Group 7

Question 1

amensalism

Answer 1

Amensalism occurs when one species is inhibited or killed, while the other species is unaffected. e.g. sheep on grass

Question 2

commensalism

Answer 2

Commensalism occurs when one species benefits, and the other neither benefits, or is harmed

Question 3

mutualism

Answer 3

Mutualism occurs when both species benefit

Question 4

competition

Answer 4

When two species use the same resources, they are said to compete and their interaction

Question 5

parasitism

Answer 5

one organism feeds on/lives on another species. typically host is bigger than parasite. parasites usually do not kill host (weaken them) e.g fleas on dogs

Question 6

predation

Answer 6

one organism feeds upon the other. predator usually bigger than prey

Question 7

biotic and abiotic factors

Answer 7

Abiotic factors are those parts of the environment that are non living. examples are sunlight, temperature, rainfall, latitude, altitude and soil type.
The Biotic factors of the environment are those that are living. They can be divided into the main groups of producers, consumers, decomposers and detritivores.

Question 8

Species, populations, communities, niche definitions and examples.

Answer 8

Organism/species
Ex. an elephant
Population
A group of individuals in the same species, living and interacting in one area
Ex. a herd of elephants in the Serengeti
Community
Multiple populations interacting in one area
Ex. grazing antelope, elephants and giraffes in the Serengeti
niche includes all of the species’ requirements plus its role in the ecosystem. It is determined by all the the abiotic and biotic factors relevant to the species.

Question 9

Distribution and abundance of species and populations

Answer 9

Distribution: Geographic area where individuals of a species occur. Abundance: Number of individuals in a given area.

Question 10

(trophic level)

Answer 10

Plants and Algae. 
Primary Consumers. ..
Secondary Consumers. ...
Tertiary Consumers. ...
Apex Predators.