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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. Natural selection is best described as

species always evolve towards perfectionall individuals in a population change during their lifetimemutations are planned to help a speciesindividuals with advantageous traits are more likely to survive and reproduce

2. Homeostasis is best described as

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

3. Which organelle contains the cell's genetic material (DNA)?

MitochondriaNucleusChloroplastVacuole

4. Diffusion is the movement of particles from an area of

high concentration to high concentrationlow concentration to high concentrationhigh concentration to low concentrationlow pressure to low pressure

5. Variation within a population, which natural selection acts on, is originally caused by

mutations and sexual reproduction (shuffling of alleles)environmental changes aloneidentical copying of DNAthe age of individuals

6. DNA replication is described as 'semi-conservative' because each new DNA molecule contains

two completely new strandsone original (old) strand and one newly made strandhalf of one gene and half of anothertwo original strands

7. During transcription, which molecule is produced from a DNA template?

mRNAtRNAA proteinA new DNA strand

8. Osmosis is specifically the movement of

glucose into cells using carrier proteinswater against its concentration gradient using energyany solute across a membranewater across a partially permeable membrane, from high to low water concentration

9. Photosynthesis and aerobic respiration are often described as opposite processes because

they both release energy as their main purposethe products of one (glucose and oxygen) are the reactants of the otherthey both happen only in animal cellsneither process involves gas exchange

10. A cell's rough endoplasmic reticulum looks 'rough' under a microscope because it is studded with which organelle?

MitochondriaLysosomesRibosomesCentrioles

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