Competition And Environmental Change

Question 1

What do animals need to survive and reproduce?

Answer 1

SPACE (TERRITORY), FOOD, WATER AND MATES

Question 2

What do organisms compete with other species for?

Answer 2

FOR THE SAME RESOURCES

Question 3

Why is the population of red squirrels decreasing?

Answer 3

BECAUSE COMPETITION WITH THE GREY SQUIRRELS FOR THE RESOURCES MEANS THERE’S NOT ENOUGH FOOD FOR THE REDS

Question 4

The environment in which plants and animals live changes all the time. These changes are caused by living and non-living factors.

What are the LIVING factors?

Answer 4

1. A CHANGE IN THE OCCURRENCE OF INFECTIOUS DISEASES
2. A CHANGE IN THE NUMBER OF PREDATORS
3. A CHANGE IN THE NUMBER OF PREY OR THE AVAILABILITY OF FOOD SOURCES
4. A CHANGE IN THE NUMBER OR TYPES OF COMPETITORS

Question 5

Environmental changes can affect animals and plants in what three ways?

Answer 5

1. POPULATION SIZE INCREASES
2. POPULATION SIZE DECREASES
3. POPULATION DISTRIBUTION CHANGED

Question 6

The environment in which plants and animals live changes all the time. These changes are caused by living and non-living factors.

What are the NON-LIVING factors?

Answer 6

1. A CHANGE IN THE AVERAGE TEMPERATURE
2. A CHANGE IN AVERAGE RAINFALL
3. A CHANGE IN THE LEVEL OF AIR OR WATER POLLUTION

Question 7

The number of bees in the US is falling rapidly. Experts aren’t too sure why, but they think it could be because of what?

Answer 7

1. SOME PESTICIDES MAY BE HAVING A NEGATIVE EFFECT ON THE BEES
2. THERE’S LESS FOOD AVAILABLE - THERE’S NOT AS MANY NECTAR-RICH PLANTS ANYMORE
3. THERES MORE DISEASE, BEES ARE BEING KILLED BY NEW PATHOGENS OR PARASITES

Question 8

What do plants need in order to survive?

Answer 8

LIGHT, SPACE, WATER AND MINERALS (NUTRIENTS) FROM THE SOIL