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In the given cross section of the seminiferous tubules, which of the labelled cells produce testosterone?

Movement of the chromatids towards the opposite poles of the cell is called:

Single cell protein refers to:

Match the names of plant hormones mentioned under column I, with the physiological effects listed under column II. Choose the answer which gives the correct combinations of the alphabets

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ & \text{Plant Hormones}& & \text{Physiological Effect}\\ A& \text{Gibberellin}& e& \text{Cell division}\\ B& \text{Auxin}& f& \text{Internodal elongation}\\ C& \text{Kinetin}& g& \text{Ripening of fruits}\\ D& \text{Ethylene}& h& \text{Abscission}\\ & & i& \text{Apical dominance}\end{array}$

The placenta is derived from

______ is classified under division Agnatha.

Which of the following is an oviparous mammal?

Which portion of the nephron extends into the medulla?

Which of the following statement is INCORRECT about the hormone melatonin?

Which of the following is not possible when the pneumotaxic centre is sending a strong signal?

Mitochondrial component connected with ATP synthesis is

Element playing important role in nitrogen fixation is

The ovule of an angiosperm is technically equivalent to :

What happens when the members of the same genus but different species interbreed?

The first step in genetic engineering is:

Meristematic cells are

The interior of a cow-dung pile kept for a few days is quite warm. This is mostly because

Wildlife is important because

Alveoli become enlarged and damaged with reduced surface area in heavy smokers. The condition is called

____________ are an ancient group of lower plants that contributed significantly in the creation of fossil fuels.

An example of axile placentation is

After tubectomy which part of the female reproductive system remains blocked?

Which of the following has an antrum?

Connell’s elegant field experiments on rocky sea coasts of Scotland is the evidence of

Match the following images with the respective given steps P,Q,R,S:

P. Macrophage receptors recognise the invading virus.

Q. The virus is drawn into the macrophage.

R. The virus get packaged into a sac pinched off from the cell membrane of the macrophage.

S. The sac fuses with lysozyme which safely dismantles the bacterium without digesting the macrophage itself.

Electrophoresis and Southern blotting techniques are used in

Match the disease in Column I with the appropriate items (pathogen/prevention/treatment) in Column II.

Column I Column II

(A) Amoebiasis (i) Treponema pallidum

(B) Diphtheria (ii) Use only sterilized food and water

(C) Cholera (iii) DPT vaccine

(D) Syphilis (iv) Use oral rehydration therapy

Amphetamines are CNS stimulants. Barbiturates are:

Terrestrial plants lose most of the water absorbed through __ from the leaves.

The micronutrient involved in nitrogen fixation is:

The central canal inside the spinal cord in the upper part, is continuous with the ______.

A group of students were researching unicellular, prokaryotic organisms that live in harsh environments such as volcanic hot springs, brine pools and anaerobic black organic mud. Which of these groups are the students most likely researching on?

An orchid growing as an epiphyte on a mango branch and barnacles growing on the back of a whale are examples of:

Genetic dwarfness in some plants may be solved by treatment with:

C4 plants, by decreasing photorespiration and efficiently carrying out photosynthesis, can?

The preservation of topsoil is important because

Which of the following statements are true in relation to addiction and dependence?

Cellulose is composed of:

Which element is obtained by plants in both gaseous and liquid form?