How are the young ones of frogs and other aquatic animals produced?
Frogs and many other aquatic animals lay their eggs and sperms in water. Females lay eggs in slow moving streams. The males also lay their sperms on the eggs. Eggs and sperms are produced in a very large amount because most of these get scattered away due to water, wind and rains. only a few come in contact with each other and get fertilized. They divide and grow into tadpoles.
Draw and describe the male reproductive organs in humans.
Draw a diagram of human reproductive organs and label sperm duct, penis and testis .
How does the embryo get nourishment inside the mother’s body?
Two very small organisms X and Y both reproduce by the method of budding. Organism X is industrially very important because it is used in making alcohol from sugar. It is also used in making bread. Organism Y is a tiny animal having tentacles which lives in water.
(a) What is organism X?
(b) Name the process in which X converts sugar into alcohol.
(c) To which class of organism does X belong?
(d) What is organism Y?
(e) Out of X and Y, which organism is multicellular and which one is unicellular?
