Length of pollen tube depends on the distance between :

In a tobacco plant,the male gametes have $24$ chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote?

Which among the following statements are true for sexual reproduction in flowering plants?
$(i)$ It requires two types of gametes
$(ii)$ Fertilisation is a compulsory event
$(iii)$ It always results in formation of zygote
$(iv)$ Offspring formed are clones

In a flower, the parts that produce male and female gametes (germ cells) are

What are those organisms called which bear both the sex organs in the same individual? Give one example of such an organism.

Define the term 'double fertilization in plants'. After fertilization,name the part in each case which develops into $(i)$ the fruit,(ii) the seeds.