A school nurse is preparing a presentation to the school board on the scope of practice of the school

Correct Answer: C

Rationale: The correct answer is C because the Nurse Practice Act is a state law that defines the scope of practice for nurses, including school nurses. This law outlines the specific duties, responsibilities, and limitations of nurses in that state, ensuring they practice safely and within legal boundaries. Choice A is incorrect as it doesn't address the legal framework. Choice B is incorrect because the Nurse Practice Act supersedes any job description set by the school district. Choice D is incomplete and irrelevant to the question.

Correct Answer: D

Rationale: The correct answer is D (A and C). Independent assortment of chromosomes occurs during meiosis when homologous chromosomes separate randomly, leading to genetic variation in offspring. Recombination, or crossing over, also occurs during meiosis when genetic material is exchanged between homologous chromosomes, further increasing genetic diversity. Mutation (choice B) can occur in both sexual and asexual reproduction, so it is not specific to sexual reproduction. Choice D is correct because both independent assortment and recombination are unique mechanisms of genetic change in sexual reproduction, leading to genetic variation in offspring.

Correct Answer: A

Rationale: The genetic code is redundant because different codons can specify the same amino acid. This redundancy provides a buffer against mutations, ensuring that a change in a single nucleotide does not always result in a change in the amino acid being coded for. This redundancy allows for error correction during translation, increasing the robustness of the genetic code. Choices B, C, and D are incorrect because the redundancy in the genetic code is primarily for ensuring accuracy and reliability in protein synthesis, not for developing new amino acids or non-coding signals.

Correct Answer: B

Rationale: The correct answer is B because differential mRNA splicing involves removing introns and joining exons from a single primary RNA transcript to create various mRNA isoforms. This process allows for the production of multiple proteins from a single gene, increasing genetic diversity. Choice A is incorrect because mRNA splicing does not involve creating a backup copy of DNA. Choice C is incorrect as mRNA carries the genetic code to the ribosomes, not the cytoplasm. Choice D is incorrect because ribosomes are not held together by mRNA splicing; they are composed of proteins and rRNA.

Correct Answer: B

Rationale: Correct Answer: B Rationale: 1. Mutations are random and constantly occurring in populations. 2. Deleterious alleles can arise from new mutations. 3. Selectively removing carriers won't prevent new mutations. 4. Thus, even if carriers are eliminated, new carriers will emerge, making it impossible to completely eradicate deleterious alleles. 5. This perpetual nature of mutations undermines any effort to eliminate deleterious alleles effectively.