List of top Biology Questions

Presence of plants arranged into well defined vertical layers depending on their height can be seen best in :
Select the mismatch :
Frog's heart when taken out of the body continues to beat for some time.
Select the best option from the following statements:
  1. Frog is a poikilotherm
  2. Frog does not have any coronary circulation
  3. Heart is "myogenic" in nature 
  4. Heart is autoexcitable
Which statement is wrong for Krebs' cycle?
Coconut fruit is a
The genotypes of a Husband and Wife are IAIB and IAi. Among the blood types of their children, how many different genotypes and phenotypes are possible?
Viroids differ from viruses in having :
Which ecosystem has the maximum biomass?
Which one of the following is related to Ex-situ conservation of threatened animals and plants?
A dioecious flowering plant prevents both:
Which among these is the correct combination of aquatic mammals?
Mycorrhizae are the example of
The process of separation and purification of expressed protein before marketing is called
Transplantation of tissues/organs fails often due to non-acceptance by the patient's body. Which type of immune-response is responsible for such rejections?
Functional megaspore in an angiosperm develops into
Asymptote in a logistic growth curve is obtained when
A gene whose expression helps to identify transformed cell is known as
Out of 'X' pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation :
Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?
Root hairs develop from the region of
In case of poriferans the spongocoel is lined with flagellated cells called:
The pivot joint between atlas and axis is a type of
A temporary endocrine gland in the human body is
Life cycle of Ectocarpus and Fucus respectively are
Which of the following RNAs should be most abundant in animal cell?