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Finger [1]
3 years ago
7

What is natural selection ?

Biology
1 answer:
sergejj [24]3 years ago
7 0
Natural selection is a theory developed by Charles Darwin. It is believed that animal species evolve by nature "selecting" the ones that are fit to live in specific environments. For example, if an animal lacks a trait that is needed for a certain environment, it is likely to die. The animals that have the needed traits are more likely to live and procreate, which will pass on the trait to its offspring. Hope this helped!
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In arteriosclerosis, overproduction of abnormal collagen and decreased quantities of elastin lead to what?
Tcecarenko [31]

In arteriosclerosis, overproduction of abnormal collagen and decreased quantities of elastin lead to Decreased coronary artery perfusion.

Arteriosclerosis is a condition in which the arteries, which transport oxygen and nutrients from the heart to the rest of the body, thicken and stiffen, often limiting blood flow to the organs and tissues. Flexible and elastic arteries indicate good health. However, the artery walls can stiffen over time, a phenomenon known as arterial hardening.

The accumulation of lipids, cholesterol, and other chemicals in and on the artery walls is known as atherosclerosis. The accumulation is known as plaque. Atherosclerosis can constrict the arteries and obstruct blood flow. The plaque may rupture and cause a blood clot.

Symptoms of arteriosclerosis:

  • chest pressure or discomfort (angina)
  • sudden numbness or weakness in the arms or legs.
  • speech slurs or speaking difficulties.
  • vision briefly lost in one eye.
  • weakened facial muscles
  • ache while walking.
  • elevated blood pressure
  • renal failure

To know more about arteriosclerosis refer to: brainly.com/question/685228

#SPJ4

4 0
2 years ago
Greg was growing an unusual orange daisy in his garden. He carefully saved the seeds to plant next summer. What color might he e
rusak2 [61]

Answer: B

Explanation:

If he saved the seeds and waited till summer the rays of light would make the flower red.

5 0
2 years ago
Joseph Priestly discovered that plants give off, or release_____
sp2606 [1]

Answer:

oxygen

Explanation:

photosenthsesis

4 0
3 years ago
What happens when the Earthis plates pull away from each other? What happens when they push together? ​
Bumek [7]

Answer:

Two plates pushed together create a convergent fault. If one plate is oceanic and the other continental, the edge of the oceanic plate will be pushed down. When two plates move away from each other they create a divergent boundary. When this happens under oceans, new ocean floor is created.

6 0
2 years ago
Which are segments of dna that code for spicific traits ?
Firdavs [7]

Answer:

Gene. A segment of a DNA molecule (a sequence of bases) that codes for a particular protein and determines the traits (phenotype) of the individual. A gene is the basic unit of heredity in a living organism.

8 0
3 years ago
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