List of top Biology Questions asked in AIIMS

Endothecium layer of anther wall plays an important role in dehiscence of anther. The presence of fibrous bands and differential expansion of inner and outer tangential walls of endothecial cells cause dehiscence of anther.

Consciousness is considered as the defining property of living organisms. All organisms, from the prokaryotes to the most complex eukaryotes can sense and respond to environmental stimuli.

Atmospheric nitrogen gas is always fixed by nitrogen-fixing micro-organisms. Decomposers release nitrogen gas from dead bodies of plants and animals.

Pseudostratified epithelium is found in

Cornea transplant in humans is almost never rejected. This is because

Which of the following is used as bioinsecticide?

Match column I with column II and select the correct option from the codes given below.

Select the incorrect match.

A plasmolysed cell can be deplasmolysed by placing it in

Which of the following is the correct scientific name of wheat derived by binominal nomenclature?

Which one of the following human organs is called the 'graveyard of RBCs?

Which of the following groups of algae produces algin?

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : Liver is the largest gland of the body. The hepatic lobules are the structural and functional units of liver containing hepatic cells arranged in the form of cords.

Reason (R) : Each lobule of the liver is covered by a thin connective tissue sheath called the Glisson's capsule. The bile is secreted by hepatic cells.

In the light of the above statements, choose the correct answer from the options given below

The relationship between osmotic pressure at $273\, K$ when $10\, g$ glucose $(p_1), \,10\, g$ urea $(p_2)$ and $10\, g$ sucrose $(p_3)$ are dissolved in $250\, mL$ of water, is

The first carbon dioxide fixation product of C plants is

Mature RBCs lose their ability for

Cestoda are distinguished from other flatworms by the absence of

A small rise in the body temperature of humans is corrected by (i) sweating (ii) dilating the skin arteries (iii) constricting the skin arteries (iv) increased tension of muscles in the skin.

Which of the following waste products in grasshopper is not excreted and is used in other metabolic activities?

Which organism is used to transfer T-DNA?

Which part of the nephrons is impermeable to water?

Primary endosperm nucleus (PEN) is formed by the fusion of

Hiccups can be best described as

Carbon dioxide is necessary for photosynthesis. The chemical used to remove this gas most effectively from entering a control apparatus is