Answer:
B. The formation of cancer cells.
Explanation:
DNA mutation causes overproduction of protein which lead to the formation of cancer cells. Mutations in genes is responsible for causing cancer by speed up the rate of cell division or inhibits the normal controls on the system, such as cell cycle or programmed cell death. As a growth of cancerous cells occurs, it can change into a tumor. Cancer is unchecked growth of the cell due to fast cell division so we can conclude that DNA mutation leads to cancer disease.
Answer: Amphibians
Explanation: Reptiles are a group of vertebrates with scaly bodies. They occupy an intermediate position in the evolution between Amphibians and warm blooded vertebrates.Reptiles arise from Amphibians and they possess dry scaly skins.examples of reptiles include snakes,lizards,turtles etc.
The sexes in reptiles are separate.they reproduce by internal fertilization and the eggs are enclosed within protective shells. The eggs of reptiles contains embryonic membranes,yolk sac,amnion,, chorion etc,so that the embryonic in the egg develops before being hatched
The correct statement is the fourth one. The riverbed erodes into a V-shaped valley while the glacier erodes into a U-shaped valley. Glaciers and rivers have tributaries or small rivers that join the main river. For glaciers, as it erodes deeper, the small river is left higher up the steep sides. For rivers, as it erodes, ridges of land form in its upper course.
Amphibians are the animals that supplement the gas exchange that occurs through the lungs with gas exchange through the skin. The members of amphibian animals are Frog, Salamander, Caecilian, Newt, Toads, Diplocaulus, Labyrithodontia, and Anthracosauria. The amphibian are cold-blooded animals, which means that they are the same temperature as the water or air around them.
Regulation
It is vital that the level of ATP in cells remains constant, especially when the demand for energy increases. ... Although high levels of reactive oxygen species lead to cell death and disease, low levels of these species are important for regulating normal cell processes.
