What are the functions of the testes in a young male?

$(a)$ List any two methods of asexual reproduction.
$(b)$ Explain how $Spirogyra$ reproduces.

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

What is the surgical procedure of the fallopian tube in females for population control called?

Explain how offspring and parents of organisms reproducing sexually have the same number of chromosomes?

Which bacterium causes the disease syphilis?