Ques:Q: A biofilm is a colony of what that is stuck to a surface such as a rock or a host's tissues? Read this paragraph and choose the correct option from the provided answers: Many prokaryotes have an extra layer, called a capsule, outside the cell wall. The capsule protects the cell from chemicals and drying out. It also allows the cell to stick to surfaces and to other cells. Because of this, many prokaryotes can form biofilms, like the one shown in Figure below . A biofilm is a colony of prokaryotes that is stuck to a surface such as a rock or a host's tissues. The sticky plaque that collects on your teeth between brushings is a biofilm. It consists of millions of bacteria. Choices: - insects - eukaryotes - vacuoles - prokaryotes A:

Ans:prokaryotes
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Ques:Q: What happens to a species when all of the individuals die out or evolve into a different species? Read this paragraph and choose the correct option from the provided answers: Species go extinct when all of the individuals die out or evolve into a different species. Choices: - accumulation - selection - depletion - extinction A:

Ans:extinction
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Ques:Q: People with red hair usually have what type of skin? Read this paragraph and choose the correct option from the provided answers: 7. People with red hair usually have very light skin. What might be a genetic explanation for this observation?. Choices: - dark - oily - dry - light A:

Ans:light
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Ques:Q: What is a sac-like organ at the end of the esophagus? Read this paragraph and choose the correct option from the provided answers: The stomach is a sac-like organ at the end of the esophagus. It has thick muscular walls that contract and relax to squeeze and mix food. This helps break the food into smaller pieces. It also helps mix the food with enzymes and other secretions in the stomach. For example, the stomach secretes the enzyme pepsin, which helps digest proteins. Choices: - appendix - larynx - spleen - the stomach A:

Ans:
the stomach
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