{"question": "Which of the following represents an accurate statement concerning arthropods?", "options": ["They possess an exoskeleton composed primarily of peptidoglycan.", "They possess an open circulatory system with a dorsal heart.", "They are members of a biologically unsuccessful phylum incapable of exploiting diverse habitats and nutrition sources.", "They lack paired, jointed appendages."], "answer": "B"}
{"question": "In a given population, 1 out of every 400 people has a cancer caused by a completely recessive allele, b. Assuming the population is in Hardy-Weinberg equilibrium, which of the following is the expected proportion of individuals who carry the b allele but are not expected to develop the cancer?", "options": ["1/400", "19/400", "20/400", "38/400"], "answer": "D"}
{"question": "The presence of homologous structures in two different organisms, such as the humerus in the front limb of a human and a bird, indicates that", "options": ["the human and bird are polyphyletic species", "a human's and bird's evolution is convergent", "the human and bird belong to a clade", "the human and bird developed by analogy"], "answer": "C"}
{"question": "According to the pressure-flow model of movement of phloem contents, photosynthate movement from source to sink is driven by", "options": ["an ATP-dependent pressure-flow pump", "a water-pressure potential gradient", "transpiration", "apoplastic diffusion"], "answer": "B"}
{"question": "Which of the following contain DNA sequences required for the segregation of chromosomes in mitosis and meiosis?", "options": ["Telomeres", "Centromeres", "Nucleosomes", "Spliceosomes"], "answer": "B"}