Biology

Question 1

Ecology

Answer 1

The study of ecosystems in the environment

Question 2

Stable community

Answer 2

All species and environmental factors are in balance, population size remains constant

Question 3

Niche

Answer 3

The role of a species in an ecosystem

Question 4

Community

Answer 4

The collection of different populations of species all co-existing in the same habitat at one tome

Question 5

Population

Answer 5

All organism of the same species living in a habitat at one time

Question 6

Ecosystem

Answer 6

A biological community of interacting organisms and their physical environment

Question 7

Interdependence

Answer 7

The relationship between different organisms within the same community and their dependence on each other for survival

Question 8

Abiotic factors
Biotic factors

Answer 8

Sunlight, temp, water, gases, parasites

New predators, competition for resources, availability of food, disease

Question 9

Measuring population rise of a common species in a habitat using random sampling

Answer 9

Measure 20 x 20 area
Divide this into grids and adding each square a number
Use random number generator to randomly choose a place to place the Quadrat
Count number of organisms in Quadrat
Take temp and LUX levels
Repeats 3-5 9 more times
Calculate mean number
Divide 20 x 20 into the size of the Quadrat, multiply this number with your mean number

Question 10

Why can’t you place the Quadrat wherever?

Answer 10

Not representative of whole area, must be random

Question 11

Investigating distribution of species as environment changes using systematic sampling

Answer 11

Lay out 20 m tape 90° from path
Place Quadrat at 0m and count data
Move along and repeat twice more (to discard anomalies)
Measure LUX and temp
Move 5m along and repeat 3 & 4
Get a mean number for every 5m away and see your results

Question 12

Independent variable
Dependant variable
Control variable

Answer 12

We change
We measure
Stays the same

Question 13

Equation for photosynthesis

Answer 13

CO2 + 6H2O —> C6H12O6 + 6O2

Question 14

Biomass

Answer 14

Amount of biological material in an organism

Question 15

Producers
Primary consumers
Secondary consumer
Tertiary consumers
Decomposers

Answer 15

• organisms that make food from new material like CO2 and water (plants and algae)
• eat producers
• eat primary consumer
• eat secondary consumer
• microorganisms that break down dead bodies and waste products