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Explain photosynthesis with a diagram? Write the balanced equation for photosynthesis. Where are the raw materials obtained from? [5 MARKS]

The alkaloids found in the plant Madagascar Periwinkle is useful in curing

Which of the following is the main function of the hypophyseal portal system?

The term 'chromosome' literally means

___ are the substances required by an organism as food for body activities.

A lake with an inflow of domestic sewage rich in organic waste may result in:

Which bacteria is good for our health, especially in our digestive system .

The process that involves the expelling of urine from the urinary bladder is

Nutrition process in human beings

Which of the following base is not found in DNA?

What is the term given to the method when male gametes are introduced inside the female reproductive organ?

Tick mark $(\surd )$ the correct option in the following statements:

(a) The fossil history of humans is complete/ fragmentary.

(b) The first remarkable human fossil was that of H.habilis / H. africanus.

(c) Evolution is an ever continuing / promptly ending process.

Petioles of leaves are weakened leading to falling of leaves due to

An animal cell lacking nucleus would also lack in

Name the process that causes co2 to given out by the plant does this process occur only when it is dark.

Answer the following :
(a) What is the function of the lacrimal gland and where is it situated in the body?
(b) In what two ways is the yellow spot different from the blind spot?
(c) Name an old-age eye defect. What causes it?
(d) What is meant by power of accommodation of the eye?

(e) Mention the characteristics of the image that falls on the retina of the eye.

Pure-bred pea plants A are crossed with pure- bred pea plants B. It is found that the plants which look like A do not appear in $F_1$ generation but re-emerge in $F_2$ generation. Which of the plants A and B are : (i) tall, and (ii) dwarf ? Give reason for your answer.

Specific ions are acquired by root hairs against the concentration gradient by___________

Which of the following is not a part of female reproductive system in human beings?

Darwin's longest tour in the ___ and his observations in this area helped him arrive at his theory of "Natural selection".

India’s population growth during the 20^th century can be classified into four distinct phases. Match List-I (period) with List-II (Phase) and select the correct answer using the codes given below the list:

List I (Period) List II (Phase)

A. 1901-1921 1)Steady growth

B. 1921-1951 2) Rapid high growth

C. 1951-1981 3) Stagnant growth

D. 1981-2001 4) Hight growth with definite sign of slowdown

Assertion(A): Excess amount of calcium is regulated by calcitonin.
Reason(R): Calcitonin deposits excess calcium in the blood in bones.

Dihybrid ratio of Genotypic in F2 generation

Which of the following states has a low infant mortality rate?

What is photophosphorylation?

What is the connecting substance between light reaction and dark reaction?

__is the modification of the genetic information of living organisms by manipulation of DNA.

What is Lactobacilli?

Diabetes insipidus is a condition characterized by large amounts of dilute urine and

Thyroid secretes two hormones : thyroxine and ...................

Earth soil cannot store more nitrogen than it presently holds. Hence earth soil is referred to be in a state of _________.

Gap present between the terminal branches of axon of one neuron and the dendrites of the next neuron.

Enter 2 words or less.

Name the following:
(a) Any one vein which starts with an organ and ends in another organ besides the heart.
(b) The kind of blood vessels which have no muscular walls.
(c) An artery which carries impure (deoxygenated) blood.
(d) The kind of blood cells which can squeeze out through the walls of one category of blood vessels.
(e) The smallest common blood vessels formed by the union of capillaries.
(f) The blood vessel which starts from capillaries and ends in capillaries.
(g) The case of the cardiac cycle in which the auricles contract.
(h) The valve present in between the chambers on the right side of the human heart.
(i) The phase of the cardiac cycle in which the ventricle get filled with blood from the atrium.
(j) The fluid found between the membrane of the heart.

DNA nucleotide is composed of ..............

One among the following advantage of hormonal feedback mechanism in the body. Select the most appropriate alternative:

A cell swells up when kept in

Which of these can be of the different colour for different human beings?

Which of the following is used to determine the rate of transpiration in plants?

What is accidental survival?

Fill in the following blanks with suitable words :
(a) Gums and resins are the ___products of plants.
(b) Bowman's capsule and tubule taken together make a___
(c) The organs which extract the nitrogenous wastes from the blood are___
(d) The extracellular fluid which always flows from body tissues to the heart is called___
(e) The blood cells make antibodies are_________ whereas ___blood cells help in respiration.

Name any two plants which are propagated by the method of cuttings.