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Hatshy [7]
3 years ago
5

PLEASE HELP ASAP IM TIMED!! 100 PTS WILL GIVE BRAINLIEST TO WHOEVER ANSWERS FIRST AND CORRECTLY

Biology
1 answer:
Vesna [10]3 years ago
4 0

Answer: More than 99 percent of all organisms that have ever lived on Earth are extinct. As new species evolve to fit ever changing ecological niches, older species fade away. But the rate of extinction is far from constant. At least a handful of times in the last 500 million years, 75 to more than 90 percent of all species on Earth have disappeared in a geological blink of an eye in catastrophes we call mass extinctions.

Though mass extinctions are deadly events, they open up the planet for new forms of life to emerge. The most studied mass extinction, which marked the boundary between the Cretaceous and Paleogene periods about 66 million years ago, killed off the nonavian dinosaurs and made room for mammals and birds to rapidly diversify

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Antidiuretic hormone (ADH) increases a.water reabsorption in the collecting tubule of the kidney. b.urinary output. c.sodium rea
k0ka [10]

Answer:

WATER REABSORPTION IN THE COLLECTING TUBULE OF TE KIDNEY

Explanation:

Antidiuretic hormone synthesized by the neurons in the hypothalamus and the posterior pituitary allows for the reabsorption of water from the collecting ducts of the kidneys back into the circulation.

This therefore reduces the amount of water in the urine causing the formation of concentrated urine and reduced volume of urine.

It causes the increased reabsorption of sodium in the ascending loop of Henle adding to the counter-current mechanism which aids the further reabsorption of water from the distal tubules and collecting ducts.

It also allows the constriction of arteries thereby reducing arterial blood pressure.

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Rama09 [41]

Answer:

Lipids

Explanation:

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in the blue bubbles bby..

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8 0
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Which population might be least likely to be devastated by a new disease outbreak?
IgorLugansk [536]
The answer would be A because a smaller population would die out faster. The best answer is A because they are more diverse which mean everyone is least likely to get the disease.
6 0
3 years ago
4. What is the genotype(s) of a person with type AB blood?
Ilya [14]

Answer:

A person with blood type AB as the genotype AB

Explanation:

A person with blood type A could have the genotype AA or AO. A person with blood type B could have the genotype BB or BO. A person with blood type AB as the genotype AB. And a person with blood type O has the genotype OO.

6 0
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