TEAS 7 Science Practice Test

TEAS 7 Science Practice Test Related

Review TEAS 7 Science Practice Test related questions and content

A scientist designs an experiment to test the hypothesis that exposure to more sunlight will increase the growth rate of elodea, a type of aquatic plant. The scientist has accumulated data from previous experiments that identify the average growth rate of elodea exposed to natural sunlight in the wild.
In the experiment set up, there are three tanks housing ten elodea each. Tank A is positioned in front of a window to receive natural sunlight similar to what elodea are exposed to; tank B is positioned in front of the same window but has an additional sunlight-replicating lamp affixed to it; and tank C is positioned in a dark corner with no exposure to natural sunlight.

Which of the following is the control group in the above experiment?

  • A. tank A
  • B. tank B
  • C. tank C
  • D. There is no control group in this experiment.
Correct Answer: D

Rationale: The correct answer is D: There is no control group in this experiment. A control group is a group in an experiment that does not receive the treatment being studied in order to serve as a baseline for comparison. In this case, all three tanks (A, B, and C) are being treated with different amounts of fertilizer, and there is no group that is left untreated to serve as a control for comparison. Choices A, B, and C are incorrect because they all represent tanks that are part of the experimental groups receiving different amounts of fertilizer, thus none of them can be considered the control group.

You may also like to solve these questions

What is the primary function of the large intestine?

  • A. absorbing digested material into the blood
  • B. nutrient processing and metabolizing
  • C. absorbing water and compacting material into solid waste
  • D. bile production and storage
Correct Answer: C

Rationale: The large intestine's primary function is to absorb water from undigested food remnants and compact them into solid waste (feces). This process helps regulate hydration levels in the body and aids in waste elimination. Choices A, B, and D are incorrect. Absorbing digested material into the blood is mainly done in the small intestine, nutrient processing and metabolizing occur in various parts of the digestive system, and bile production and storage are functions of the liver and gallbladder, not the large intestine.

Which of the following biological macromolecules is non-soluble, composed of hydrocarbons, and acts as an important source of energy storage for the body?

  • A. carbohydrates
  • B. nucleic acids
  • C. lipids
  • D. proteins
Correct Answer: C

Rationale: Lipids are non-soluble biological macromolecules composed mostly of hydrocarbons such as fatty acids. They act as an essential source of energy storage for the body, providing efficient storage of energy in the form of fats. Carbohydrates are also an energy source for the body, but lipids excel in long-term energy storage. Nucleic acids are not known for energy storage; instead, they are involved in genetic information transmission and protein synthesis. Proteins play diverse roles in the body, such as enzymatic functions, structural support, and immune response, but they are not primarily known as a source of energy storage.

How many neutrons are in an atom of the following element with a mass number of 50?

  • A. 38
  • B. 88
  • C. 50
  • D. 126
Correct Answer: C

Rationale: Neutrons are found in the nucleus of an atom along with protons. To determine the number of neutrons in an atom, subtract the atomic number (number of protons) from the mass number. In this case, the mass number given is 50. Since the atomic number is not specified, we can infer it from the choices provided. The mass number of an element represents the total sum of protons and neutrons in the nucleus. Therefore, the number of neutrons in this atom would also be 50, as the mass number is equivalent to the combined number of protons and neutrons, making choice C the correct answer. Choices A, B, and D are incorrect as they do not match the given mass number of 50.

Which of the following is NOT a function of progesterone in the female reproductive system?

  • A. expression of secondary sexual characteristics, such as enlarged breasts
  • B. stimulation of milk production in the breasts
  • C. regulation and preparation of the endometrial lining of the uterus for potential pregnancy
  • D. inhibition of contractions of the uterus as the ovum is released
Correct Answer: A

Rationale: Progesterone plays a key role in the regulation and preparation of the endometrial lining of the uterus for potential pregnancy. It also inhibits contractions of the uterus as the ovum is released and stimulates milk production in the breasts. However, the expression of secondary sexual characteristics, such as enlarged breasts, is primarily influenced by estrogen, not progesterone. Therefore, choice A is the correct answer as it is not a function directly attributed to progesterone in the female reproductive system.

Which of the following describes the path through which air moves during inhalation?

  • A. mouth/nose > pharynx > larynx > trachea > bronchi > bronchioles > alveoli
  • B. bronchioles > alveoli > bronchi > larynx > pharynx > lungs
  • C. mouth/nose > bronchi > bronchioles > alveoli > lungs > trachea
  • D. alveoli > bronchioles > lungs > bronchi > trachea > larynx > pharynx > mouth/nose
Correct Answer: A

Rationale: The correct path through which air moves during inhalation is from the mouth/nose > pharynx > larynx > trachea > bronchi > bronchioles > alveoli. This sequence accurately represents the typical route air takes as it travels from the external environment into the lungs to facilitate gas exchange in the alveoli. Choice B is incorrect as it reverses the order of bronchioles and alveoli. Choice C is incorrect as it starts with mouth/nose but then incorrectly lists lungs before trachea. Choice D is incorrect as it reverses the entire sequence of the respiratory pathway, starting with alveoli instead of mouth/nose.

Copyright © 2025 Nokea. All rights reserved.