TEAS 7 Science Practice Test

Correct Answer: C

Rationale: The correct answer is C: Antibodies. Adaptive immunity involves the body's ability to recognize and remember specific pathogens, such as viruses or bacteria. Antibodies are proteins produced by the immune system in response to these specific pathogens, providing targeted defense. In contrast, choices A and B (inflammation and fever) are examples of innate immunity, which are non-specific responses to pathogens. Choice D, phagocytosis, is a component of both innate and adaptive immunity, involving the engulfment and destruction of pathogens by immune cells. However, antibodies represent a key feature of adaptive immunity by specifically targeting and neutralizing pathogens.

Correct Answer: B

Rationale: The correct answer is B: follicles. Follicles contain a single immature egg cell that is released during ovulation. The egg cell matures within the follicle before being released. Oocytes (A) are the actual immature egg cells within the follicles. Ovaries (C) are the reproductive organs that contain the follicles and oocytes. Fallopian tubes (D) are the structures where fertilization typically occurs after ovulation, but they do not contain the immature egg cell before ovulation.

Correct Answer: B

Rationale: In anaphase of mitosis, chromatids separate and move to opposite poles of the cell, ensuring each daughter cell receives a complete set of chromosomes. This ensures genetic stability and accurate distribution of genetic material. In metaphase, chromosomes align at the cell's equator but do not separate. Prophase is the initial stage of mitosis where chromosomes condense but do not divide, and telophase is the final stage where chromosomes decondense and nuclear envelopes reform. Therefore, anaphase is the correct phase where chromatids divide into chromosomes and migrate to opposite ends of the cell.

Correct Answer: C

Rationale: The correct answer is C. When two heterozygous mice (WwSs) are crossed, they can produce offspring with genotypes of Ww, WW, ww, Ss, SS, ss. Therefore, the most likely genotype for their offspring is WwSs. Choice A (wwss) is incorrect because it doesn't account for the possibility of capital letters in the genotypes. Choice B (WWSS) is incorrect because it represents the homozygous dominant genotype, which is less likely when crossing heterozygous mice. Choice D (WWSs) is incorrect because it assumes the offspring will have two dominant alleles for the first trait and one dominant allele for the second trait, which is less likely than having both traits in heterozygous form.

Correct Answer: C

Rationale: The correct answer is C: lipids. Lipids are non-soluble in water due to their hydrophobic nature. They are composed of hydrocarbons, such as fatty acids, which provide a concentrated source of energy storage in the body. Carbohydrates (choice A) are soluble and primarily serve as a quick energy source. Nucleic acids (choice B) are involved in genetic information storage and transfer. Proteins (choice D) are made up of amino acids and have various functions in the body, but they are not typically used for energy storage. Therefore, lipids are the only option that fits all the criteria given in the question.