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Biology: Middle School: Grades 6, 7 and 8 Quiz - Adaptations for Survival (Questions)

This Biology quiz is called 'Adaptations for Survival' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.

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For an organism to be successful, it needs to be well adapted. Adaptations for survival are the ways in which an organism is suited to life in a particular environment or habitat. These adaptations can be characteristics, behavior or both. Organisms that are perfectly adapted to a particular way of life in a habitat will change little over long periods of time, unless something changes.

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Slow changes in organisms are made through natural selection. In any population of plants or animals, genetic mutations will occur. Badly (or not so well) adapted mutations are less likely to survive and breed but well adapted mutations will do both. The new characteristics that make them better adapted than their competitors are therefore passed on to their offspring.

Natural selection and adaptation through inherited characteristics occurs slowly but behavioral adaptations can arise over much shorter time periods. Environmental and other changes may affect the behavior and distribution of living organisms causing significant changes in populations - plants not suited to the new conditions will die and animals will either die or move elswhere. Population size depends on factors including competition, predation and human influences.

Test your knowledge of adaptations for survival by playing this quiz on the subject.

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How does camouflage help an animal to survive?

[ ]	Helps it to thermoregulate
[ ]	Ensures that it blends in with the surroundings
[ ]	Makes sure that the predator or prey cannot see it
[ ]	Helps to cool it down

How does a cactus avoid being eaten by animals?

[ ]	It has spikes which prevent water loss by evaporation
[ ]	It has a thick fleshy stem which stores water
[ ]	It has deep roots to absorb as much water as possible
[ ]	It has spikes which hurt the animal

In order to survive, plants need: light, space, nutrients, water and what else?

[ ]	Carbon dioxide
[ ]	Hydrogen
[ ]	Soil
[ ]	Glucose

Animals can display features similar to those of poisonous animals, to deter predators. What is this known as?

[ ]	Marquetry
[ ]	Mimicry
[ ]	Mockery
[ ]	Minimalism

Which of the following is a special adaptation for survival in desert plants?

[ ]	Larger surface area to volume ratio
[ ]	Reduced leaf surface area
[ ]	Thorns
[ ]	Increased number of stomata

Which of the following statements is true of extremophiles?

[ ]	Extremophiles are tolerant to high temperatures
[ ]	Extremophiles are intolerant to high pressure
[ ]	Extremophiles are tolerant to light intensity variations
[ ]	Extremophiles are intolerant to low salt levels

Arctic animals have which adaptation to allow survival?

[ ]	Brown fur in the summer and white fur in the winter for camouflage
[ ]	Thick layer of fat so they can survive hibernation
[ ]	Small eyes and ears to keep out the cold
[ ]	Ability to swim faster than their prey

Microorganisms have to compete with each other for which of the following?

[ ]	A mate
[ ]	CO₂
[ ]	Light
[ ]	Nutrients

Which one of the following resources is the least likely to be a limiting factor for plants?

[ ]	Water
[ ]	Carbon dioxide
[ ]	Light intensity
[ ]	Temperature

10.

Animals compete with each other for which of the following resources?

[ ]	A habitat
[ ]	A territory
[ ]	An ecosystem
[ ]	An adaptation

Biology: Middle School: Grades 6, 7 and 8 Quiz - Adaptations for Survival (Answers)

How does camouflage help an animal to survive?

[ ]	Helps it to thermoregulate
[ ]	Ensures that it blends in with the surroundings
[x]	Makes sure that the predator or prey cannot see it
[ ]	Helps to cool it down

It is important for survival that the predator and prey find it hard to see each other

How does a cactus avoid being eaten by animals?

[ ]	It has spikes which prevent water loss by evaporation
[ ]	It has a thick fleshy stem which stores water
[ ]	It has deep roots to absorb as much water as possible
[x]	It has spikes which hurt the animal

Cacti avoid being eaten by having sharp spines which deter animals from coming near

In order to survive, plants need: light, space, nutrients, water and what else?

[x]	Carbon dioxide
[ ]	Hydrogen
[ ]	Soil
[ ]	Glucose

Carbon dioxide is a resource for which plants don't compete

Animals can display features similar to those of poisonous animals, to deter predators. What is this known as?

[ ]	Marquetry
[x]	Mimicry
[ ]	Mockery
[ ]	Minimalism

Often animals with the markings of poisonous animals will be less likely to be eaten by predators, thus increasing their chances of survival

Which of the following is a special adaptation for survival in desert plants?

[ ]	Larger surface area to volume ratio
[x]	Reduced leaf surface area
[ ]	Thorns
[ ]	Increased number of stomata

This helps them to conserve water. Having a larger surface area to volume ratio or an increased number of stomata would have the opposite effect. Thorns are not an adaptation that is special to desert plants, they occur in a other climate zones and habitats. The most common desert plants studied for the middle school are cacti, which develop spines (adapted leaves) and not thorns (adapted branches)

Which of the following statements is true of extremophiles?

[x]	Extremophiles are tolerant to high temperatures
[ ]	Extremophiles are intolerant to high pressure
[ ]	Extremophiles are tolerant to light intensity variations
[ ]	Extremophiles are intolerant to low salt levels

They are also tolerant to other extremes such as high or low pH

Arctic animals have which adaptation to allow survival?

[ ]	Brown fur in the summer and white fur in the winter for camouflage
[x]	Thick layer of fat so they can survive hibernation
[ ]	Small eyes and ears to keep out the cold
[ ]	Ability to swim faster than their prey

The layer of fat also helps to insulate their bodies against the extreme cold

Microorganisms have to compete with each other for which of the following?

[ ]	A mate
[ ]	CO₂
[ ]	Light
[x]	Nutrients

Bacteria reproduce rapidly and can adapt to new conditions in a few generations

Which one of the following resources is the least likely to be a limiting factor for plants?

[ ]	Water
[x]	Carbon dioxide
[ ]	Light intensity
[ ]	Temperature

Growth is controlled by the scarcest resource so if there is light and water but the temperature is low, growth would be limited. The same works for the other two factors but there is always more than enough carbon dioxide in the air for plants as air is a gas and is constantly circulating

10.

Animals compete with each other for which of the following resources?

[ ]	A habitat
[x]	A territory
[ ]	An ecosystem
[ ]	An adaptation

Competition can lead to changes in behavior or characteristics