The circulatory system — Biology STD 10 — Question

Name the Following:
The two primary kinds of cell division found in living organisms.

Name the following:
The process by which leucocytes engulf and destroy bacteria.

Name the following:
Animals which eliminate urea.

Mention, where in living organism is the following located and state their main function:
Organ of corti

A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.
What aspect of photosynthesis was being investigated?

Name the Following:
The stage in mitosis when the nucleolus starts disappearing.

Explain the term Plastoquinone.

Name the Following :
Hormone secreted by corpus luteum.

Explain the Term: Particulate pollutant

Name the following:
Organ which produces urea.