P-2 Animal Classification — Science STD 10 — Question

What are Satellite Launch Vehicles? Explain a satellite launch vehicle developed by ISRO with help of systematic diagram.

X and Y are two human beings. The organ A in the reproductive system of X releases a mature gamete B once a month which goes into a tube-like structure C through a funnel-like opening. The organ D in the reproductive system of Y makes and releases gametes E which pass through a duct F and are introduced by an organ of Y, into the body of X. B and E fuse together in C to form a new cell G. The cell G divides repeatedly to form a ball of cells H which gets embedded in the lining of organ I of reproductive system of X where it grows and develops into a baby.

1. Name (i) organ A, and (ii) gamete B.
2. Write two names of tube-like structure C.
3. Name (i) organ D, and (ii) gamete E.
4. Write two names of duct F.
5. Name (i) cell G (ii) ball of cells H, and (iii) organ I.
6. Out of X and Y, which one is (i) male, and (ii) female?

An organism A which cannot move from one place to another, makes a simple food B from the substances C and D available in the environment. This food is made in the presence of a green coloured substance E present in organs F in the presence of light energy in a process called G. Some of the simple food B also gets converted into a complex food H for storage purposes. The food H gives a blue-black colour with dilute iodine solution.

1. What is (i) organism A, (ii) food B and (iii) food H?
2. What are C and D?
3. Name (i) green coloured substance E, and (ii) organ F.
4. What is the process G?

Explain the mechanism of photosynthesis.

Reproduction is the process by which the living species continues its existence. Lower organisms carry out asexual reproduction while higher plants and animals always show sexual reproduction. Plants reproduce asexually by methods such as fragmentation, vegetative propagation, budding, spore formation. For sexual reproduction they form gametes. In animal kingdom, budding, fission of different types and parthenogenesis are some of the methods that do not require both the sexes. Though regeneration also forms new individual, it is not considered to be a reproductive process because, basically it is a repair process. The ability to regenerate is lost in higher phyla. In human beings | it is restricted only to wound healing. Sexual reproduction is also undergoing lots of experimentation such as cloning which may make females capable of producing their own baby without intervention of any male.
Questions and Answers:
(1) How do living species continue their existence?
(2) Which are asexual methods of reproduction in kingdom Animalia?
(3) Why is regeneration not true method of reproduction?
(4) What are methods of reproduction in plants?
(5) What is the modern method of reproduction aimed at in higher organisms?