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What is an archeopteryx ?

What is the function of:

(a) myelin sheath

(b) CSF

The messages carried by a neuron is called:

Introduction of weak and dead microbes into the body is called_________.

Which of the following organs produces the male gametes in the human reproductive system?

Lack of sleep has a direct effect on the production of three hormones and brain neurotransmitters, which in turn have a bearing on our health.

Complete the table below to show the above.

Lack of sleep Effect on the production of Ultimate effect on us

(a) Leptin __________________________________________________

(b) Ghrelin __________________________________________________

(c) Cortisol __________________________________________________

(d) brain neurotransmitters ___________________________________________

What are the special properties of neurones.

Which of the following sentences is correct?

Which of the following hormones contain iodine and is required to initiate the metabolism of fat?

The smallest unit of a kidney which is responsible for removal of nitrogenous wastes from the blood is ___ .

Classify the following hormone as plant hormone (P) or animal hormone (A).

I. Progesterone

II. Thyroxine

III. Auxin

IV. Adrenaline

Sponges have a cell aggregate body plan with numerous pores all over their body. To which phylum do they belong?

Theory of chemical evolution was proposed by __________.

The fleshy outer part of the female reproductive system where the opening to the vagina is located is called

Statement 1: All human beings have common ancestry.

Statement 2: Human beings evolved from chimpanzees and chimpanzees in turn evolved from monkeys.



Comment on both the statements stated above.

The curvature of shoot due to auxins during phototrophic movements occurs ______________.

Which of the following are known as a phagocyte?

Which of the following organ is not an endocrine gland but produces hormones?

______________ are usually first responders to microbial infection.

What is a proper and easy defination of nasties????

How do you perform an onion peel experiment.

A trait in an offspring of sexually reproducing organisms is influenced by:

An example of a pteridophyte is

Match the following animals with their category of existence.

In the list of organisms given below, those which reproduce by the asexual method are :
(i) Banana (ii) Yak (iii) Yeast (iv) Amoeba

(a) (ii) and (iv)
(b) (i), (iii) and (iv)
(c) (i) and (iv)
(d) (ii), (iii) and (iv)

A gas was found to be released from ripe oranges which helped in the ripening of bananas when stored together. Identify the gas.

___________ helps in the upward movement of water from roots to the leaves in tall trees.

By studying the ratio of different isotopes of same element in a material we can know the age of

When a female child is born, her ovaries already contain thousands of immature eggs (or ova) contained to immature structures A. On maturing, A bursts open and an egg shoots out of the ovary in a process called B. The process B starts in the females at puberty and occurs again and again after a time period x. Before every occurrence of process B, the inner lining of the uterus becomes thick and soft with lots of blood vessels in it. When the egg cell gets fertilised by a sperm, then an event C occurs in the life of mature human female which lasts for time period y leading to the birth of a baby. If, however, the egg cell released by the ovary does not get a sperm to fuse with, then the thick and soft inner lining of the uterus breaks down and comes out of the female's body in an event called D. The occurrence of event D is controlled by chemical substances E.
(a) What is A?
(b) What is process B?
(c) What is the time period x?
(d) Name the event C.
(e) How much is the time period y?
(f) What is the name of process D?
(g) Name the chemical substances E.

Which among the following is not affected if right parietal lobe is damaged?