IB Biology Option C key terms

Define community.

• group of organisms living and interacting with each other in an area

• group of populations living and interacting with each other in an area

• group of organisms living and interacting with each other in an area at the same time

• abiotic and biotic factors that affect a population

Which of the following represents the actual mode of existence in which a species can be found?

• ecological niche

• fundamental niche

• realised niche

• zone of intolerance

Identify the key term shown in the graph.

• realised niche

• competitive exclusion

• zone of intolerance

• mutualism

Define commensalism

• the interaction between two organisms where one benefits and the other neither benefits nor is harmed.

• the interaction of two species where one (the parasite) feeds on and derives benefit from the other (the host) which consequently suffers.

• the interaction of two species where both benefit.

• the interaction between two living organisms where one catches, kills and eats the other.

Define trophic level

• show the energy being passed from one organism to another

• the position an organism occupies in a food chain

• the position a population occupies in a food chain

• the position an organism occupies in a mesocosm

define homeotherm

• an animal which maintains a regulated body temperature through physiological mechanisms.

• an animal which has a variable body temperature according to the surrounding environment

• an animal that can live within a wider zone of intolerance

• maintaining a constant internal environment

Which of the following is an acceptable unit for energy in a food chain?

• J m^-2 yr^-1

• J m^-2 yr²

• J² m^-2 yr^-1

• J m^-2 min^-1

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Identify the key term being described by the sequence of events: bare rock, colonised by pioneer species, topsoil layer created, grasses grow and displace pioneer species, shrub growth, soil depth promotes tree growth

• succession

• primary succession

• secondary succession

• fundamental niche

Which of these is the total amount of organic matter produced by plants in an ecosystem?

• gross production

• net production

• feed conversion ratio

• realised niche

the total dry mass of organic matter in organisms or ecosystems.

• biomass

• zone of intolerance

• biome

• trophic level