A few statements with regard to sexual reproduction are given below 

Choose the correct statements from the options below.

1. l and lV

2. l and ll

3. ll and lll

4. l and lV

A multicellular, filamentous alga exhibits a type of sexual life cycle in which the meiotic division occurs after the formation of zygote. The adult filament of this alga has

1. haploid vegetative cells and diploid gametangia

2. diploid vegetative cells and diploid gametangia

3. diploid vegetative cells and haploid gametangia

4. haploid vegetative cells and haploid gametangia

Given below are a few statements related to external fertilisation.

Choose the correct statements.

1. lll and lV

2. l and lll

3. ll and lV

4. l and lV

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

Choose the correct statement from amongst the following.

1. Dioecious (hermaphrodite) organisms are seen only in animals.

2. Dioecious organisms are seen only in plants.

3. Dioecious organisms are seen in both plants and animals.

4. Dioecious organisms are seen only in invertebrates.

Which of the following is a post-fertilisation event in flowering plants?

1. Transfer of pollen grains

2. Embryo development

3. Formation of flower

4. Formation of pollen grains

The number of chromosomes in the shoot tip cells of a maize plant is 20. The number of chromosomes in the microspore mother cells of the same plant shall be

1. 20

2. 10

3. 40

4. 15