External fertilization
These terms are fairly intuitive. External means outside. Internal means inside. Fertilization occurs when the male gamete (sperm) meets the female gamete (egg). External fertilization is fertilization that occurs outside the body, whereas internal fertilization is fertilization that occurs inside the body (usually the body of the female).
External!External fertilization takes place in fishes. This means that the sperm cell of a male is linked together with the egg cell of a female in the external bodies of the individual fish.
after oogenisis the polar bodies disintegrate
It means that when two organisms of the lower level like frogs mate,the female lays the eggs in water and male deposits sperms over it and the fertilization happens externally.
Fish typically fertilize their eggs outside of their bodies. First the female releases her eggs, then the male releases the sperm over the eggs so that it lands on them and fertilizes them.
Frogs
ganglia is a group of cell bodies in the PNS.
Detrivore
kinetic energy
Detrivore
They preserved the bodies of dead soldiers for burial.
maggot Detrivore