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ATI TEAS 7

Biology

1. Which of the following is NOT a source of genetic variation in a population?

Correct answer: D

Rationale: Rationale: A) Mutations in genes: Mutations are changes in the DNA sequence that can introduce new alleles into a population, leading to genetic variation. B) Genetic drift (random fluctuations in allele frequencies): Genetic drift refers to random changes in allele frequencies in a population, which can lead to genetic variation through chance events. C) Gene flow (movement of genes between populations): Gene flow occurs when individuals move between populations, bringing new alleles with them and increasing genetic variation within populations. D) Blending inheritance (traits of parents are averaged in offspring): Blending inheritance was a historical theory that suggested offspring inherit a blend of traits from their parents, leading to a reduction in genetic variation over time. However, this concept has been disproven by the understanding of Mendelian genetics, where traits are inherited independently and do not blend together. Therefore, blending inheritance does not contribute

2. Which sentence uses the modal verb "should" correctly?

Correct answer: B

Rationale: Option B conveys an intention or expectation regarding the present or near future.

3. Which term describes a substance's ability to undergo a change that transforms it into a different substance?

Correct answer: c

Rationale: Reactivity refers to a substance's ability to undergo a chemical change or reaction, transforming it into one or more different substances with new properties.

4. A table shows the blood pressure readings for different age groups. How do you determine the patient with the highest systolic pressure?

Correct answer: A

Rationale: The best way is to compare the average systolic pressure values for each age group to identify the highest.

5. Define "friction" in terms of opposing motion.

Correct answer: c

Rationale: Friction acts opposite to the direction of motion, resisting or slowing down the movement of objects.

6. The free edges of your fingernails and toenails are technically called the:

Correct answer: D

Rationale: The free edges of your fingernails and toenails are the parts that extend beyond the fingertip or toe. These edges are commonly referred to simply as the "free edge" because they are not attached to the skin. The lunula is the white crescent moon shape at the base of the nail, the matrix is the area under the nail where new nail cells are produced, and the hyponychium is the skin under the free edge of the nail. Therefore, the correct answer is D.

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