Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

Mention the function of saliva other than digestion.

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

The simplest type of canal system in Porifera is:

1. Ascon type.
2. Leucon type.
3. Sycon type.
4. Radial type.

How are prosthetic groups different from cofactors?

Describe the inflorescence type of Solanaceae family.

Which hormone increases in quantity in the blood during excitement and danger?
Describe the changes that occur in the body due to the excess secretion of this hormone.

Name the end products of light reaction of photosynthesis. Mention the fate of each of them.

Anurag and Amit (students of class XIth) were best friends, one day during the lunch time Anurag gave naashpati (Pyrus) to Amit (as he was fond of that). Amit refused to eat it because he did not like them due to their hardness as compared to apples. Anurag reached home and told her mother (a botanist) that he will also not eat naashpati's. His mother corrected him and told him that he should eat it, as it contains the calcium for the growth of the body.

1. What is the reason for the difference in the softness in apple and naashpati fruits?
2. What are sclereids?
3. What values are inferred from mother's of Anurag's character?

Define the following terms: Actinomorphic.

Which of the following phyla has no freshwater animals?

1. Chordata
2. Mollusca
3. Echinodermata
4. Arthropoda