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sweet-ann [11.9K]
3 years ago
10

4. What is evolution? Explain how artificial selection causes populations to change.

Biology
1 answer:
blagie [28]3 years ago
4 0

Answer:Artificial selection is the process by which humans choose individual organisms with certain phenotypic trait values for breeding. If there is additive genetic variance for the selected trait, it will respond to the selection, that is, the trait will evolve. evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. Evolution can an animal to make it almost unrecognisable, like cephalopods and how they evolved to make them more buoyant

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A woman and a man are both heterozygous for a recessive allele for a rare genetic disease. If they have one child, what is the p
omeli [17]

Answer:

Probability that at least one of them will be affected = 3/16 + 3/16 + 1/16 = 7/16

Explanation:

If both parents are heterozygous for a genetic disease; Xx and Xx

The offspring's they will produce will be as follows ; XX, Xx, xX, xx

  • Probability that first child will be affected = 1/4
  • Probability that first child will not be affected = 1 - 1/4 = 3/4
  • Probability that first child have it and second does not = 1/4 x 3/4 = 3/16
  • Probability that first child does not have it, second child have it = 3/4 x 1/4 = 3/16
  • Probability that both of them will have it = 1/4 x 1/4 = 1/16
  • Hence, Probability that at least one of them will be affected = 3/16 + 3/16 + 1/16 = 7/16

7 0
3 years ago
Which of the following phenomena is taking place when sound waves are reflected from a surface along parallel lines?
Ksivusya [100]
D. Focusing Sound waves reflected in flat surfaces like walls, floors and ceilings results to uneven dispersion of sounds by creating locations with high intensity and another with low intensity. This process is called Focusing and can be undesirable in auditoriums.
7 0
3 years ago
Need help with number 2 and 5 ​
sweet [91]

Answer:

5 cobition of hyrogen and oxygen equals h2o or water its the cobination of two things

Explanation:

plz dont delet my answer i woked hard to answer :( so plz dont delet it cause i will be upset.also so so sorry i could not answer number two plz dont report me. i just want more brainly my goal is at least 14 brainlys so plz help me reach my goal thx for brainly if you do give me one :)

7 0
3 years ago
In circumstances where the body requires prolonged or increased levels of a hormone, the DNA of target cells will specify the sy
Norma-Jean [14]

Answer:

Up-regulation.

Explanation:

Hormones may be defined as the chemical messengers of the body that can transmit information and maintains homeostasis. The hormones can directly go into the bloodstream and may release through the special ducts.

The receptors of the hormone is required for the binding of the receptors. To maintain the normal homeostasis of the body, the body shows the up regulation and down regulation. In up regulation the hormone levels increases in the body by increasing the receptor on the specific target organ.

Thus, the correct answer is up regulation.

7 0
3 years ago
The biological levels of organization range from a single cell all the way up to the biosphere in a highly structured hierarchy.
Tom [10]

Answer:

B) Tissue is made of different types of cells.

D) Organs are made of different types of tissue.

Explanation:

The tissues are made of different types of cells. The organs are also made of different types of tissue. There is no need of same types of tissues to make organs. Thus, option (B) and (D) is correct answer.

5 0
2 years ago
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