Zoology
Yellow fever is transmitted by:
A.
Mosquito
B.
Housefly
C.
Bedbug
D.
Sandfly
Pyrilla perpusilla is a major pest of:
A.
Rice
B.
Wheat
C.
Potato
D.
Sugarcane
Forensic scientist have to work often with extremely small samples of DNA obtained from the hair or other sources of suspected criminals. However, it is possible to produce DNA "finger print" from these small samples by using:
A.
Polymerase chain reaction
B.
Genetically engineered microorganisms
C.
Gene cloning
D.
Gene 'gun'
Which one of the following is not a pest of cotton plants?
A.
Easina insulana
B.
Dysdercus konigii
C.
Heliothis armigera
D.
Tribolium confusum
Cantharidine is obtained from:
A.
Apis indica
B.
Lepisma
C.
Ltyla vesicatoria
D.
Blatta orientalis
Which of the following groups comprises of socail insects?
A.
Honey bees, Termites, lac insects
B.
Grasshoppers, Ants, Honeybees
C.
Ants, Wasps, Silkmoths
D.
Ants, Termites, Honeybees
Sewage, garbage and organic materials dumped into the water bodies will kill fishes because of an:
A.
Increase in bacterial activity and therefore increase in toxic substances
B.
Increase in bacterial activity and therefore decrease in oxygen content of water bodies
C.
Decrease in bacterial activity due to shortage of oxygen
D.
Increase in bacterial activity due to incraese in carbon dioxide content
Biotransformation refers to:
A.
The gradual changes taking place in the biosphere
B.
The chemical processes carried out by enzymes to detoxify many unwanted byproducts of industry
C.
themselves to environmental demands
D.
The changes in the biotic factors influenced by abiotic factors in an ecosystem
Minamata epidemic in Japan was caused due to the pollution caused by:
A.
Mercury
B.
Lead
C.
Nickel
D.
Uranium
Cyclomorphosis is Daphnia is mainly influenced by:
A.
Light
B.
Temperature
C.
Salinity
D.
pH
The term which denotes the specific positions of a species in a community is:
A.
Ecologoical pyramids
B.
Ecological succession
C.
Ecological niche
D.
Hierarchy
In ecology, population means:
A.
Human beings living in a particular ecosystem
B.
Individuals of a species living at a given time
C.
Groups of an organisms of all species inhabiting a particualr area at a given time
D.
Groups of an organisms of a species inhabiting a particular area at a given time
Environmental units which afford uniform environmental conditions to the inhabiting species are called:
A.
Ecotypes
B.
Isotypes
C.
Biotypes
D.
Biotopes
In commensalism the:
A.
Population of commensal is increased while that of the host remains unaffected
B.
Population of commensal and the host remains unaffected
C.
Population of both commensal and host increases
D.
Population of commensal increases, while the population of the host decreases
Atavistic characters are:
A.
Characters which have remained unaltered since the origin of a species
B.
Characters which have disappeared totally
C.
Characters which have normally disappeared in advanced forms but occurs occasionally
D.
Characters which have developed in advanced forms but are occasionally found absent due to mutation
Which of the following organs of man is not a vestigial organs?
A.
Vermiform Appendix
B.
Wisdom Teeth
C.
Ear ossicles
D.
Nicitating membrane
Horses appeared in:
A.
Miocene
B.
Pliocene
C.
Eocene
D.
Oligocene
Which of the following was the era of reptiles?
A.
Palaezoic
B.
Coenozoic
C.
Mesozoic
D.
Proterozoic
Which one of the following statements about circadian rhythm is correct?
A.
Circadian rhythm, dependent on endogenous clock , is restricted to birds and mammals
B.
An animal's circadian rhythm is not exactly 24 hours
C.
The period of circadian rhythm is not exactly 24 hours.
D.
Circadian rhythm is necessary because the earth is tilted on its axis
Which of the following statements is not true?
A.
The development of amnion and chorion occurs after gastrulation and neurulation
B.
Amnion and Chorion are formed by the folds of somatopleure
C.
The chorionic will increase the absorptive area of chorion
D.
In mammals the allantois acts as a urinary bladder
An insecticide, applied to the stem, root, leaves or seeds of the plants, is absorbed and reaches different parts of the plants, ingests the poison through its sucking mechanism.Such a poison is termed as:
A.
Fumigant
B.
Contact poison
C.
Respiratory poison
D.
Systemic poison
If hen's egg is coated with clay:
A.
It become unbreakable
B.
It withstands environmenatl conditions
C.
The young one dies of suffocation
D.
The young one is better protected
In frog, the first skeletal part to become differentiated is:
A.
Slylopodium
B.
Zengopodium
C.
Autopodium
D.
Metacarpals
In frog, the liver is derived from:
A.
Ectoderm
B.
Endoderm
C.
Mesoderm
D.
Mesoendoderm
Gastrula is the stage in embryonic development of frog when:
A.
Embryo has three primary germ layers
B.
Embryo has ectodrem, endodrem and a blastopore
C.
Embryo has ectodrem, endodrem, mesoderm and rudimentary nervous system
D.
Embryo has rudimentary nervous system