A plant growth promoter got from fungi is ___________

(a)

Rennet

(b)

Gibberellin

(c)

Ergot

(d)

Griseofulvin

___________ are considered as pollution indicators.

(a)

Mycorrhiza

(b)

Actinomycete

(c)

Lichens

(d)

Cyanobacteria

Living thing is otherwise called as ___________

(a)

Organ

(b)

Organelle

(c)

Organism

(d)

Cell

Organisms grow by __________

(a)

cell division

(b)

spore formation

(c)

fragmentation

(d)

vegetative propagation

Earth was formed _______________ billion years ago.

(a)

4.6

(b)

5.5

(c)

4

(d)

3

_________________ are obligate aerobes.

(a)

Streptococcus

(b)

Clostridium

(c)

Micrococcus

(d)

E. Coli

Which one of the following is a rod-shaped bacteria?

(a)

Coccus

(b)

Bacillus

(c)

Spirillum

(d)

Vibrio

Food poisoning is caused by ______________

(a)

Yersinia

(b)

Clostridium

(c)

Treponema

(d)

Vibrio

Nitrogen fixation in non leguminous plants is done by __________________

(a)

Rhizobium

(b)

Alnus

(c)

Frankia

(d)

Streptomyces

Which of the following is the diameter of bacteriophage?

(a)

10 - 100 nm

(b)

20 - 100 nm

(c)

10 - 200 nm

(d)

20 - 30 nm

Each virus posses only one type of nucleic acid:

(a)

Either DNA or RNA

(b)

DNA only

(c)

Neither DNA nor RNA

(d)

RNA only

Definite nucleus and membrane bound organelles are present _________.

(a)

Eukaryotes

(b)

Prokaryotes

(c)

Bacteria 

(d)

Virus

Asexual reproduction occurs through budding ___________.

(a)

Hydra and Yeast

(b)

Bacteria and Amoeba

(c)

Mosses

(d)

Planaria

The wood formed in spring season in called ____________

(a)

Hard wood

(b)

Soft wood

(c)

Early wood

(d)

Non porous wood

Living part of the wood is called __________

(a)

Duramen 

(b)

Heart wood

(c)

Porous wood

(d)

Sap wood

Gymnosperm wood is known as _______________

(a)

non porous wood

(b)

hard wood

(c)

porous wood

(d)

sap wood

Identify the character which is found in Autumn wood.

(a)

produces large number of xylem elements.

(b)

vessels have wide lumen

(c)

wood is darker in colour

(d)

cambium is very active

Canada balsam is obtained from _________

(a)

Abies

(b)

Haematoxylin

(c)

Quercus

(d)

Cinchona

Which of the following is a part of Radial system.

(a)

sieve tubes

(b)

companion cells

(c)

phloem rays

(d)

phloem parenchyma

According to cytochrome pump theory the anions and cations are transported by _____________

(a)

active absorption

(b)

passive absorption

(c)

active and passive absorption respectively

(d)

passive and active absorption respectively

In pure water Osmotic potential is ___________

(a)

equal to solute potential

(b)

zero

(c)

less than solute potential

(d)

decreases with increase of solutes

The theory of K⁺ transport to explain stomatal opening was proposed by ____________

(a)

Steward

(b)

Levit

(c)

Hanes

(d)

Lloyd

__________ is not linked to protein - lecithin theory.

(a)

phosphatidic acid

(b)

ATP4

(c)

Choline

(d)

Dehydrogenase

________ is a mineral required  greatest  amount by plants.

(a)

P

(b)

K

(c)

N

(d)

Mg

A free living anaerobic Nitrogen fixing bacteria __________

(a)

Azolla

(b)

Klebsiella

(c)

Clostridium

(d)

Frankia