Question 1

Phenomena such as photoperiodism are called proximate factors. This means that they

Accepted Answer

A)  trigger an organism to initiate an adaptive response. 
B)  are a response to an environmental signal. 
C)  are a response to seasonal stress. 
D)  are genetically predetermined. 
E)  initiate responses in nearby organisms. 
A)  trigger an organism to initiate an adaptive response. 
B)  are a response to an environmental signal. 
C)  are a response to seasonal stress. 
D)  are genetically predetermined. 
E)  initiate responses in nearby organisms.

Question 2

A small mammal is found to have a reduced response to breathing stimuli such as low oxygen, partial pressure and high CO2 levels. In addition, it also has a relatively low body temperature and metabolic rate. As such, this animal almost certainly spends a significant amount of its time in what kind of environment?

Accepted Answer

A)  Aarid or semi-arid 
B)  Thick undergrowth 
C)  Underground burrow 
D)  Fresh water 
E)  Grasslands 
A)  Aarid or semi-arid 
B)  Thick undergrowth 
C)  Underground burrow 
D)  Fresh water 
E)  Grasslands

Question 3

Which of the following statements regarding birds and mammals at high altitudes is false?

Accepted Answer

A)  The embryos have lower haemoglobin concentrations than embryos at sea level. 
B)  Bird eggs are smaller than eggs at sea level. 
C)  The overall diffusive conductance of bird eggs is similar to eggs at sea level. 
D)  The hatching of bird eggs is restricted. 
E)  Their muscles contain a higher concentration of myoglobin than the animals at sea level. 
A)  The embryos have lower haemoglobin concentrations than embryos at sea level. 
B)  Bird eggs are smaller than eggs at sea level. 
C)  The overall diffusive conductance of bird eggs is similar to eggs at sea level. 
D)  The hatching of bird eggs is restricted. 
E)  Their muscles contain a higher concentration of myoglobin than the animals at sea level.

Question 4

Eurytherms

Accepted Answer

A)  are thermoregulating animals. 
B)  have widely variable body temperatures. 
C)  need to expend considerable energy maintaining thermal homeostasis. 
D)  is biochemically advantageous to physiological processes. 
E)  are able to occupy diverse environments. 
A)  are thermoregulating animals. 
B)  have widely variable body temperatures. 
C)  need to expend considerable energy maintaining thermal homeostasis. 
D)  is biochemically advantageous to physiological processes. 
E)  are able to occupy diverse environments.

Question 5

How do African and South American lungfish cope with the extreme environmental stress associated with the complete desiccation of the ponds they typically live in?

Accepted Answer

A)  They burrow down into the mud, produce a cocoon of mucus and remain inactive until environmental conditions become favourable. 
B)  They die. 
C)  They have swim bladders that can adapt to act as a crude lung, allowing them to travel overland to the nearest body of fresh water. 
D)  They dry out completely and remain on the pond floor as a dry husk, but regain activity when moisture returns. 
E)  They excrete a small, toughened spore with an extremely tough and desiccation resistant outer layer that lies dormant until water returns to the pond, thus regenerating a juvenile lungfish from the spore. 
A)  They burrow down into the mud, produce a cocoon of mucus and remain inactive until environmental conditions become favourable. 
B)  They die. 
C)  They have swim bladders that can adapt to act as a crude lung, allowing them to travel overland to the nearest body of fresh water. 
D)  They dry out completely and remain on the pond floor as a dry husk, but regain activity when moisture returns. 
E)  They excrete a small, toughened spore with an extremely tough and desiccation resistant outer layer that lies dormant until water returns to the pond, thus regenerating a juvenile lungfish from the spore.

Exam 25: Metabolism, Temperature Regulation and Environmental Stress

Phenomena such as photoperiodism are called proximate factors. This means that they

Which of the following statements regarding birds and mammals at high altitudes is false?

Eurytherms

How do African and South American lungfish cope with the extreme environmental stress associated with the complete desiccation of the ponds they typically live in?

Nature of Molecules

Biomolecules

The Chemistry of Life

Functioning Cells

Movement Across Membranes

Harvesting Energy

Cells, Tissues and Signals

Cell Division

Inheritance

Genes, Chromosomes and Dna

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Gene Expression

Genomes, Mutation and Cancer

Viruses

Genetic Engineering and Biotechnology

Reproduction, Growth and Development of Flowering Plants

Structure of Plants

Plant Nutrition, Transport and Adaptation to Stress

Plant Hormones and Growth Responses

Animal Reproduction

Animal Development

Homeostasis: Water, Solutes and Excretion

Gas Exchange in Animals

Circulation

Animal and Human Nutrition

Innate Defences and the Immune System

Hormonal Control in Animals

Nervous Systems

Animal Movement

Animal Behaviour

Evolving Life

Evolving Earth

Mechanisms of Evolution

Bacteria

The Protists

Plants

Fungi

Simple Animals: Sponges to Flatworms

Annelids, Molluscs, Nematodes and Arthropods

Echinoderms and Chordates

Australian Biota

Population Ecology

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Human Impacts

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