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3 years ago

Living on land required that plants ____.

2 answers:

8 0

I think it would be to exchange gases. When you think about it, plants in the past were always underwater. They didn't have any air. Now, they are on land and need to be able to exchange gases from the leaves to the roots.

Hitman42 [59]3 years ago

7 0

B. Conservar Agua

<h2>ThAnKs YoU 4 Da LiKe YoUr AbOuT tO dRoP</h2><h2>gimme dat like ;p</h2>

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PLEASE HELP Enzymes that produce energy are called _________ enzymes.

sveticcg [70]

Answer:

NADH OR ATP I think

Explanation:

7 0

3 years ago

Which characteristic differentiates amphibians from reptiles?

Stells [14]

Option D – amphibians may use their skin for gas exchange is the characteristic feature of amphibians that differs from reptiles.

Explanation:

The amphibian skin is moist, thin and marbled and supplied by blood vessels running on its surface. The moisture present in the skin dissolves the oxygen present in its surrounding which is absorbed by the blood vessels. Special glands help the amphibians to keep the skin moist.

The very thick and tough scales present on the reptiles prevent them to absorb oxygen through their skin. Hence, they breathe and respire through their lungs.

Amphibians have three-chambered heart. They do not develop amniotic eggs. Adult amphibians although spend much time on land, they breed only in water due to the absence of amniotic sac .

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3 years ago

7) According to scientists, Argentinosaurus is the heaviest known dinosaur. It weighed 220,000 pounds. How much would 1500 Argen

strojnjashka [21]

They would weigh 330000000

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2 years ago

Some people have low levels of calcium circulating in the blood, a condition known as hypocalcemia. while for many this disorder

kap26 [50]

Answer:

low level of calcium would result in fewer signals sent between pre and post synaptic cells.

Explanation:

The calcium has a main role in signal transmission mechanism and here is the mechanism :

1-the impulse reaches the synapse (depolarization which is a voltage change).

2-the voltage gated calcium channels open and let calcium flow into the cell.

3-the calcium causes the synaptic vesicles to rupture and release chemical transmitters which cross the synaptic cleft and finally bind to receptors on the post synaptic cell (transmitting the signal)

so it's obvious that if calcium concentration decreases, the signal transmission also decreases.

8 0

3 years ago

Will give Brainest to the correct answer and 100 points

Neko [114]

Answer:

the guy up top is right

Explanation:

u should give him brainlist

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3 years ago