Ques: Q: What do secondary spermatocytes form when completing meiosis? Read this paragraph and choose the correct option from the provided answers: Spermatogonia lining the seminiferous tubule undergo mitosis to form primary spermatocytes , which are also diploid. The primary spermatocytes undergo the first meiotic division to form secondary spermatocytes , which are haploid. Spermatocytes make up the next layer of cells inside the seminiferous tubule. Finally, the secondary spermatocytes complete meiosis to form spermatids . Spermatids make up a third layer of cells in the tubule. Choices: - pores - semen - sporozoans - spermatids A:
Ans: spermatids

Ques: Q: The lymphatic system helps return fluid that leaks from the blood vessels back to what system? Read this paragraph and choose the correct option from the provided answers: The lymphatic system helps return fluid that leaks from the blood vessels back to the cardiovascular system. Choices: - pulmonary - nervous - peripheral - cardiovascular A:
Ans: cardiovascular

Ques: Q: What substance can be identified by their atomic number and mass number? Read this paragraph and choose the correct option from the provided answers: Elements can be identified by their atomic number and mass number. Choices: - structures - compounds - solutions - elements A:
Ans: elements

Ques: Q: How is eye color in humans determined? Read this paragraph and choose the correct option from the provided answers: Eye color in humans is determined by multiple genes. Use the Eye Color Calculator (http://openstaxcollege. org/l/ eye_color_calc) to predict the eye color of children from parental eye color. In some cases, several genes can contribute to aspects of a common phenotype without their gene products ever directly interacting. In the case of organ development, for instance, genes may be expressed sequentially, with each gene adding to the complexity and specificity of the organ. Genes may function in complementary or synergistic fashions, such that two or more genes need to be expressed simultaneously to affect a phenotype. Genes may also oppose each other, with one gene modifying the expression of another. In epistasis, the interaction between genes is antagonistic, such that one gene masks or interferes with the expression of another. "Epistasis" is a word composed of Greek roots that mean "standing upon. " The alleles that are being masked or silenced are said to be hypostatic to the epistatic alleles that are doing the masking. Often the biochemical basis of epistasis is a gene pathway in which the expression of one gene is dependent on the function of a gene that precedes or follows it in the pathway. An example of epistasis is pigmentation in mice. The wild-type coat color, agouti (AA), is dominant to solid-colored fur (aa). However, a separate gene (C) is necessary for pigment production. A mouse with a recessive c allele at this locus is unable to produce pigment and is albino regardless of the allele present at locus A (Figure 12.20). Therefore, the genotypes AAcc, Aacc, and aacc all produce the same albino phenotype. A cross between heterozygotes for both genes (AaCc x AaCc) would generate offspring with a phenotypic ratio of 9 agouti:3 solid color:4 albino (Figure 12.20). In this case, the C gene is epistatic to the A gene. Choices: - random chance - by the father - temperature of the womb - multiple genes A:
Ans:
multiple genes