2.5 Metabolism and adverse conditions

To survive very cold conditions an animal, for example an arctic fox would have?

• A large surface area to volume ratio

• Large ears with a dense blood supply

• A round compact body shape

• A very thin layer of fat underneath the skin

Which of the following correctly describes aestivation?

• Avoiding metabolic adversity by expending energy to relocate to a more suitable environment

• A period of reduced activity in organisms with high metabolic rates

• A form of dormancy employed by some animals to survive periods of excessive heat and drought.

• A form of dormancy that enables some animals to survive the adverse conditions of winter.

A short term physiological state in which the metabolic rate and body temperature of mammals are both lowered at night is called?

• hibernation

• aestivation

• torpor

• adaptation

In autumn, a deciduous tree sheds its leaves and enters a dormant phase. This state is described as?

• predictive and the plants metabolic rate increases

• consequential and the plants metabolic rate increases

• predictive and the plants metabolic rate decreases

• consequential and the plants metabolic rate decreases

Three features of an animal awakening from hibernation are indicated in the following table. Which line is correct?

• A

• B

• C

• D

A hummingbird undergoes a period of torpor every night because?

• its metabolic rate is so high it would become exhausted without rest

• its natural habitat is cold both daytime and night

• it feeds on nectar from flowers that close their petals at night

• Its relative surface area is so large that it would lose too much heat

Dormancy is a method of surviving adverse conditions. Which feature is common to all forms of dormancy?

• Lowered Metabolism

• Conserving Energy

• Increase Metabolism

• Energy Wasted

Which group of animals is hibernation most commonly associated with?

• Mammals

• Amphibians

• Reptiles

• Fish

What factor is hibernation a response to?

• Lack of nutrients

• Lack of sunlight

• Lack of food

• Lack of space

Name the type of dormancy which allows survival in periods of high temperature or drought.

• Dormancy

• Hibernation

• Daily Torpor

• Aestivation