TEAS 7 Science Practice Test

Correct Answer: A

Rationale: The correct answer is A, pancreas and salivary glands. Amylase is an enzyme that breaks down starch into sugars. Salivary glands produce salivary amylase, which starts the digestion of carbohydrates in the mouth. The pancreas also produces pancreatic amylase, which further digests carbohydrates in the small intestine. Gall bladder and liver do not produce amylase. Therefore, choices B, C, and D are incorrect as they do not align with the production sites of amylase in 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.

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: B

Rationale: The correct answer is B: fallopian tube. Fertilization typically occurs in the fallopian tube because this is where the egg is typically fertilized by a sperm. The fallopian tube provides the ideal environment for fertilization to take place, with cilia helping to move the egg towards the uterus. The other choices are incorrect because fertilization does not occur in the uterus (choice A), endometrium (choice C), or ovary (choice D). The uterus is where the fertilized egg implants and develops into an embryo, the endometrium is the inner lining of the uterus, and the ovary is where the eggs are produced and released during ovulation.