a/r solution 8

zoology:

1. d
analogy is always seen between two animals and not two parts of same animal.

2. b
the organs having similar origin to perform different functions are homologous

3. c
coccyx/caudal vertebrae are vestigial

4. a
neopilina is a mollusc with body segmentation as annelid characteristic

5. b

botany:

1. b
oxysomes/F1 particles are present on cristae and cause phosphorylation

2. a
golgi apparatus (dictyosome in plants) secretes hemicellulose for the formation of cell wall

3. a
acrosome consists of golgi bodies and secretes enzymes that dissolves the egg layers and lead to entry of sperm nucleus into egg

4. d
both a/r were true if Mg 2+ was stated in place of manganese

5. c
lysosome initialises cytokinesis. they reach periphery of cell and burst leading to dissolution of cell membrane called invagination and initialises cytokinesis

chemistry:

1. a

2. a
air expands on heating and density decreases so hot air is lighter. it follows charles law

3. a
by graham's law of diffusion

4. c
real gases obey ideal gas equation only if pressure is low and temperature is high because at low pressure and high temperature the volume occupied by gas molecules is negligible as compared to total volume of gas and force of attraction and repulsion between gas molecules is negligible

5. a

physics:

1. b

2. a
when net force is perpendicular to velocity, uniform circular motion occurs

3. a
direction of force is decided by direction of acceleration which is always downward here

4. c
direction of force is given by direction of acceleration and net acceleration have two components here one parallel and one perpendicular to direction of velocity

5. a

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