ATI TEAS Practice Science Test

Correct Answer: B

Rationale: To convert grams to kilograms, we divide by 1000 since there are 1000 grams in a kilogram. Therefore, 1800 grams divided by 1000 equals 1.8 kilograms. Choice B is correct. Choice A is incorrect because 0.18 is the result of dividing by 10, not 1000. Choice C is incorrect as it is 10 times the correct answer. Choice D is incorrect as it is 100 times the correct answer.

Correct Answer: A

Rationale: The dependent variable in a study is the outcome that is being measured or tested. In this scenario, the weight of the fish is being measured weekly as a result of being fed different amounts of food daily. The fish weight is directly influenced by the amount of food they consume, making it the dependent variable. This is the variable that changes in response to the independent variable, which is the amount of food given. Summary: A: Weight of the fish - Correct, as it is the outcome being measured. B: Type of food used - Incorrect, as this is not the variable being tested. C: Number of fish tanks - Incorrect, as this is not the variable being measured. D: Frequency of feedings - Incorrect, as this is not the outcome being tested.

Correct Answer: A

Rationale: The correct answer is A: Adenine. Adenine forms a complementary base pair with cytosine through hydrogen bonding in DNA. This pairing is essential for maintaining the structure and stability of the DNA double helix. Adenine and cytosine form two hydrogen bonds between them. Choices B, C, and D are incorrect because cytosine does not bind with itself (B), guanine (C), or thymine (D) in DNA. Thymine pairs with adenine, while guanine pairs with cytosine. Therefore, the correct base that binds with cytosine is adenine.

Correct Answer: C

Rationale: The correct answer is C: Flexor. Flexor muscles are responsible for bending a joint by decreasing the angle between the bones they act upon. They contract to bring two body parts closer together. Cardiac muscles (A) are found in the heart and control its pumping action. Extension (B) refers to the straightening of a joint, not bending. Smooth muscles (D) are found in various organs and are not directly involved in joint movement. Therefore, the flexor muscle (C) is the correct choice for causing a joint to bend.

Correct Answer: C

Rationale: The correct answer is C: Epithelial cells. Epithelial cells are found in the hair bulb and are responsible for hair growth because they undergo rapid cell division and differentiation to form the hair shaft. Basal cells (choice A) are a type of epithelial cell found in the skin, but they mainly function in the regeneration of the epidermis. Epidermal cells (choice B) refer to the outer layer of the skin and do not play a direct role in hair growth. Merkel cells (choice D) are specialized touch receptors found in the skin, but they are not involved in hair growth. In summary, epithelial cells in the hair bulb are specifically designed for hair growth through their rapid division and differentiation process.