Digestion and Absorption — BIOLOGY STD 11 Science — Question

Suggest the reasons for Gout, Tetany, Osteoporosis and myasthenia gravis.

How does uricotelism differ from ureotelism?

What is the difference between open vascular bundle and closed vascular bundle?

Comment on the statement–Meiosis enables the conservation of specific chromosome number of each species even though the process per se, results in reduction of chromosome number.

How is the gizzard in the alimentary canal of a cockroach suitable for grinding the food?

Biology teacher while taking class on respiration, told students that respiration is the characteristic feature of living beings, whether it is plant or animal. Ankita listened this, argued with her teacher and asked that plants do not have any structures for respiration then how can they respire. Teacher was impressed by Ankita's question and explained the students about respiration in plants.

1. In which cell organelle does respiration take place?
2. What compound is known as energy currency of the cell?
3. Where does aerobic and anaerobic respiration take place in a cell?
4. Which good quality is possessed by Ankita and her teacher?

Coelom is a cavity between the body wall and alimentary canal and is lined by:

1. Ectoderm and endoderm.
2. Ectoderm and mesoderm.
3. Endoderm on both sides.
4. Mesoderm on both sides.

1. What prevents the trachea and the bronchi from collapsing?
2. Name the epithelium and the cells present in the walls of trachea, bronchi and bronchioles.

What are the terms given below are related to? Also Explain the terms:

1. Coxa.
2. Trochanter.

Differentiate between: Fibrous root and adventitious root.