Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
bacterial leaf blight of rice
downy mildew of grapes
loose smut of wheat
black rust of wheat
What is agent orange?
A biodegradable insecticide
A weedicide containing dioxin
Colour used in fluorescent lamp
A hazardous chemical used in luminous paints
Which one of the following is the correct statement regarding the particular psychotropic drug specified?
Hashish causes alter thought perceptions and hallucinations
Opium stimulates nervous system and causes hallucinations
Morphine leads to delusions and disturbed emotions
Barbiturates cause relaxation and temporary Euphoria
Two opposite forces operate in the growth and development of every population. One of them is related to the ability to reproduce at a given rate. The force opposing to it is called
Biotic control
Mortality
Fecundity
Environmental resistance
Which one of the following is being utilized as a source of bio-diesel in the Indian countryside?
euphorbia
beet root
sugarcane
pongamia.
In a random mating population in equilibrium, which of the following brings about a change in gene frequency in non-directional manner?
Selection
Migration
Mutation
Random drift
Given below are four methods (A-D) and their modes of action (1-4) in achieving contraception. Select their correct matching from the four options that follow
Method
Mode of Action
A.
B.
C.
D.
The pill
Condom
Vasectomy
Copper T
1.
2
.3
4
.
Prevents sperms reaching Cervix
Prevents implantation
Prevents ovulation
Semen contains no sperms
A B C D
3 1 4 2
4 1 2 3
3 4 1 2
2 3 1 4
Which of the following is non-symbiotic biofertilizer?
VAM
Azotobacter
Anabaena
Rhizobium
Which of the following pesticides is an acetyl cholinesterase inhibitor?
Aldrin
Y-BHC
Endosulfan
Malathion
Geometric representation of age structure is a characteristic of
Biotic community
Population
Landscape
Ecosystem
