TEAS 7 Science Practice Test

Correct Answer: D

Rationale: The correct answer is D: Combustion reaction. In a combustion reaction, a compound reacts with oxygen gas to produce carbon dioxide and water. In this equation, 2C₆H₁₄ (hexane) reacts with 19O₂ to produce 12CO (carbon monoxide) and 14H₂O (water). This reaction is characteristic of combustion, where a fuel (hexane) reacts with oxygen to release energy in the form of heat and light. Summary: A: Substitution reaction involves replacing one element or group in a compound with another element or group. This is not demonstrated in the given equation. B: Acid-base reaction involves the transfer of protons between substances. There are no acids or bases involved in the given equation. C: Enzyme reaction involves the catalysis of a chemical reaction by an enzyme. Enzymes are not mentioned in the given equation.

Correct Answer: A

Rationale: The correct answer is A. Progesterone is not responsible for the expression of secondary sexual characteristics, such as enlarged breasts. Progesterone's main functions in the female reproductive system are to regulate and prepare the endometrial lining of the uterus for potential pregnancy, inhibit contractions of the uterus as the ovum is released, and stimulate milk production in the breasts. Enlarged breasts are primarily influenced by estrogen, another hormone in the female reproductive system. Thus, A is the correct answer as it does not align with the known functions of progesterone.

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.

Correct Answer: D

Rationale: Peristalsis is the correct term as it refers to the rhythmic muscle contractions that propel food through the digestive tract. First, the circular muscles contract behind the food bolus, pushing it forward. Then, the longitudinal muscles contract, shortening the tract and pushing the food further. This process continues in a wave-like fashion, aiding in digestion. A: Digestion refers to the breakdown of food into smaller molecules. B: Deglutition is the process of swallowing food. C: Defecation is the elimination of waste from the body. Therefore, peristalsis is the correct term as it specifically describes the muscle contractions that move food through the digestive system.

Correct Answer: C

Rationale: The correct answer is C, the law of independent assortment. This law states that alleles for different traits segregate independently of each other during gamete formation. This is due to the random alignment of homologous chromosomes during meiosis. The law of segregation (A) describes how alleles of a gene separate during gamete formation. The law of dominance (B) explains that one allele can mask the expression of another in heterozygous individuals. The law of predictive traits (D) is not a recognized Mendelian law and is therefore incorrect. In summary, the law of independent assortment best describes how alleles from different genes segregate independently during gamete formation.