TEAS 7 Science Practice Test

Correct Answer: B

Rationale: The correct answer is B: A dominant allele will always be expressed. This is because dominant alleles mask the expression of recessive alleles in heterozygous individuals. This means that if an individual carries at least one dominant allele for a particular trait, that dominant allele will be expressed phenotypically. In contrast, recessive alleles are only expressed when an individual is homozygous for that allele. Now, let's analyze the other choices: A: All genes adhere to Mendel's law of dominance - This is incorrect as not all genes follow Mendel's law of dominance, especially in cases of incomplete dominance or codominance. C: When two dominant alleles are present, the resulting phenotype will express both traits - This is incorrect as dominance determines which allele is expressed, so only the dominant trait will be expressed in this case. D: There are three or more alleles possible for all genes - This is incorrect as some genes may have multiple alleles, but not all genes have three

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.

Correct Answer: A

Rationale: The correct answer is A because this situation indicates that the results are consistent (reliable) across experiments, but the test used does not measure what it claims to measure (not valid). Reliability refers to consistency in results, while validity refers to accuracy in measuring what it intends to measure. Therefore, in this scenario, the results can be consistently replicated (reliable) even though the test does not actually measure the intended concept (not valid). Summary: A: The results are consistent (reliable) but the test is not measuring what it claims to measure (not valid). B: This choice does not fit the scenario described in the question. C: This choice indicates both reliability and validity are lacking, which does not align with the scenario. D: This choice implies that both reliability and validity are present, which contradicts the situation described.

Correct Answer: B

Rationale: The primary function of the respiratory system is to facilitate the exchange of oxygen and carbon dioxide in the body. Step 1: During inhalation, oxygen is taken into the lungs. Step 2: Oxygen is then transported to the cells via the bloodstream. Step 3: Carbon dioxide, a waste product, is removed from the body during exhalation. This process is essential for cellular respiration and energy production. Choices A, C, and D are incorrect because speech production, nutrient transport, and organ protection are not the primary functions of the respiratory system.

Correct Answer: A

Rationale: The correct answer is A because fascia functions to enclose, protect, support, and separate muscle tissue. Fascia is a connective tissue that surrounds muscles, providing structural integrity, protecting muscles from friction, and allowing for movement while maintaining muscle shape. It also separates muscles into compartments, assisting in the coordination of muscle actions. Choices B, C, and D are incorrect because fascia does not primarily connect muscle tissue to bone, serve as the contractile unit of muscle, or directly interact with actin protein cells to create muscle contractions.