During embryogenesis, zygote undergoes
mitosis and cell differentiation
meiosis and cell differentiation
only mitosis
only celldifferentiation
$(a)$ In both plants and animal, have three phases during their life cycle.
$(b)$ In plant and animal, hormones are responsible for the transitions between the three phase.
Which of the following are the carriers of male gametes in seed plants ?
Identify $X$ and $Y$ in given figure
Medium for transport of gametes in Algae, Bryophytes, Pteridophytes.
Archegoniophore and antheridiophore are part of reproductive organ of.........