scoliosis is a condition characterized by abnormal lateral curvature of the spine which part of the spine is most commonly affected
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ATI TEAS 7

TEAS Test 7 science

1. Scoliosis is a condition characterized by abnormal lateral curvature of the spine. Which part of the spine is most commonly affected?

Correct answer: B

Rationale: Scoliosis most commonly affects the thoracic spine, which is the upper back region. While scoliosis can potentially affect any part of the spine, the thoracic spine is the most frequently involved area. This region is more commonly affected due to the natural structural curves of the spine and the biomechanics of the thoracic area. The cervical spine (neck) and lumbar spine (lower back) can also be affected by scoliosis, but the thoracic spine is the primary area of involvement in most cases. Therefore, the correct answer is B, as it is the part of the spine most commonly affected by scoliosis.

2. Cartilage, a type of connective tissue, provides flexible support in various structures. Which of these structures does NOT contain cartilage?

Correct answer: C

Rationale: Cartilage is a type of connective tissue that provides flexible support in various structures. Ears, joints, and the nose all contain cartilage. Muscles, however, are made up of muscle tissue, not cartilage. Therefore, muscles do not contain cartilage. Choice A, ears, choice B, joints, and choice D, nose, are incorrect as they all contain cartilage. Choice C, muscles, is the correct answer as muscles are not composed of cartilage.

3. What role does DNA play in evolution?

Correct answer: D

Rationale: A) DNA stores genetic information that is passed on from parents to offspring through the process of reproduction. This genetic information contains instructions for the development and functioning of an organism. It serves as the hereditary material that carries the blueprint for an organism's traits and characteristics, allowing for the transmission of genetic information from one generation to the next. B) DNA can undergo mutations, which are changes in the genetic sequence. These mutations can introduce new variations in the DNA, leading to genetic diversity within a population. These variations are essential for natural selection and adaptation to changing environments. C) DNA plays a crucial role in regulating the expression of genes. Gene expression determines which proteins are produced in an organism, influencing its traits and characteristics. By controlling gene expression, DNA contributes to the development and maintenance of an organism's traits. D) Therefore, DNA is involved in all of the above processes, making it a key factor in evolution by driving genetic variation, inheritance, and gene expression. The interplay of these functions allows for the diversity and adaptation of species over time, shaping the evolutionary process.

4. Which of the following uses introductory punctuation correctly?

Correct answer: C

Rationale: Option C is the correct answer as it uses introductory punctuation correctly by placing a comma after the introductory clause 'Since we only have ten minutes.' Commas are used to separate introductory phrases or clauses from the main clause in a sentence. Option A is incorrect as it lacks the necessary comma after the introductory phrase. Option B uses a semicolon, which is not typically used in this context. Option D uses a colon, which is not appropriate for introducing the following clause in this sentence structure.

5. Which word best completes the sentence: 'The students _______ finished their exams.'

Correct answer: B

Rationale: In the sentence, 'The students' is referring to a plural subject. Since 'students' is plural, the correct verb should also be plural. 'Have' is the correct verb form for the plural subject 'students' in this sentence. Choices A, C, and D are incorrect because 'has' and 'is' are singular verbs, while 'was' is past tense and does not agree with the present tense of 'finished.' Therefore, the correct choice is B: 'have.'

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