The passage explains what antibiotics treat, what they do not treat, and the consequences of misuse. Its purpose is informational, focusing on responsible use to prevent resistance. Option C best captures this purpose. The other options either misrepresent or ignore the main focus. Purpose questions on the NEX often test whether the reader understandswhythe passage was written.
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Adequate means enough to meet a need or requirement. Option C correctly matches the meaning. This word is commonly used in healthcare contexts such as adequate nutrition or adequate hydration.
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"Frequent" means occurring often or regularly. Option B is correct. Recognizing time- and frequency-related words is common on the NEX exam.
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Codominance occurs when two different alleles are both expressed in a heterozygous organism. In this case, the red and white alleles combine to produce an intermediate pink phenotype. Non-disjunction refers to chromosome separation errors, multiple alleles involve more than two allele types, and mutations involve DNA changes. The NEX Science exam frequently tests inheritance patterns, including codominance and incomplete dominance.
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Sperm cells are produced in thetestes, specifically within tightly coiled structures called seminiferous tubules.
The process of sperm production is known as spermatogenesis and requires hormones such as testosterone.
Cowper's glands and the prostate gland do not produce sperm; instead, they secrete fluids that contribute to semen and help protect and nourish sperm cells. The epididymis is responsible for sperm maturation and storage but does not produce sperm. The NEX Science exam often tests reproductive anatomy by asking students to distinguish between sperm production, maturation, and transport. Understanding the specific role of each male reproductive structure is essential. Since only the testes are responsible for the formation of sperm cells, option C is the correct answer.