ATI TEAS Practice Science Test

Questions 53

ATI TEAS 7

ATI TEAS 7 Test Bank

ATI TEAS Practice Science Test Questions

Question 1 of 5

Which of the following correctly orders the route of a fetus during childbirth?

Correct Answer: A

Rationale: The correct answer is A: Uterus, cervix, vagina. During childbirth, the fetus travels from the uterus through the cervix and then out through the vagina. The uterus is where the fetus develops, the cervix dilates to allow passage, and the vagina is the birth canal. The other choices are incorrect because they do not follow the correct route of the fetus during childbirth. Choice B (Cervix, uterus, vagina) is incorrect as the fetus does not move from the cervix to the uterus during childbirth. Choice C (Uterus, vas deferens, vagina) is incorrect as the vas deferens is part of the male reproductive system and not involved in childbirth. Choice D (Ovary, fallopian tube, uterus) is incorrect as this represents the path of the egg during fertilization, not the route of the fetus during childbirth.

Question 2 of 5

During which phase of meiosis do chiasmata structures form?

Correct Answer: A

Rationale: During Prophase I of meiosis, chiasmata structures form as homologous chromosomes exchange genetic material through crossing over. This occurs after homologous chromosomes pair up during synapsis. Chiasmata play a crucial role in genetic diversity. In contrast, Prophase II is focused on preparing the cells for division, and chiasmata formation does not occur during this phase. Metaphase I is characterized by the alignment of homologous chromosomes at the metaphase plate, while Metaphase II involves the alignment of sister chromatids. Therefore, the correct answer is A: Prophase I, as it is the specific phase where chiasmata formation takes place.

Question 3 of 5

Which of the following is a characteristic of an interneuron?

Correct Answer: A

Rationale: The correct answer is A: Forms neural circuits. Interneurons are responsible for forming connections between sensory neurons and motor neurons, creating neural circuits that allow for complex processing and coordination of signals within the central nervous system. They do not directly interact with effectors (choice B), send impulses to the CNS (choice C), or function as efferent nerve cells (choice D). Interneurons integrate and relay information within the CNS, playing a crucial role in coordinating various functions such as reflexes, sensory processing, and motor control.

Question 4 of 5

In an experiment where five tropical plants are kept at varying humidity levels in a greenhouse for three months, while one plant is left outside in normal conditions, with plant height measured weekly, what serves as the control of the experiment?

Correct Answer: B

Rationale: The correct answer is B: The plant left outside in normal conditions serves as the control of the experiment. This is because the control group in an experiment remains unchanged and is used as a baseline for comparison. In this case, the plant left outside in normal conditions is the control as it is not subjected to any experimental manipulation, unlike the other tropical plants in the greenhouse. By comparing the growth of the plants in the greenhouse to the plant left outside, any changes in plant height can be attributed to the varying humidity levels, thus allowing for a valid comparison. Choice A is incorrect because plant height for each tropical plant is the experimental variable being measured, not the control. Choice C is incorrect as humidity level readings in the greenhouse are part of the experimental conditions, not the control. Choice D is incorrect because the amount of time used to study plant height is not the control of the experiment; it is the duration of the study.

Question 5 of 5

At what stage is urine formed in the kidney?

Correct Answer: B

Rationale: The correct answer is B because urine is formed in the kidney during the process of fluid filling the collecting duct. This is where the final concentration and composition of urine are regulated. Before reaching the collecting duct, the initial filtration of blood occurs in the glomerulus (eliminating options C) and the fluid does not become urine until it has passed through the collecting duct (eliminating options A and D). So, the correct sequence is filtration in the glomerulus, reabsorption and secretion in the tubules, and final urine formation in the collecting duct.

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