Biological Classification — BIOLOGY STD 11 Science — Question

Why is breathing of women regarded as thoracic, while that of male as abdominal? Also state who among the two has higher vital capacity.

Define respiration. Which steps are involved in respiration?

Write four important functions of hormones.

Mention the four requirements for chemiosmosis to occur.

What are porins? What role do they play in diffusion?

What is Tidal volume? Find out the Tidal volume (approximate value) for a healthy human in an hour.

Match the column A with column B.

	Column I		Column II
A.	Porifera	i.	Canal system
B.	Aschelminthes	ii.	Water-vascular system
C.	Annelida	iii.	Muscular pharynx
D.	Arthropoda	iv.	Jointed appendages
E.	Echinodermata	v.	Metameres

choose the correct option.

1. A-ii, B-iii, C-v, D-iv, E-i
2. A-ii, B-v, C-iii, D-iv, E-i
3. A-i, B-iii, C-v, D-iv, E-ii
4. A-i, B-v, C-iii, D-iv, E-ii

If alpha and beta cells in the Islets of Langerhans of the pancreas are rendered inactive in an individual, explain the affected processes in the organism.

Earty morning Mita and her family returned back from few days holiday trip. While preparing breakfast. Mita saw her mother using bread with a greenish layer grown over it. She stopped her mother not to use such breads. She also explained her that it was due to the growth of bread mould She also advised her to keep bread in refrigerator for avoiding such growth.

1. Name the class to which bread mould belongs.
2. Name the bread mould.
3. Give two examples of the same class.
4. What values are shown by Mita?

Describe the four categories of bacteria, based on the shape of their cells. Represent them diagrammatically too.