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
.
The property of all ionic compounds that makes chalk particularly useful for writing on a chalkboard is : Hardness and Brittleness
Those properties make chalk leaves residues on the board every time friction happen between the chalk and the board
hope this helps<span />
Answer:
In allosteric inhibition, a regulatory molecule binds to a location other than the active site, resulting in a change in enzyme shape that allows the active site to bind substrate.
Explanation:
Allosteric regulation of an enzyme can be positive or negative, but it always involves effector molecules that bind to non-active site of the enzyme and change its conformation. That site of binding is called allosteric or regulatory site. If the enzyme activity is enhanced effector molecule is called allosteric activator but if the activity is decreased effector molecules are allosteric inhibitors.
<h3>yellowfish tuna</h3>
This is the fourth fastest fish, having recorded swimming speed of 76km/h.
<h3>What is Tuna known for ?</h3>
Tuna are remarkable and impressive wild animals. The Atlantic bluefin can reach ten feet in length and weigh as much as 2000 pounds (more than a horse)
- Their specialized body shape, fins and scales enable some species of tuna to swim as fast as 43 miles per hour. Tuna swim incredible distances as they migrate.
- The latest report by the UN shows that tuna is the world's most consumed and the second most wild caught fish in the world.
Learn more about Tuna fish here:
brainly.com/question/14209665
#SPJ4
Answer:
There are two types of planets. Terrestrial and Jovian planets. One thing is common in both of them.
Both the terrestrial and the Jovian planets possess a solid core, made mostly of metallic and/or rocky material.
Hope it helps
