OCR AS Biology 2

Welcome to your OCR AS Biology 2

1. A plant cell in a photograph measures 25 mm across. If the actual size of the cell is 0.025 mm, what is the magnification in the photograph?
2. Select the incorrect sentence out of the following.
3. The lungs are in the _________ surrounded by the ___________ which enclose an airtight space.
4. What is the respiratory organ of a fish?
5. How does gas exchange take place within alveoli?
6. The accepted theory of how eukaryotic cells evolved from prokaryotic cells.
7. If a specimen appeared 20mm in length under a microscope with a magnification of 1,000 times, what is the calculation of the actual length?
8. How do some varieties of rice respond to flooding?
9. Select the incorrect statement regarding gaseous exchange.

a) Amoeba has a large surface area to volume ratio.
b) Amoeba takes in oxygen by diffusion across the body surface.
c) An elephant has a smaller surface area to volume ratio when compared to an amoeba.
d) Elephants have special respiratory organs such as the lungs.
10. A similarity between transmission electron microscope and scanning electron microscope.
11. Select the incorrect statement from the following.
12. Which of the following is not correctly paired?
13. Which of the following is found in plant cells but not in bacteria?
14. The gas exchange surface in a human being.
15. The protective protein coat in a virus.
16. Select the incorrect statement from the following.
17. Choose the correct statement(s).

a) Animal cells are eukaryotic cells.
b) Vacuole is a fluid filled organelle.
c) Lysosomes are the digesters of prokaryotic cells.
d) Bacteria are living organisms.
18. Select the incorrect statement out of the following.
19. Select the incorrect statement about alveoli.