NCERT Class 12 Biology Short Questions & Answers
3 It natality is balanced by mortality in a population at a given time, there will be a/an
Answer: zero population growth
5 Which one of the following combination would a sugarcane farmer look for in the sugarcane crop?
Answer: Thick stem, long intemodes, high sugar content and disease resistant.
8 Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because
Answer: nodes have meristematic cells
9 In E.coli, the lac operon gets switched on when
Answer: lactose is present and it binds to the », repressor.
10 There are various types of reproduction. The type of reproduction adopted by an organism depends on
Answer: the organism’s habitat, physiology, and genetic makeup