chromosomes, while one haploid sperm cell (10 chromosomes) also fuses with two haploid polar nuclei (10 chromosomes each) to form a triploid endosperm with 30 chromosomes i.e. 10+10+10.

8 0
3 years ago
Drought can affect soil health. How might an extended drought impact soil formation?
11111nata11111 [884]

Answer:

it might make it crack and harden it will also make it chucky instead of soft grassy fertal soil it will have almost no vitimin for plants to grow or to stay healthly

Explanation:

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7 0
3 years ago
Пстапу усетсе ана мостету
liq [111]

Answer:

adding chlorine, checking the water.

Explanation:

Because this increases the quality of the water while the rest improve either quantity, or ease of access.  

4 0
3 years ago
Read 2 more answers
Which of the following is true based on the cell theory?
Anton [14]
I believe that the answer is: Most organisms are made up of one or more cells
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4 0
2 years ago
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Butoxors [25]
What's the question???
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3 years ago
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