Ch 8 key terms

Question 1

population

Answer 1

In biology, a population is a number of all the organisms of the same group or species who live in a particular geographical area and are capable of interbreeding.

Question 2

density

Answer 2

Density, mass of a unit volume of a material substance. … Density offers a convenient means of obtaining the mass of a body from its volume or vice versa; the mass is equal to the volume multiplied by the density (M = Vd), while the volume is equal to the mass divided by the density

Question 3

dispersion

Answer 3

The pattern of distribution of individuals within a habitat.

Question 4

growth rate

Answer 4

The annual average rate of change of population size, for a given country, territory, or geographic area, during a specified period. … It expresses the ratio between the annual increase in the population size and the total population for that year, usually multiplied by 100.

Question 5

reproductive potential

Answer 5

Reproductive Potential. the rate at which a species can increase it’s population. Limiting Factor. any biotic or abiotic factor that acts in some way to limit the number of individuals that survive and reproduce in a population.

Question 6

exponential growth

Answer 6

Growth whose rate becomes ever more rapid in proportion to the growing total number or size.

Question 7

carrying capacity

Answer 7

The number of people, other living organisms, or crops that a region can support without environmental degradation.

Question 8

niche

Answer 8

In ecology, the term “niche” describes the role an organism plays in a community. A species’ niche encompasses both the physical and environmental conditions it requires (like temperature or terrain) and the interactions it has with other species (like predation or competition).

Question 9

competition

Answer 9

Competition is an interaction between organisms or species in which both the organisms or species are harmed. Limited supply of at least one resource (such as food, water, and territory) used by both can be a factor.

Question 10

predation

Answer 10

Predation is a biological interaction where one organism, the predator, kills and eats another organism, its prey. It is one of a family of common feeding behaviours that includes parasitism and micropredation and parasitoidism.

Question 11

parasitism

Answer 11

Parasitism is a symbiotic relationship between species, where one organism, the parasite, lives on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The entomologist

Question 12

mutalism

Answer 12

Mutualism describes the ecological interaction between two or more species where each species has a net benefit. Mutualism is a common type of ecological interaction.

Question 13

commensalism

Answer 13

Commensalism is a long-term biological interaction in which members of one species gain benefits while those of the other species neither benefit nor are harmed

Question 14

symbiosis

Answer 14

Symbiosis is any type of a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasitic. The organisms, each termed a symbiont, must be of different species.