List of top Biology Questions

Draw a well-labelled diagram of the sectional view of a male gametophyte/microspore of an angiosperm and write the functions of any two parts labelled. (Any four labels).
Name any two hotspots in India.
Explain Brood parasitism with the help of a suitable example.
Study the graph given below that represents the changes in the thickening of the uterine wall in women ‘X’ and women ‘Y’ over a period of one month:
What does the graph with respect to women ‘X’ and woman ‘Y’ indicate? Give a suitable reason.
Name the group of drugs whose skeletal molecule is shown below:
Differentiate between grazing food chain and detritus food chain.
What is artificial insemination in ART? Under what conditions is the person medically advised to go for it?
Assertion (A): Some aquatic ecosystems have inverted biomass pyramids.
Reason (R): More energy is required by organisms occupying higher trophic levels.
Why does a patient of ADA-deficiency require repeated infusions of genetically engineered lymphocytes? Suggest a possible permanent remedy.
Assertion (A): A given fig species can be pollinated only by its partner wasp.
Reason (R): The wasp pollinates the fig inflorescence while searching for suitable egg-laying sites.
Assertion (A): Patents are granted by governments to an inventor.
Reason (R): Patents prevent others from commercial use of an invention.
Assertion (A): Plasmids are autonomously replicating circular extra-chromosomal DNA.
Reason (R): Plasmids are usually present in eukaryotic cells.
Which of the chromosome in a human possesses the least number of genes?
Identify the category of genetic disorder depicted in the pedigree chart given below:
The ‘molecular scissors’ fall in the category of:
Homologous organs indicate:
ELISA technique is based on the principle of:
In a fertilized ovule of an angiosperm, the cells in which n, 2n, and 3n conditions respectively occur are:
Select the option that gives the correct identification of ovum, morula, and blastocyst in a human female reproduction system as shown in the following diagram:
Turner’s syndrome in humans occurs due to:
Study the following diagram of Transverse Section of a young anther of an angiosperm:
Select the option where parts ‘A’, ‘B’ and ‘C’ are correctly identified.
Which of the options has correct identification of ‘P’, ‘Q’, and ‘R’ in the illustration of ‘Central Dogma’ given below?
A person with trisomy of 21st chromosome shows:
(i) Furrowed tongue
(ii) Characteristic palm crease
(iii) Rudimentary ovaries
(iv) Gynaecomastia
Select the correct option from the choices given below:

Observe the population growth curve and answer the questions given below: 
 

State the conditions under which growth curve ‘A’ and growth curve ‘B’ plotted in the graph are possible. 
 

Observe the population growth curve and answer the questions given below: 

 
Population growth curves showing exponential growth (A) and logistic growth (B).

Mention what does ‘K’ in the graph represent.