Q: What do marine autotrophs acquire in carbonic acid, its dissolved form? Choices: - silicon dioxide - chlorine dioxide - carbon monoxide - carbon dioxide A:
carbon dioxide

Q: What is the joint where the pelvic girdle and leg come together? Choices: - hip socket - meniscus - femur joint - hip joint A:
hip joint

Q: Q: What do you call a predator species that affects other species' populations when its own population size changes? Choices: - paradox species - symbiotic species - complement species - keystone species A:
A: keystone species

Question: Q: When bacteria are destroyed by leukocytes, what are released into the blood? Choices: - carcinogens - proteins - sporozoans - pyrogens A:
Answer: pyrogens

*Question*
Q: What chemical substances are secreted by animals that communicate by odor or taste? Choices: - alaki - hormones - acids - pheromones A:
**Answer**
pheromones

*Question*
Q: In what route do water and solutes move along the continuum of cytosol? Choices: - hydrophylic - hydrophobic - nonvascular - symplastic A:
**Answer**
symplastic