4a - Ecology

Question 1

Define ecology:

Answer 1

the study of an organism’s environment and factors that determine their distribution and abundance in that environment

Question 2

Define population:

Answer 2

all organisms of one species living in a habitat

Question 3

Define community:

Answer 3

all the populations of different species living in a habitat

Question 4

Define habitat:

Answer 4

the place where living organisms live

Question 5

Define ecosystem:

Answer 5

all of the living organisms in an area and their environment interacting together

Question 6

What are 4 biotic factors that affect population size?

Answer 6

• availability of food
• predators
• pathogens
• competition for food, water, whelter

Question 7

What are 8 abiotic factors that affect population size?

Answer 7

• light intensity
• moisture levels
• temperature
• oxygen levels
• pH of soil or water
• availability of minerals
• carbon dioxide levels