Speed of sound in water = 1500 m/s
frequency = 20Hz
wavelength = s/f = 1500/20 = 75m
The way that the location of DNA in animal cells compares to DNA's location in plant cells is that animal cells have DNA in their nuclei and mitochondria, while plant cells have it in their nuclei, mitochondria, and chloroplasts.
The correct answer is A.
D) Mangrove tree crab. There would be a drop in the predators that feed on them. Crocodile populations would drop due to food shortage, and mangroves might also suffer from the high crab populations, so only D is correct.
