An organism X has a spindle-shaped body and scales on its skin. These type of adaptations are observed in _________ animals.

Q. An organism X has gills present on its body. These type of adaptations are observed in _________ animals.

Q. An organism X has dry skin and scales. It lays eggs and has a three chambered heart. Which of the following animal can possibly be X?

Q. Presence of spindle shaped body with pneumatic bones is a

Q. There are four tiny organisms A, B, C and D. The organism A is a parasitic protozoan which causes a disease known as kala-azar. The organism B is a microscopic single-celled animal which causes malaria disease in human beings. The organism C is a unicellular animal which can change its body shape according to need, it has no fixed shape. The organism D is also a unicellular animal which is slipper-shaped having a large number of tiny hair all around its body.
(a) Name the organisms A, B, C and D
(b) Name one characteristic body feature of organism A.
(c) Name the insect which carries organism B and transmits it from one person to another.
(d) What name is given to the asexual method of reproduction of (i) organism A, and (ii) organism B?
(e) Where do organisms C and D live?

Q. Read the paragraph and answer the following questions.
I am a penguin. I live in polar region covered by snow. My abdomen is white. My skin is thick with a layer of fat underneath. My body is spindle-shaped. My wings are small. My toes are webbed. We live in flocks.
(a) Why is my skin white and thick and why is there a thick layer of fat underneath?
(b) Why do we live in flocks sticking close to each other?
(c) Which geographical region do I inhabit? Why?
(d) Which adaptations should you have to enable you to live permanently in the polar region? Why?