Five Kingdom system of classification suggested by RH Whittaker is not based on

• presence or absence of a well-defined nucleus

• mode of reproduction

• Mode of nutrition

• Mode of nutrition

Archaebacteria differ from eubacteria in

• cell membrane structure

• mode of nutrition

• cell shape

• cell shape

Which of the following is responsible for peat formation?

• Marchantia

• Riccia

• Funaria

• Funaria

Tracheids differ from other treachery elements

• having Casparian strips

• being imperforate

• lacking nucleus

• lacking nucleus

Which structures perform the function of mitochondria in bacteria?

• Nucleoid

• Ribosomes

• Cell wall

• Cell wall

An example of edible underground stem is

• carrot

• groundnut

• sweet potato

• sweet potato

The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as

• microtubules

• microfilaments

• intermediate filaments

• intermediate filaments

During which phase (s0 of the cell cycle, the amount of DNA in a cell remains at the 4C level if the initial amount is denoted as 2C?

• G_o and G₁

• G₁ and S

• Only G₂

• Only G₂

Match the following and select the correct answer.

• A	B	C	D
  4	3	1	2

• A	B	C	D
  1	2	4	3

• A	B	C	D
  1	3	2	4

• A	B	C	D
  1	3	2	4

Dr F went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly cut coleoptile stumps. Of what significance is this experiment?

• It made possible the isolation and exact identification of auxin

• It is the basis for quantitative determination of small amounts of growth - promoting substances

• It supports the hypothesis that IAA is auxin

• It supports the hypothesis that IAA is auxin