List of top Biology Questions

An artificial pacemaker is implanted subcutaneously and connected to the heart in patients
Which of the following statements is correct regarding menstrual cycle?
Documented microfossils have been found that are as old as
Some salient features and phyla of organisms are given below. Select the option which shows correct combination of organism, its phylum and salient features.
The water logging capacity of garden soil will be determined by measuring the weight of
The process where a population inhibits the growth of other population without affecting itself is known as
The figure shows different human tissues labelled as A to D. Which option gives the correct identification of the label, its location and one feature?
Identify the incorrect statement about ABA growth regulator.
Match the tissues/molecules mentioned in column I with those of their degrading enzymes mentioned in column II and select the correct option from the given codes. $\quad$$\quad$Column I$\quad$$\quad$$\quad$ $\quad$Column II A. $\quad$Cell wall$\quad$$\quad$$\quad$ (i) $\quad$Proteases B. $\quad$RNA $\quad$$\quad$$\quad$$\quad$ (ii) $\quad$Pectinases C. $\quad$Histone $\quad$$\quad$$\quad$(iii) $\quad$Ribonucleases D. $\quad$Pectin$\quad$$\quad$$\quad$$\quad$ (iv) $\quad$Cellulase
When plants/animals are infected with virus, they may produce an anti-viral substance that is capable of inhibiting the multiplication of that virus. Identify the correct name of this substance.
Select the correct statement regarding reproduction.
Which of the following is not a factor that would limit the growth of a population?
A large quantity of urban sewage is drained into nearby village river. Which among the given conditions would happen after mixing of sewage into the river? (i) $\quad$Biochemical oxygen demand (BOD) of receiving water body increases. (ii)$\quad$ Dissolved oxygen of receiving water body decreases. (iii) $\quad$It will not cause mortality among fishes and other aquatic creatures. (iv) $\quad$It will lead to nutrient enrichment of receiving water body.
Select the option that correctly matches characteristic features with the group of three animals.
Which technique is used for the test tube baby program?
Which insect is useful for us?
Spore bearing leaf is called
In mammals which organ acts as blood bank ?
Hygroscopic roots are found in :
Hydra can not digest :
Epinasty movement is found in :
Dinosaurs disappeared during :
Imbibtion is a :
A molecule of ATP is structurally similar to a molecule of :
Hydathodes are meant for :