Unit 19 - Organisms And Their Environments

Question 1

What is the main source of energy for biological systems?

Answer 1

Sunlight

Question 2

What does a food chain show?

Answer 2

A food chain shows feeding relationship between organisms

Question 3

What is a producer?

Answer 3

Producers provide energy for consumers and decomposers

Question 4

What is a consumer?

Answer 4

Consumers are the organisms that get their energy from eating other organisms

Question 5

What are decomposers?

Answer 5

Decomposers are fungi and bacteria that gain their energy form waste organic material

Question 6

How does energy loss occur?

Answer 6

Energy losses occur between trophic levels as a result of respiration

Question 7

What is a population?

Answer 7

A population is a group of individuals of the same species that live in the same habitat

Question 8

Factors that affect the rate of growth of a population?

Answer 8

Availability of food
Disease
Access to healthcare

Question 9

Why has there been an increase in the population?

Answer 9

Improved agriculture
Access to healthcare
Public health
Fewer children die

Question 10

What social implications does a growing population create?

Answer 10

Demands of food supplies
Housing
Energy needs