Q: The flow of water through the sponge is unidirectional, driven by the beating of what? Choices: - antennae - cilia - fin - flagella A:
flagella

Q: Abnormally high activity or low activity of the parathyroid gland can cause disorders related to levels of what bone mineral? Choices: - potassium - collagen - magnesium - calcium A:
calcium

Q: Studies have shown that not only does reproduction have a cost as far as how long male fruit flies live, but also fruit flies that have already mated several times have limited amounts of this? Choices: - dna - eggs - chromosomes - sperm A:
sperm