physiology of plants, humans and animals - Category wise Question and Answer Practice Test with Solutions

Question : 11

What wasthe mostsignificant conclusion that Gregor Mendel drew from his experiment with pea plant?

a) Recessive genes occur more frequently in the F1 than do dominant ones.

b) There is considerable genetic variation is garden peas.

c) Traits are inherited in discrete units, and are not the results of “blending”.

d) Genes are composed of DNA.

Question : 12

Pneumatic bones of birds

a) increase the $CO_2$ output

b) increase the heart beat rate

c) increase the respiratory rate

d) increase the buoyancy

Question : 13

Which of the following statement(s) is/are true?

1. Synapsis of homologous chromosomes takes place during prophase I of meiosis.
2. Division of centromeres takes place during anaphase I of meiosis.
3. Spindle fibres disappear completely in telophase of mitosis.
4. Nucleoli reappear at telophase I of meiosis.

a) 1 and 2

b) 3 only

c) 1 only

d) 1, 3 and 4

Question : 14

Nervous tissue is not found in

a) spinal cord

b) brain

c) tendons

d) nerves

Question : 15

Bryophytes are photosynthetic but do not have vascular tissue and true roots. This feature enable them to resemble with which of the following?

a) Pteridophytes

b) Fungi

c) Algae

d) Angiosperms