ATI TEAS 7
TEAS 7 practice test free science
1. Which statement accurately describes cytokinesis in animal cells?
- A. Which statement accurately describes cytokinesis in animal cells?
- B. A cell plate forms in the center of the dividing cell, eventually separating the cytoplasm into two daughter cells.
- C. A cell plate forms in the center of the dividing cell, eventually separating the cytoplasm into two daughter cells.
- D. The nucleus elongates and pulls apart, physically dividing the cytoplasm into two.
Correct answer: B
Rationale: A) This statement is a duplicate of option C and does not accurately describe cytokinesis in animal cells. B) In animal cells, during cytokinesis, a cleavage furrow forms in the center of the dividing cell. This furrow deepens and eventually pinches the cytoplasm into two daughter cells. This process is distinct from plant cells, where a cell plate forms. C) This statement is a duplicate of option A and does not accurately describe cytokinesis in animal cells. D) This statement describes the process of nuclear division (mitosis) rather than cytokinesis, which is the division of the cytoplasm.
2. Which organ in the human body is the largest and is responsible for detoxification, metabolism, and storage of nutrients?
- A. Heart
- B. Liver
- C. Lungs
- D. Skin
Correct answer: B
Rationale: The liver is the largest internal organ in the human body and is responsible for detoxification, metabolism, storage of nutrients, and various other essential functions. It plays a critical role in maintaining overall health by processing nutrients, filtering blood, and detoxifying harmful substances. While the skin is the largest organ by surface area, the liver is the largest internal organ and is crucial for various physiological processes. The heart is responsible for pumping blood, the lungs for respiration, and the skin for protection and temperature regulation, but they do not perform the functions specified in the question.
3. How is power related to work and time?
- A. Power = Work ÷ Time
- B. Power = Work × Time
- C. Power = Work + Time
- D. Power = Work - Time
Correct answer: A
Rationale: Power is defined as the rate at which work is done or the amount of work done per unit of time. The correct formula to relate power, work, and time is Power = Work ÷ Time. This formula shows that power is calculated by dividing the amount of work done by the time taken to do that work, indicating the rate at which work is being done. Choice B (Power = Work × Time) is incorrect because multiplying work and time does not yield a measure of power. Choice C (Power = Work + Time) is incorrect as adding work and time does not define power. Choice D (Power = Work - Time) is also incorrect because subtracting work and time does not relate to the concept of power.
4. What is the process of converting light energy into chemical energy called?
- A. Respiration
- B. Fermentation
- C. Photosynthesis
- D. Hydrolysis
Correct answer: C
Rationale: - Respiration (Option A) is the process by which cells break down glucose to release energy. - Fermentation (Option B) is an anaerobic process that also involves the breakdown of glucose to release energy. - Hydrolysis (Option D) is a chemical process that involves the breakdown of molecules by adding water. Photosynthesis (Option C) is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose. During photosynthesis, plants use sunlight, carbon dioxide, and water to produce glucose and oxygen. This process is essential for the survival of plants and ultimately sustains life on Earth by providing oxygen for other organisms to breathe and serving as a source of energy in the food chain.
5. What is the difference between a phylum and a class?
- A. Phylums are broader and more general
- B. Classes are broader and more general
- C. They are synonyms, used for the same groups
- D. Phylums are for plants, classes are for animals
Correct answer: A
Rationale: In biological classification, a phylum is a higher taxonomic rank than a class. A phylum is a broader category that encompasses multiple classes within it. It represents a group of organisms sharing a common body plan or evolutionary history. On the other hand, a class is a more specific category within a phylum that includes organisms with similar characteristics. Therefore, phyla are broader and more general compared to classes. Choice B is incorrect because classes are more specific categories within phyla. Choice C is incorrect as phyla and classes are distinct hierarchical levels in taxonomy. Choice D is incorrect because phyla and classes are not restricted to specific types of organisms; they can apply to various organisms across the biological kingdom.
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