Biology — NDA General Ability Test PYQs

Which of the following properties of alveoli is/are helpful in gaseous exchange during respiration in human beings?
I. The epithelial lining of alveoli is very thin.
II. Elastic fibres are present in alveolar wall.
III. Wall of alveoli is surrounded by many blood capillaries.
Select the correct answer using the code given below.

In which one of the following groups of animals, oestrus cycle is not observed?

Which one of the following tissues in plants is usually without protoplast and regarded as dead cells?

In which cell does the first meiotic cell division take place during the process of spermatogenesis?

Consider the following statements in respect of cell and its structure :
I. All cells possess cell wall.
II. All cells have ribosomes present inside.
III. All cells have well-organized nucleus.
IV. All cells have linear DNA molecules present in them.
Which of the statements given above is/are correct?

Which part of the plant or flower contributes in the form of false fruit like apple?

In which of the following parts of organisms, the process of gaseous exchange during respiration does not take place?

Which one of the following parts of an ovule possesses reserve food?

Which one of the following respiratory volumes of human lung is the lowest?

Which one of the following valves guards the opening between the right ventricle and the pulmonary artery?