The correct answer is option A, thymus gland
Reason -
The thymus gland is responsible for producing T-cell for the immune system. It is usually active till puberty and then it is replaced as it shrinks down. Though this gland has a short life but it plays a major role in developing the immunity system. For instance if someone has born without a thymus gland , then the person’s body will never be able to produce T –cell or thymosin which is very essential for the immunity system development.
Answer:
D. molecule must utilize a transport protein to cross the cell membrane due to its large size and polar side chains.
Explanation:
Just Took the test
The most obvious starting place for this is to look at what causes our days and nights (the earth rotating on its axis once every 24 hours from west toward the east, so that the sun appears to rise in the east and set in the west), and therefore look at both the sun and the moon. The moon's apparent motion on the sky. Earth rotates or spins toward the east, and that's why the Sun, Moon, planets, and stars all rise in the east and make their way westward across the sky. Earth rotates or spins toward the east, and that's why the Sun, Moon, planets, and stars all rise in the east and make their way westward across the sky.
a. chloroplast and cell wall
The chloroplast contains chlorophyll, which is the stuff that makes plants green. So animals do not have a chloroplast. Only plants have a cell wall and it is what helps plants maintain their shape. Hope this helped! :)
Explanation:
Oxygen speeds the decay of dead organisms. -is the true statement.
