Biology HESI A2 2024

Correct Answer: A

Rationale: The correct answer is A: Stamen. The stamen is the male reproductive organ of a flower, producing pollen containing male gametes. The pistil, stigma, and style are all parts of the female reproductive system, involved in receiving pollen and supporting the development of seeds. Therefore, the stamen is of a different "gender" than the others, making it the correct choice. Stigma and style are specifically part of the pistil, which is the female organ of the flower.

Correct Answer: D

Rationale: The correct answer is D: Salmonella. Binary fission is a form of asexual reproduction where a single organism divides into two identical organisms. Salmonella is a bacterium that reproduces through binary fission. Mushrooms reproduce via spores, blue whales and rainbow trout reproduce sexually. Therefore, Salmonella is the only organism among the choices that reproduces via binary fission.

Correct Answer: D

Rationale: The correct answer is D: genus; species. "Felis" is the genus and "catus" is the species in the scientific name Felis catus. Genus is a broader classification that includes closely related species, while species is the most specific classification level. Kingdom (choice A) is too broad, family (choice A) is at a higher level than species, order (choice B) is too specific, subspecies (choice B) is not part of the scientific name, phylum (choice C) is too broad, and class (choice C) is a higher classification level than species.

Correct Answer: C

Rationale: The formula represents the process of photosynthesis where carbon dioxide (CO₂) and water (H₂O) are converted into glucose (C₆H₁₂O₆) and oxygen (O₂) in the presence of sunlight. Step 1: 6CO₂ + 6H₂O represent the reactants involved in photosynthesis. Step 2: C₆H₁₂O₆ + 6O₂ represent the products formed during photosynthesis. Therefore, the correct answer is C: Photosynthesis. Other choices are incorrect because: A: Glycolysis involves the breakdown of glucose into pyruvate. B: Cellular respiration involves the breakdown of glucose to produce energy. D: Electronic transport is related to the movement of electrons in cellular respiration, not photosynthesis.

Correct Answer: A

Rationale: The correct answer is A: Stamen. The stamen is the male reproductive organ of a flower, producing pollen containing male gametes. The pistil, stigma, and style are all parts of the female reproductive system, involved in receiving pollen and supporting the development of seeds. Therefore, the stamen is of a different "gender" than the others, making it the correct choice. Stigma and style are specifically part of the pistil, which is the female organ of the flower.