1.ง่าย
Which piece of equipment gives the most precise measurement of a liquid volume?
- AA graduated cylinder
- BA beaker
- CA test tube
- DA Petri dish
2.ง่าย
What is an antigen?
- AA white blood cell that engulfs and digests bacteria
- BA drug that kills viruses
- CA molecule that the immune system sees as foreign
- DA protein that carries oxygen
3.ง่าย
What are stomata?
- AGreen structures in the leaf that store starch
- BHairs on roots that absorb minerals
- CTubes that carry water up the stem
- DSmall pores in leaves that allow gas exchange
4.ปานกลาง
What do the spindle fibres do during cell division?
- AThey copy the DNA of each chromosome before the cell divides
- BThey attach to chromosomes and move them to the poles
- CThey make the new nuclear envelope
- DThey digest the old cell membrane
5.ปานกลาง
What is a bacterial endospore?
- AA reproductive cell that bacteria use to make new colonies quickly
- BA hair-like structure used to swim towards food
- CA small ring of DNA that carries antibiotic resistance genes
- DA tough, dormant form that survives heat, drying and many disinfectants
6.ปานกลาง
Salivary amylase begins the digestion of which nutrient in the mouth?
- ACellulose
- BProtein
- CStarch
- DFat
7.ยาก
Fertiliser washes from farmland into a lake. Algae grow rapidly, then die, and later many fish die. What is the main cause of the fish deaths?
- AThe fertiliser is directly poisonous to fish
- BThe algae release carbon dioxide that poisons fish
- CBacteria decomposing the dead algae use up the oxygen
- DThe fish eat too many algae and become ill
8.ยาก
A person's body temperature starts to fall in a cold room. Which responses help bring it back up?
- AShivering and narrowing of blood vessels in the skin
- BFaster breathing and more urine production
- CSlower heart rate and less muscle activity
- DSweating and widening of blood vessels in the skin
เฉลย
- 1. A · A graduated cylinder
- 2. C · A molecule that the immune system sees as foreign
- 3. D · Small pores in leaves that allow gas exchange
- 4. B · They attach to chromosomes and move them to the poles
- 5. D · A tough, dormant form that survives heat, drying and many disinfectants
- 6. C · Starch
- 7. C · Bacteria decomposing the dead algae use up the oxygen
- 8. A · Shivering and narrowing of blood vessels in the skin
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