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

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

193.

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

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

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

Interbreeding population of animals is called :

• sub-species

• species

• community

• genus

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

Which of the following statements regarding responses of organisms to abiotic factors is false?

• All birds and mammals are capable of thermoregulation.

• Majority of animals and nearly all plants cannot maintain a constant internal environment.

• Shivering is a kind of exercise which produces heat and raises body temperature.

• Very small animals are commonly found in polar regions as they have to spend less energy to generate body heat

• Very small animals are commonly found in polar regions as they have to spend less energy to generate body heat

An orchid growing as an epiphyte on a mango tree is an example for

• Parasitism

• Predation

• Commensalism

• Mutualism

• Mutualism