The male gametes of rice plant have 12 chromosomes in their nucleus. The chromosome number in the female gamete, zygote and the cells of the seedling will be, respectively

1. 12, 24, 12

2. 24, 12, 12

3. 12, 24, 24

4. 24, 12, 24

Which of the following situations correctly describe the similarity between an angiospermic egg and a human egg?

1. ll and lV

2. only lV

3. lll and lV

4. l and lV

Q.10 Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because

1. nodes are shorter than internodes

2. nodes have meristematic cells

3. nodes are located near the soil

4. nodes have non-photosynthetic cells 

Offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction because:

There is no natural death in single-celled organisms like Amoeba and bacteria because

1. they can't reproduce sexually

2. they reproduce by binary fission

3. parental body is distributed among the offspring

4. they are microscopic

There are various types of reproduction. The type of reproduction adopted by an organism depends on

1. the habitat and morphology of the organism

2. morphology of the organism

3. morphology and physiology of the organism

4. the organism's habitat, physiology and genetic makeup