Instruction: Answer all questions in this section.

1. In cellular respiration, glucose is oxidized to produce:
(a) water
(b) food
(c) energy
(d) water

2. Which of the following is not present in the nucleus of a cell?
(a) Chromosome
(b) Mitochondrion
(c) Gene
(d) Nucleolus

3. Euglena moves by:
(a) whipping action of flagellum
(b) beating of its cilia
(c) pushing out a jet of water
(d) rolling action of flagellum

4. The organelle which eliminates water from the body of protozoa is:
(a) plasma membrane
(b) contractile vacuole
(c) cell wall
(d) cytosol

5. In which of the following tissues will osmosis occur?
(a) Boiled and peeled yam
(b) Raw and peeled yam
(c) Boiled and unpeeled yam
(d) Boiled and cooked yam

6. Spirogyra is regarded as a multi-cellular plant because:
(a) the cylindrical cells are linked end to end
(b) its cells are linked together by cytoplasmic strands
(c) its cells are large
(d) because the cells are void in shape

7. Which of the following organisms is one-celled and free-living?
(a) Volvox
(b) Spirogyra
(c) Chlamydomonas
(d) Sponges

Cellular respiration occurs in eukaryotic cell mitochondria, while prokaryotes have adaptations for energy production. Cellular respiration and photosynthesis differ in processes and products. The carbon-oxygen cycle links producers and consumers through oxygen and carbon dioxide exchange.

Explanation:

Eukaryotic Cell Organelle for Cellular Respiration and Prokaryotes

Cellular respiration takes place primarily in the mitochondria of eukaryotic cells. While prokaryotes lack mitochondria, they can still carry out parts of cellular respiration in their cytoplasm, showing adaptations for energy production.

Comparison: Cellular Respiration and Photosynthesis

Cellular respiration involves the breakdown of glucose to generate ATP, releasing energy and carbon dioxide. In contrast, photosynthesis uses light to produce glucose, oxygen, and store energy.

Carbon-Oxygen Cycle

The carbon-oxygen cycle connects producers and consumers through the exchange of oxygen and carbon dioxide. Producers release oxygen as a byproduct, which is used by consumers for respiration.

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