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Uses of protozoa.

Name the gland which regulates the secretion of hormones from the male and female gonads. Also, mention the function of male and female sex hormones. [3 MARKS]

Name the publication which contains record of all the endangered species (plants and animals, etc.).

A reduction in the quantity of oxygen evolution during photosynthesis may be observed at

The largest cell is that of an:

(a) State three differences between a plant cell and an animal cell.
(b) Which of the following are prokaryotic cells and which are eukaryotic cells ?
Amoeba cell, Bacterium cell, Human cheek cell, Blue-green cell, Onion peel cell.

HIV can be transmitted through which of the following:

What is pseudopodia? What is its function? Where are these structures seen?
[3 MARKS]

Question 11

Choose the odd one out from below with respect to reproduction.
(a) Eggs of hen.
(b) Seeds of plants.
(c) Buds of potato.
(d) Roots of mango tree.

The egg cell or the female gamete lies within

Which of the folloing is correct about pheromone traps?

Find the correct match of both the columns:

Column A Column B

i) Brewing a) Microbial decomposition of wastes

ii) Antibiotics b) Prevention of cholera, TB and hepatitis

iii) Manures c) Streptomycin and tetracycline

iv) Vaccines d) Alcohol and wine

Which organ pumps blood throughout the human body?

Fish liver oil is rich in :

A. Vitamin A B. Vitamin B C. Vitamin C D. Vitamin D

(a) A and B (b) B and C (c) A and D (d) only D

There are some plants that grow along with the crops in a field which are usually removed by farmers. What are these plants called?

Pollen grain has ______ nucleus/nuclei.

When you touch something hot, you spontaneously remove your fingers, without even thinking. Which of the following tissue is involved in identifying the external stimuli and then responds by removing the fingers?

The human reproductive system includes

what are probiotic food?

What happens when the blood of other person gets mixed with blood of another person. Then why doesn't the blood have two DNA one of the donater and other who get donation.

What are agricultural implements ?

Pimples and acne are fomed due to the increased activity of :

A. Adrenal glands B. Sebaceous glands C. Thyroid gland D. Sweat glands

(a) A and B (b) B and C (c) A and C (d) B and D

Which of the following statements is true for lymph?

When fungi feed on dead organic matter, they are known as

Doforestation increases the level of one of the following in the atmosphere. This one is:

(a) ozone
(b) carbon dioxide
(c) oxygen
(d) water vapour

The biggest example of human migration leading to a pattern of extinction of other animals can be seen when humans colonised Madagascar. Which of the following species became extinct as a result?

Which of the two spreads dengue : mosquito or housefly ?

What is dispersal of seeds and pollination

How are metabolic wastes, $C{O}_2$ and urea of a baby excreted during pregnancy?

Out of solids liquids and gases which has least diffusion

The muscular layer present in the wall of the heart is called as__________

The blood vessel that supplies blood to the heart is known as __.

The hormones secreted by the thyroid gland are

The protruding part of the throat in boys is called ___ .

What is a plastid ? What is the name of green plastids present in plant cells ?

_____________ is called the living substance of the cell.