PCBl 3044l Finall Examl Latestl 2026l 2027l

PCBl 3044l Finall Examl (Latestl 2026/l 2027l Update)l Guide|l 100%l Verifiedl Questionsl &l Answersl |l Gradel A

Q:l Whatl arel thel stepsl ofl thel carbonl cycle?

Answer:

1.l Photosynthesis 2.l Respiration 3.l Exchange 4.l Sedimentationl andl burial 5.l Extraction 6.l Combustion

Q:l Whatl arel thel stepsl ofl thel nitrogenl cycle?

Answer:

1.l Nitrogenl fixation 2.l Nitrification 3.l Assimilation 4.l Ammonification 5.l Denitrification

Q:l Whyl isl decompositionl important?

Answer:

Thel decompositionl ofl materialsl isl howl mostl nutrientsl enterl al system.

Q:l Whatl influencesl thel ratesl ofl decomposition?

Answer:

Temperature,l moisture,l andl ratiol ofl carbon:nitrogen. 1 / 3

Q:l Howl canl microbesl alterl nutrientsl andl makel theml morel orl lessl availablel forl use?

Answer:

Nitrogenl fixationl -l bacterial inl thel rootsl ofl certainl plantsl willl createl al usablel forml ofl nitrogen.

Q:l Whatl controlsl nutrientl cyclingl inl anl ecosystem?

Answer:

Decomposition/Ratel ofl decomposition.

Q:l Describel thel conceptl ofl nutrientl cyclingl inl movingl waters.

Answer:

Upwellingl -l nutrientsl froml lowerl inl thel waterl columnl isl cycledl tol thel top.

Q:l Bel ablel tol describel eutrophicationl andl differentiatel betweenl anthropogenicl andl naturall causes.

Answer:

Eutrophicationl byl anthropogenicl meansl isl al dumpl ofl nutrientsl intol al waterl bodyl whichl eventuallyl causesl harmfull algall bloomsl Naturallyl eutrophicl lakesl justl havel highl nutrients.

Q:l Whyl arel seasonall lakel turnoverl andl upwellingl sol importantl tol nutrientl suppliesl inl thel systemsl thatl thesel thingsl happenl in?

Answer:

Thisl isl howl nutrientsl isl cycledl inl thesel systems.

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Q:l Examplel ofl al flagshipl species.

Answer:

Al typel ofl surrogatel species;l launchingl conservationl usingl al "mascot"l speciesl suchl asl al pantherl orl alligator.

Q:l Examplel ofl anl umbrellal species.

Answer:

Al typel ofl surrogatel species;l oftenl thisl species'l rolel inl anl ecosysteml protectsl otherl speciesl suchl asl gopherl tortoisesl orl wolves.

Q:l Examplel ofl al focall species.

Answer:

Pickingl al focusl speciesl forl thel goall ofl protectingl al specificl habitat;l suchl asl gorillasl forl protectingl rainforestsl inl generall orl dolphinsl andl whalesl forl thel oceanl inl general.

Q:l Endemicl species.

Answer:

Somethingl thatl canl onlyl survivel inl al single,l highlyl specificl location.

Q:l Nativel species.

Answer:

Speciesl thatl normallyl livel andl thrivel inl al particularl ecosystem.

Q:l Invasivel species.

Answer:

Al species,l oftenl introducedl byl humans,l thatl takesl holdl outsidel itsl nativel range.

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