The resting state of reptiles in winter is
hibernation
aestivation
diapause
moulting
A.
hibernation
Hibernation is a state of inactivity and metabolic depression in mammals to escape cold weather and food shortage over the winter.
Aestivation is also a state of animal dormancy in which invertebrate and veriebrate animals enter to avoid damage from high temperatures.
Diapause is a predictive strategy that is predetermined by an animals genotype. It is common in insects, mammals, etc.
Moulting is a process in which an animal routinely casts off a part of its body, either at specific times of the year or at specific points in its life cycle.
On high mountains, difficulty in breathing is due to :
decrease in partial pressure of O2
decrease in amount of O2
increase in CO2 conc
all of the above
Which of the following rule states that Avian and mammalian forms are generally of higher size in colder region as compared to warmer region'?
Bergmann's rule
Allen rule
Gloger rule
Hardy-Weinberg rule
Assertion : Lateral line system is found in fishes and aquatic larval amphibians.
Reason : Lateral line system has receptors which are the clusters of sensory cells derived from ectoderm.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both the assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both the assertion and reason are false.
Mutualism is found in
hermit crab and sea anemone
ox pecker and rhinoceros
zoochlorellae and Hydra
E.coli and man
Euryhaline species denotes an animal
without osmoregulation
which lives in saline water
which has a wide range of saline tolerance
which has a wide range of temperature tolerance
Given below is the survivorship curve of different population.
Which type of the curve has the highest chances of senescence affecting mortality?
Type I
Type I and II
Type III
Type I, II and III
Population means
all the animals of a place
all the animals and plants found in an area
human beings in an area
animal/plants of a species living in a specific area
Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following larval stages respectively
redia and miracidium
cercaria and redia
cercaria and metacercaria
miracidium and metacercaria
