List of top Biology Questions

Following table summarises the comparisons between phyllodades and cladodes (cladophylls). Pick up the wrong differences and select the correct option,

What type of pollination takes place in Vallisneria?

Which of the following ecological pyramids is generally inverted ?

In pteridophytes, main plant body is a , which is into true roots, stem and leaves. Fill the blanks in above statement and select the correct option.

How does steroid hormone influence the cellular activities?

A selectable marker is used to:

Crossing over takes place between which chromatids and in which stage of the cell cycle ?

The two antibiotic resistance genes on vector pBR322 are for

Use of an artificial kidney during hemodialysis may result in : (a) Nitrogenous waste build-up in the body (b) Non-elimination of excess potassium ions (c) Reduced absorption of calcium ions from gastro-intestinal tract (d) Reduced RBC production Which of the following options is the most appropriate?

Consider the following statements i, ii and iii regarding criteria for essentiality of the nutrients in plants: i. The presence of elements is must for plants to complete their life cycle. ii. The role of the element can be replaced by another element. iii. The element must be directly involved in the metabolism of the plant. Choose the correct statement/s :

Match the following column I with column II.

Among the following, the narrow spectrum antibiotic is:

Cells in \(G_0\) phase:

What is the fate of the male gametes discharged in the synergid?

Pinus seed cannot germinate and establish without fungal association. This is because

Select the correct sequence for transport of sperm cells in male reproductive system.

Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?

Which of the following statements is incorrect?

Concanavalin A is:(1) an alkaloid (2) an essential oil (3) a lectin (4) a pigment

Which of the following pair of organelles does not contain DNA?

Select the correct group of biocontrol agents.

Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology?

Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?

From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in:

The correct sequence of phases of cell cycle is: