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Consider the diagram below which represents photosynthetic reactions. Choose the option that correctly matches the names to the labels (i), (ii), (iii). Also, the option must match for the involvement of chlorophyll in - (a) Light reaction or (b) Calvin-Benson Cycle.

What is the function of the pollen tube ? Explain it with the help of a diagram.

Guard cells help in regulating the rate of ________.

A particular species of which one of the following, is the source bacterium of the antibiotic, discovered next to penicillin, for the treatment of tuberculosis ?

(a) Escherichia (b) Streptomyces
(c) Rhizobium (d) Nitrobacter

Colocasia is a type of __________.

What differs within a DNA molecule?

Fossils fuels and metallic minerals are___resources.

Second most abundant component inside the cell is

Plants which bear naked seeds are

Which animal phylum is commonly called as flatworms?

What are methods for preventing soil erosion?

Which of the following is/are method(s) used to prevent food decay?

Consider the diagram given below. Parts labeled as (a), (b), (c), (d) and (e) respectively indicate

What is known as fermentation?
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The voice box which is responsible for the production of sound in humans is also called as ________.

Osteoporosis, an age-related disease of the skeletal system may occur due to

What are the functions of paranchyma tissue and how it is responsible for exchange of gases. Where are they found

Which one of the following nutrients is not available in fertilizers?

Snail moves with the help of a ______ .

The proportion of carbon dioxide in the atmosphere is about _______ .

If crops are stored for a long time, they have to be protected from:

The transfer of oxygen and other gases between air in the lungs and blood vessels takes place at

Which of the following occur(s) in grana?

The loose connective tissue that can store fat and act as a thermoregulator in mammals is____

Which one of the following is true of the pentoses found in nucleic acids?

What kind of movements do macrophages in the human body show?

Bidder’s canal is found in

Main role of minor elements is to act as

Match the following columns related to nitrogen cycle
$\begin{array}{cc}\text{Column - I}& \text{Column - II}\\ \text{A. Nitrogen fixation}& \text{1.Conversion of}N{H}_3\text{to}N{O}_3^{-}\\ \text{B. Nitrogen assimilation}& \text{2.Conversion of}N{O}_3^{-}\text{or}N{H}_3\text{to organic nitrogen}\\ \text{C. Ammonification}& \text{3.Conversion of}N{O}_3^{-}\text{to atmospheric nitrogen}\\ \text{D. Nitrification}& \text{4.Conversion of}{N}_{2}toN{O}_3^{-}\text{or}N{H}_3\\ \text{E. Denitrification}& \text{5.Conversion of organic nitrogen to}N{H}_3\end{array}$

Assertion(A): Iodine diet is essential for proper body functioning in man.

Reason(R): Iodine helps in the formation of thyroxin which regulates overall metabolism of the body.

Write down four main characters of Bryophyta. Give two examples.

Which of the following type of flower arrangments limit the growth of height of the plant?

What do you mean by the term triploblastic animals? Give two examples.

What is the function of vessels in a xylem

What is the significance of cell division?

The chief pollinating agent for maize plants is___.

By the time a child is six or seven she has all the essential avoidances well enough by heart to be trusted with the care of a younger child. And she also develops a number of simple techniques. She learns to weave firm square balls from palm leaves, to make pinwheels of palm leaves or frangipani blossoms, to climb a coconut tree by walking up the trunk on flexible little feet, to break open a coconut with one firm well-directed blow of a knife as long as she is tall, to play a number of group games and sing the songs which go with them, to tidy the house by picking up the litter on the stony floor, to bring water from the sea, to spread out the copra to dry and to help gather it in when rain threatens, to go to a neighboring house and bring back a lighted faggot for the chief's pipe or the cook-house fire. But in the case of the little girls all these tasks are merely supplementary to the main business of baby-tending. Very small boys also have some care of the younger children, but at eight or nine years of age they are usually relieved of it. Whatever rough edges have not been smoothed off by this responsibility for younger children are worn off by their contact with older boys. For little boys are admitted to interesting and important activities only so long as their behavior is circumspect and helpful. Where small girls are brusquely pushed aside, small boys will be patiently tolerated and they become adept at making themselves useful. The four or five little boys who all wish to assist at the important, business of helping a grown youth lasso reef eels, organize themselves into a highly efficient working team; one boy holds the bait, another holds an extra lasso, others poke eagerly about in holes in the reef looking for prey, while still another tucks the captured eels into his lavalava. The small girls, burdened with heavy babies or the care of little staggerers who are too small to adventure on the reef, discouraged by the hostility of the small boys and the scorn of the older ones, have little opportunity for learning the more adventurous forms of work and play. So while the little boys first undergo the chastening effects of baby-tending and then have many opportunities to learn effective cooperation under the supervision of older boys, the girls' education is less comprehensive. They have a high standard of individual responsibility, but the community provides them with no lessons in cooperation with one another. This is particularly apparent in the activities of young people: the boys organize quickly; the girls waste hours in bickering, innocent of any technique for quick and efficient cooperation.

The primary purpose of the passage with reference to the society under discussion is to-

Why does any nucleotide of a gene changes it's position that causes a minor change?

Why do our underarm smell? Is this because of sweat or the bacteria living in our underarm