Q: What is another term for chemical messenger molecules? Choices: - pheromones - enzymes - acids - hormones A:
hormones

(Question)
Q: Pyramids of net production and biomass reflect what level of efficiency? Choices: - high - medium - extreme - low A:
(Answer)
low

Ques: Q: Surface tension of alveolar fluid, which is mostly water, creates an inward pull of the tissue of what organ? Choices: - spleen - brain - heart - lung A:
Ans: lung

(Q).
Q: What occurs when groups from the same species stop mating because of something other than physical or geographic separation? Choices: - extinction - complementary speciation - invasive speciation - sympatric speciation A:
(A).
sympatric speciation

Ques:Q: The effect of gravity on circulation means that it is harder to get blood up from the legs as the body takes on this? Choices: - frontal orientation - dorsal orientation - horizontal orientation - vertical orientation A:

Ans:vertical orientation

Question: Q: Which energy is momentarily stored in tendons after each leap provides a boost for the next leap? Choices: - alternating - thermal - magnetic - kinetic A:
Answer:
kinetic