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Choose the correct course of human evolution:

Chemically hormones are _____.

Union Government has unveiled National Biotechnology Development Strategy (NBDS) 2015-2020 to establish India as a world-class bio-manufacturing hub. Consider the following statements:

Which of the above statement(s) is/are correct?

Give a brief description of the process of synthesis of food in green plants. [3 MARKS]

The tiny pores from which leaves take up carbon dioxide from the atmosphere are known as___

Ozone at the higher levels of the atmosphere is a product of UV radiation acting on the _______ molecules.

The full form of IUCN is___

I am a muscular organ as big as your fist. Who am I?__.

The carbohydrate synthesized in the leaves are transported through sieve tubes most commonly in the form of________.

What are interneurons ? Explain their location and function.

Differences between acrocentric and telocentric chromosome

Which of the following statements are wrong?
(i) Mass flow of substances inside the plant is the result of pressure differences between the two points.
(ii) Diffusion cannot account for long distance movement of water and solutes in plants.
(iii) Movement through apoplast does not involve crossing the cell membrane.

The following diagram represents the vertical sectional view of the human female reproductive system.

(a) Label the parts indicated by the guidelines 1 to 8.

(b) How does the uterus prepare for the reception of zygote?

(c) What happens to the uterus, if fertilisation fails to take place?

Which among the following animals has two chambered heart?

Question 3 (i)
Population of Rajasthan = 570 lakhs, population of UP= 1660 lakhs.
Area of Rajasthan = 3 lakh $k{m}^2$ and area of UP = 2 lakh $k{m}^2$
How many people are there in per $k{m}^2$ in both these states?

What is excretion? What is/are the source/s of waste material? [2 MARKS]

The pollutants released from air conditioners and refrigerators affect:

What is a prokaryotic cell?

Which of the following are the 2 phases of walking?

Name the two types of transport systems in the human beings.

Which of the following is/are ductless gland(s)?

"Digestion of food begins in the mouth"- explain this statement by providing which secretion and enzyme are responsible for digestion.

Genetics is the branch of science which deals with the study of _______.

Water moves up against gravity and even for a tree of 20 m height, the tip receives water within two hours.The most important physiological phenomenon which is responsible for the upward movement of water is

The first sound of the heart beat occurs during 1______, associated with the closure of 2_______, and 3______, The second sound of the heart beat occurs during 4_____, associated with the closure of 5______, and 6______.

Sex of a foetus depends on the:

Continuous addition of sugar in ‘fed-batch’ fermentation is done to:

What could be the possible explanation for the evolution of four-chambered heart in mammals as opposed to two-chambered heart in fishes?

Is it correct to say that the testes produce testosterone. Discuss?

Oxygen-rich blood from the lungs comes to the thin-walled upper chamber of the heart on the left called ___.

Deficiency of which of the following hormones causes goitre?

To
what effect has the poet used these devices? How has it added to your
understanding of the subject of the poem? You may record your
understanding of snake characteristics under the following headings:

(a)
Sound

(b)
Movement

(c)
Shape

Give scientific reasons:

(1) In sexual mode of reproduction greater diversities are generated.

(2) Phenotypic and genotypic ratios are different.

(3) In human beings the gametes from the male parent decides the sex of the baby.

(4) Paleontological evidence suggests that invertebrates came into existence before the vertebrates.

Which method is mismatchen ART

A) .IVF

B.) AFT

C.) ZIFT

D.) GIFT

Why is iodine as a nutrient, important to our body ?

Select the substrates for salivary amylase from the following:

Identify the correct sequence of phases during karyokinesis:

When hypocotyl elongates and rises above the ground, it is called ___.

What is double fertilisation?

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