ati teas 7 science

Correct Answer: B

Rationale: When a sound wave travels from air to water, its speed decreases because sound travels faster in denser mediums. Water is denser than air, so the speed of sound decreases. This decrease occurs due to the change in the medium's properties affecting the wave propagation speed. The other choices are incorrect because the speed of sound is not dependent on frequency (choice D) and it doesn't remain the same (choice C) when transitioning between different mediums. Choice A is incorrect as an increase in density leads to a decrease in speed, not an increase.

Correct Answer: D

Rationale: The correct answer is D: Influenza. Influenza is caused by a virus, specifically the influenza virus. Step-by-step rationale: 1. Influenza is a contagious respiratory illness caused by the influenza virus. 2. Viruses are known to be the causative agents of influenza. 3. Asthma (A), Cystic Fibrosis (B), and Epiglottitis (C) are not caused by viruses; asthma is a chronic inflammatory disease, cystic fibrosis is a genetic disorder, and epiglottitis is usually caused by bacteria.

Correct Answer: D

Rationale: The correct answer is D: Aorta. The aorta is responsible for pumping oxygenated blood to the body. This happens after the oxygenated blood leaves the left ventricle of the heart through the aortic valve. The aorta is the largest artery in the body and carries blood to all parts of the body, supplying oxygen and nutrients. The other choices are incorrect because: A: Right ventricle pumps deoxygenated blood to the lungs. B: Left ventricle pumps oxygenated blood to the body. C: Pulmonary artery carries deoxygenated blood from the heart to the lungs for oxygenation.

Correct Answer: C

Rationale: The correct answer is C: Polypeptide. Translation is the process in which mRNA is decoded by ribosomes to synthesize a specific polypeptide. During translation, transfer RNA (tRNA) molecules bring specific amino acids to the ribosome based on the mRNA codons, and these amino acids are joined together to form a polypeptide chain. The other choices are incorrect because translation does not result in the production of DNA (A), lipids (B), or carbohydrates (D). Translation specifically involves the synthesis of polypeptides, making choice C the correct answer.

Correct Answer: C

Rationale: Gold (C) is the correct answer because it is highly malleable and does not tarnish. Gold is a popular choice for jewelry due to its durability and resistance to corrosion. Iron (A) is not commonly used in jewelry due to its susceptibility to rust. Copper (B) is malleable but prone to tarnishing. Silver (D) is malleable but can tarnish over time, making it less ideal for long-lasting jewelry pieces.