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🧬 Biology, NCEA

Years 11 to 13 · Read up first

10 questions. Get 8 right to earn 10 minutes. All 10 right = +5 bonus. They start easy and get harder as you go, so treat the first few as a warm-up. Every one you miss comes back with the answer and why.

1. Photosynthesis mainly takes place in which organelle?

RibosomeNucleusMitochondrionChloroplast

2. An ecosystem is best described as

only the non-living parts of an environmenta single species living alonea community of living things interacting with each other and their physical environmenta zoo or nature reserve

3. Homeostasis is best described as

the process of growth from birth to adulthoodthe exchange of gases in the lungsthe maintenance of a stable internal environment despite external changesthe breakdown of food in digestion

4. Which organelle is known as the powerhouse of the cell, producing most of its ATP?

MitochondriaNucleusRibosomeGolgi apparatus

5. Natural selection is best described as

individuals with advantageous traits are more likely to survive and reproduceall individuals in a population change during their lifetimemutations are planned to help a speciesspecies always evolve towards perfection

6. Mitosis produces

two cells with double the chromosome numberone large cellfour genetically different haploid cellstwo genetically identical diploid cells

7. In genetics, an allele that is expressed even when only one copy is present is called

homozygousdominantrecessiveco-dominant

8. A species' 'niche' refers to

its position in a food chain onlythe number of individuals in a populationthe exact geographic location it lives inthe role it plays and resources it uses within its habitat

9. Primary succession begins on

an existing field cleared of vegetationfarmland taken out of usebare rock or newly formed land with no soil, such as after a volcanic eruptiona forest after a small fire

10. A cross between two heterozygous parents (Aa x Aa) for a single gene gives what phenotype ratio in the offspring?

3 dominant : 1 recessive1 dominant : 1 recessive1:2:19:3:3:1

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