Cell Cycle and Cell Division — BIOLOGY STD 11 Science — Question

What is cardiac cycle? Write the difference between right ventricle and left ventricle.

Endoparasites are found inside the host body. Mention the special structure, possessed by these and which enables them to survive in those conditions.

Biology teacher was teaching cell cycle in the class. She taught that cell is the basis from which life exists. Also explained well about cell cycle. Robin who was a bright student was facing difficulties in understanding the topic he reached home and asked her sister who is a student of biology in a college about details of cell cycle and cell theory. She explained him that according to cell theory, cells arise from pre-existing cells and the process involved is cell division. Sexually reproducing organisms start their life from a single cell, called zygote, and cell divisions do not stop with the formation of a mature organism, but continue throughout the life.

1. What is meant by cell cycle?
2. Which is the actual phase of cell division?
3. When (at what phase) do the cell organelles duplicate?
4. What values are reflected from the Robin's concern?

How is the cardiac impulse conducted to the ventricles to initiate ventricular systole?

Differentiate between
i. Myogenic heart and neurogenic heart.
ii. Lymphatic capillaries and blood capillaries.

How does the phenomenon of mass/ bulk flow differ from that of diffusion?

In animals there are special glands secreting hormones, whereas there are no glands in plants. Where are plant hormones formed? How are the hormones translocated to the site of activity?

Describe the structure and function of a renal corpuscle.

What is:
i. blood,
ii. Serum?