Which of the following plants produces both chasmogamous and cleistogamous flowers?

Which of the following statement$(s)$ is/are correct for cleistogamous flowers?
$(a)$ They have exposed anthers and stigma
$(b)$ They produce assured seed set
$(c)$ They need pollinators for pollination
$(d)$ Variations in traits are not seen in next generation

In haploid organisms that undergo sexual reproduction,name the stage in the life cycle when meiosis occurs. Give reasons for your answer.

In which of the following organisms does the formation of the zygote $NOT$ occur inside the body?

Which plant loses its economic utility if its fruits are produced by induced $..........$?

What is the nature of male gametes in angiosperms?