ATI TEAS Practice Science Test

Correct Answer: D

Rationale: The correct answer is D: Bottom of the uterus. The cervix is the lower narrow end of the uterus that connects to the top of the vagina. It serves as a passage for menstrual blood to exit the body and for sperm to enter the uterus. The other choices are incorrect because the cervix is not located at the top of the uterus (A), top of the ovaries (B), or bottom of the vagina (C). Understanding the anatomical structure and function of the female reproductive system is key to selecting 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: B

Rationale: The correct answer is B: Cytoplasm. Pyruvate is an intermediate product of glycolysis, which occurs in the cytoplasm of the cell. The biochemist isolating pyruvate is working with the cytoplasm because that's where glycolysis takes place. Chloroplasts (A) are involved in photosynthesis, not glycolysis. Mitochondria (C) are responsible for aerobic respiration, where pyruvate is eventually transported to. The nucleus (D) contains the cell's genetic material and is not directly involved in pyruvate metabolism. Thus, the biochemist is likely isolating pyruvate from the cytoplasm.

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.

Correct Answer: C

Rationale: The correct answer is C: Inverse correlation. Negative variation refers to a situation where one variable increases while the other decreases, showing an inverse relationship. This is different from non-correlation (A), which implies no relationship between variables. Direct correlation (B) indicates both variables moving in the same direction, while positive correlation (D) implies both variables increasing together. Therefore, C is the only choice that accurately represents negative variation.