Topic 4: Biodiversity and natural resources - Edexcel A-Level Biology B quiz

Cell, tissue and organ

Habitat, species and genetic

Producer, consumer and decomposer

Local, national and global

Evenness is far easier and quicker to measure in the field than species richness is

Richness simply cannot be counted at all, so evenness has to be used in its place

A community dominated by one species is less diverse than one spread evenly

Evenness counts only the rarest species in a community and ignores all the common ones

Species

Family

Kingdom

Genus

Similarities in DNA and protein sequences

The colour of organisms, since closely related species tend to share the same colours

The overall body size of organisms, since related species are usually of a similar size

The habitat an organism lives in, since related species usually share the same habitat

Natural selection itself

Mutation and meiosis

The conscious effort of individuals

Identical reproduction

Live together in the same habitat and continue to interbreed freely with one another

Come to share an identical set of alleles, so their two gene pools become the same

Become reproductively isolated and their gene pools diverge

Stop mutating altogether, so that no new genetic variation can ever arise in either

Pushed up from below by root pressure alone, with no role for the leaves at the top

Carried up through the living phloem cells alongside the sugars made in the leaves

Pumped upwards by contractions of specialised muscle tissue found within the xylem

Pulled up by transpiration, aided by cohesion and adhesion

Straight beta-glucose chains hydrogen-bond into microfibrils

They are made of highly branched chains of alpha-glucose, like the storage molecule starch

They contain large amounts of lipid, which binds the fibres tightly together for strength

They are made of single sugar molecules that pack closely together in a rigid lattice

Keeping species safely in zoos and in seed banks away from their natural surroundings

Protecting species in their natural habitat

Breeding species in captivity only, with no protection of any wild population at all

Storing seeds at low temperature in a controlled store for use at some point in future

Species have an inherent right to exist, quite apart from any usefulness to humans

Ecosystems should be kept stable so that natural processes continue to function well

Wild species provide food crops and medicines

Future generations should be able to see and enjoy wildlife just as we can today