List of top Biology Questions

Which of the following is a living fossil?
How many mitotic divisions are needed for a single cell to make 128 cells?
Evolutionary convergence is characterised by
In human beings, the eggs are
Which of the following is free-living aerobic and non-photosynthetic nitrogen-fixing bacterium?
Viruses possess
The embryonated egg of Ascaris represents
Smooth muscle fibres are:
The smallest unit of classification is:
The secretory immunoglobulin present in the colostrum of mother is
Potato is included in solanaceae family because
Lamarck published his views on concepts of evolution in 1809 in his book:
To yield milk, cow is given
Presence of vestigial organs is in favour of which of the following theories?
Which of the following is the largest and edible bud?
Which of the following prevents the photo-oxidation and destruction of pigments ?
The genetic material of bacteria is present as:
The food in onion is stored in the form of:
Preparation of sperm before penetration of ovum is
How much amount of oxygen is present in one gram of haemoglobin?
Genes present on Y-chromosome are called
Biosphere is consist of:
Plasmids are single-stranded extra-chromosomal DNA. Plasmids are possessed by eukaryotic cells.
In the descending limb of loops of Henle, the urine is hypertonic, while in ascending limb of loops of Henle, the urine is hypotonic. Descending limb is impermeable to Na , while ascending limb is impermeable to HO.
Chloragogen cells of earthworm are similar to the vertebrate organ