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bulgar [2K]
3 years ago
11

compare natural selection and artificial selection. in which of these processes do humans play a role?

Biology
1 answer:
SIZIF [17.4K]3 years ago
4 0

Answer:

Artificial selection

Explanation:

Humans actively prevent nature from 'taking it's course' selecting their own pairings for traits that suit them. Ex: breeding for a bigger cow = more beef.

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Scientists have studied the return of plant life on Mount St. Helens ever since the volcano erupted in
zzz [600]

Answer:

C.

The ecosystem there will definitely go through ecological succession by which the structure of the flora there will evolve over time into forests.

7 0
2 years ago
In a standard monohybrid cross between purple-flowered and white-flowered peas, what fraction of the purple-flowered peas in the
Advocard [28]

Answer:

1/3

Explanation:

<em>A standard monohybrid cross is a cross that follows the dominance/recessive pattern from Mendel's experiment.</em>

It means the purple flower color is dominant over the white flower color.

Assuming the allele for purple flower color is P and that of the white flower color is p, a standard monohybrid cross will involve a true breeding PP and pp.

PP   x   pp: Pp, Pp, Pp and Pp. All the F1 offspring will have purple flowers with Pp genotype.

At F2: Pp   x   Pp = PP, Pp, Pp, and pp.

3/4 or 75% of the F2 offspring have purple flower color out of which 1 is true breeding for the trait.

Hence the fraction of the purple flowered peas in the F2 that is expected to be true-breeding (PP) is 1 out of 3.

7 0
3 years ago
What is cancer and what happens to make it occur​
IRISSAK [1]

Answer:

Cancer is a disease in which abnormal cells divide uncontrollably and destroy body tissue.

Explanation:

Cancer is caused by gene mutations, which are sometimes caused by inherited gene mutations (ones you are born with), or mutations that occur after birth (i.e smoking, being overweight, chronic inflammation, viruses, cancer-causing chemicals (carcinogens), hormones, and lack of exercise.)

Your habits (drinking alcohol frequently etc. )

And family history are the main influences of cancer.

However, inherited cancer is usually rare.

Hope this helps!!!

I used to study medicine and so I know a lot about this.

3 0
3 years ago
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Why are there more debates than answers when discussing stem-cell research?
algol [13]

Answer:

Explanation:

bobabooey

3 0
3 years ago
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Please HELP me i cant fail this class What are the two forces of gravity that contribute to tectonic plate movement at mid-ocean
iragen [17]

Answer:

"Plate movement is thought to be driven by a combination of the motion of the seafloor away from the spreading ridge (due to variations in topography and density of the crust, which result in differences in gravitational forces) and drag, with downward suction, at the subduction zones."

Explanation:

Does this help?

5 0
2 years ago
Read 2 more answers
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