ati teas 7 science

Correct Answer: C

Rationale: Destructive interference occurs when two waves meet and their amplitudes are out of phase, leading to the waves cancelling each other out. This results in a reduction or complete elimination of the wave's intensity at that point. Refraction (A) is the bending of waves due to a change in medium. Diffraction (B) is the bending of waves around obstacles. Constructive interference (D) occurs when two waves align their amplitudes and reinforce each other.

Correct Answer: D

Rationale: The Golgi apparatus is responsible for modifying, sorting, and packaging proteins and lipids for transport within or outside the cell. It receives proteins from the endoplasmic reticulum for further processing. Option D is correct because it accurately describes the main functions of the Golgi apparatus. Option A is incorrect because the transport of proteins and lipids is primarily carried out by the endoplasmic reticulum. Option B is incorrect as the Golgi apparatus is not primarily for storing water and nutrients. Option C is incorrect because protein synthesis primarily occurs in the ribosomes, not the Golgi apparatus.

Correct Answer: B

Rationale: The correct answer is B: It runs 3' to 5'. The antisense strand of DNA runs in the opposite direction to the sense strand. This is essential for complementary base pairing during transcription. The 3' to 5' direction allows RNA polymerase to synthesize RNA in the 5' to 3' direction, following the template of the antisense strand. Therefore, choice B is correct. Choices A and C are incorrect because the directionality of the antisense strand is opposite to 5' to 3' and it is used in transcription, not replication. Choice D is incorrect as DNA is stored in the cell nucleus in a double helix structure, not in a specific direction.

Correct Answer: B

Rationale: The correct answer is B because "survival of the fittest" refers to the idea that organisms with the best adaptations to their environment are more likely to survive and reproduce, passing on their advantageous traits to the next generation. This concept, coined by Charles Darwin, emphasizes the importance of natural selection in driving evolution. Choice A is incorrect as complexity does not always equate to fitness. Choice C is incorrect as natural selection favors certain traits over others. Choice D is incorrect as survival and reproduction are not solely determined by strength and aggression.

Correct Answer: A

Rationale: The correct answer is A: Stapes. The stapes is the smallest bone in the human body, located in the middle ear. It plays a crucial role in transmitting sound vibrations to the inner ear. The other choices are incorrect because the patella is a knee bone, phalanges are finger bones, and ribs are chest bones, none of which are the smallest bone in the body. The stapes' small size and specific location make it uniquely suited for its function in hearing.