Medium for transport of gametes in Algae, Bryophytes, Pteridophytes.
Air
Insect
Birds
Water
$A$ -In Plant, the end of juvenile phase which makes the : beginning of the growth phase.
$R$ -In Plant, Juvenile phase is also known as vegetative phase.
........and..........is example showing external fertilization
Identify the given figure :
In Ophioglossum (a fern) chromosome number in gamete ..... and in potato chromosome number in gamete is ....
What is the major disadvantage of external Fertilization ?