Biomolecules — BIOLOGY STD 11 Science — Question

Name the part of the alimentary canal where major absorption of digested food takes place. What are the absorbed forms of different kinds of food materials?

When does the secretion of Adrenocorticotropin take place in the body? What is the purpose of its secretion?

Where is cytochrome-c located? What is its function?

Where is the pineal gland located? Describe the functions of the hormone it secretes.

Write any three advantages of scientific names.

In which one of the following sets of animals do all the four give birth to young ones?

1. Lion, bat, whale, ostrich.
2. Platypus, penguin, bat, hippopotamus.
3. Shrew, bat, cat, kiwi.
4. Kangaroo, hedgehog, dolphin, loris.

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

On which basis angiosperms are classified?

The clam nervous system is composed of:

1. Labial palps.
2. One pair of ganglia.
3. Two pairs of ganglia.
4. Three pairs of ganglia.

Which of the following pairs are correctly matched?

S.no.	Animals		Morphological features
(i)	Crocodile	-	4-chambered heart
(ii)	Sea urchin	-	Parapodia
(iii)	Obelia	-	Metagenesis
(iv)	Lemur	-	Thecodont

1. (i), (iii) and (iv).
2. (ii), (iii) and (iv).
3. Only (i) and (iv).
4. Only (i) and (ii).