List of top Biology Questions

A species facing extremely high risk of extinction in the immediate future is called:
The organization which publishes the Red List of species is:
Archaebacteria differ from eubacteria in:
Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly cut coleoptile stumps. What significance is this experiment of?
Select the option which is not correct with respect to enzyme action:
The enzyme recombinase is required at which stage of meiosis?
During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C?
Which one of the following fungi contains hallucinogens?
An alga which can be employed as food for human being is :
Choose the correctly matched pair:
Stimulation of a muscle fibre by a motor neuron occurs at
Which one of the following is wrong about Chara?
Match the following and select the correct option:
(a)Earthworm(i)Pioneer species
(b)Succession(ii)Detritivore
(c)Ecosystem service(iii)Natality
(d)Population growth(iv)Pollination
Which of the following causes an increase in sodium reabsorption in the distal convoluted tubule?
Select the correct matching of the type of the joint with the example in human skeletal system:
The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as:
A human female with Turner's syndrome:
Deficiency symptoms of nitrogen and potassium are visible first in:
To obtain virus-free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken?
Identify the hormone with its correct matching of source and function:
Fight-or-flight reactions cause activation of:
Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks.
Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem
Which one of the following statements is not correct?
A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white-coloured like albinos. Which of the following terms will you use to describe them?
The osmotic expansion of a cell kept in water is chiefly regulated by: