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ATI TEAS 7 · Science · TEAS 7 practice test science

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

What are fingernails and toenails primarily made of?

A. Collagen (Collagen is found in the dermis)

B. Keratin

C. Melanin (Melanin provides pigment, not structure)

D. Sebum (Sebum is an oily substance)

Correct Answer: Keratin

Question 2 of 5

What phenomenon occurs when a wave encounters a change in medium causing a change in its speed and direction?

A. Refraction

B. Reflection

C. Diffraction

D. Interference

Correct Answer: Refraction

Question 3 of 5

Lymph nodes, found along lymphatic vessels, are important for:

A. Storing blood

B. Producing antibodies

C. Filtering lymph and trapping harmful substances

D. All of the above

Correct Answer: Filtering lymph and trapping harmful substances

Question 4 of 5

Which type of immune cell does the human immunodeficiency virus (HIV) target and destroy?

A. Neutrophils

B. Macrophages

C. Helper T cells

D. Memory B cells

Correct Answer: Helper T cells

Question 5 of 5

What is the science of classifying organisms into different groups based on their evolutionary relationships called?

A. Taxonomy

B. Microbiology

C. Genetics

D. Epidemiology

Correct Answer: Taxonomy

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