Question

WHAT IS MEANT BY EXTERNAL FERTILIZER?​

Answer 1

Answer:

External fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water. ... Most external fertilization happens during the process of spawning where one or several females release their eggs and the male(s) release sperm in the same area, at the same time.

Answer 2

$\fbox\red{ What is Fertilizer? }$

• Fertilizer is an organic or an inorganic material of natural or synthetic origic that is added to soil to supply one or more plants nutrition essential to the growth of plant.

Why do plants need fertilizer?

Plants need to be fertilizers because most soil does not provide the essential nutrients required for optimum growth.

What is external fertilizer?

• The fusion of male gamete (sperm) and female gamete (ovum) occurs outside the body.

• Both individual discharge their gametes outside the body.

• Development occurs outside the body.

• Example :- Frog

What is Internal fertilizer?

• The fusion of gametes occur inside the body.

• Only the male discharges sperms into female genital tract.

• Development occurs inside the body.

• Example :- Humans, Birds, Cattles etc.

Hope it helps you.