Photosynthesis in Higher Plants — BIOLOGY STD 11 Science — Question

Special venous connection between liver and intestine and between kidney and intestine is found in frog, what are they called?

Name the cells and their location in the testes, which secrete androgons/ testosterone.

What type of reproduction takes place in Rhodophyceae?

Distinguish between exosmosis and endosmosis.

Describe cell division. List various types of cell division. Also mention about the need of cell division?

Anu after returning from school felt tired and lazy. She felt weak and was unable to even stand by herself. Her mother immediatelly gave her glucose solution to drink. Anu was refreshed and gained energy so fast through it. Next day, she asked her biology teacher that why her mother did not gave her food for instant energy. The biology teacher explained the concept of energy to her.

1. Why did her mother gave her glucose solution?
2. Name the components of the energy carrier ATP.
3. What is the net gain of ATP in eukaryotic cell from one molecule of glucose?
4. What values are shown by Anu?

How do metal ions influence the action of enzymes? Give an example.

Explain the importance of the internal structure of the root.

Where do ultrafiltration, reabsorption and secretion occur in a nephron?

Two common characteristics found in centipede, cockroach and crab, are:

1. Book lungs and antennae.
2. Jointed legs and chitinous exoskeleton.
3. Compound eyes and anal cerci.
4. Green glands and tracheae.