Plant Growth and Development — BIOLOGY STD 11 Science — Question

Why is osmotic potential given a negative sign?

Root pressure cannot account for the translocation of water. True or false? Explain.

1. Why is mitosis also known as an equational division?
2. You are viewing a dividing cell under a microscope. How can you determine whether it is an animal cell or a plant cell?

The skull bones are the strongest bones in the body and thus the brain gets the best protection in the body. In the light of this statement, which of these is true? How will you raise awareness about wearing helmet?

1. We do not need a helmet because skull is enough to take care of the brain.
2. We can manage with a poor quality helmet so that the police does not catch us.
3. Helmets are very important because they help in saving the most important organ; the brain.

Name the end products of aerobic and anaerobic fate of glycolysis. List two ways by which molecules of ATP are produced in glycolysis during aerobic respiration in a cell.

Name the different regions of intestine and their corresponding segments in the earthworms.

How does progesterone function in a human female?

Given below are types of cells present in some animals. Which of the following cells can differentiate to perform different functions?

1. Choanocytes.
2. Interstitial cells.
3. Gastrodermal cells.
4. Nematocytes.

Write short note on the function of Thymosins

What are the four basic shapes of bacteria?