Organs

Q. The arrangement of tissues into a unit to perform a specific function is called

1. organism
2. cellular system
3. organ system
4. organ

Q. Comment on the cartwheel structure of centriole.

Q. An example of an organ in human beings is :

1. Frogs evolved from gilled ancestors

2. Frogs were amphibious in the past

3. Frogs evolved from frog-like ancestors

4. Frogs will have gills in future

Q. The arrangement of tissues into a unit to perform a specific function is called

1. organism
2. organ
3. organ system
4. cellular system

Q. Define: Organ

Q. On what basis have the following organs been classified?

Group I	Group II
stomach	eye
heart	ears
liver	arms
kidneys	legs

(a) organs of diegestive system and organs of nervous system
(b) internal and external organs
(c) organs producing hormones and organs that do not produce hormones
(d) organs that help in digestion and organs that help in movement

Q. What is the basic unit of gynoecium?

Q. The organ involved in exchange of gases during hibernation in frogs is

1. lungs
2. integument
3. both a and b
4. none of the above

Q. The humming bird, hawk and the humming moth illustrate

1. Adaptive radiation
2. Homology
3. Convergent evolution
4. Divergent evolution