Q: The main functions of epithelia are protection from the environment, coverage, secretion and excretion, absorption, and this? Choices: - absorption - accumulation - diffusion - filtration A:
filtration

Q: What causes nitrate to go back to its gaseous nitrogen state? Choices: - phytoflagellate bacteria - decomposers - enzymes - denitrifying bacteria A:
denitrifying bacteria

Q: Q: What are misfolded versions of normal brain proteins? Choices: - ribosomes - protons - humans - prions A:
A: prions

Question: Q: Goldfish, tuna, salmon, perch, and cod are examples of which group of fish? Choices: - spiny-lobed fish - cartilaginous fish - bony fish - ray-finned fish A:
Answer: ray-finned fish

*Question*
Q: Apical dominance, seed germination, gravitropism, and resistance to freezing are all positively influenced by what type of chemicals in plants? Choices: - pesticides - enzymes - photosynthesis - hormones A:
**Answer**
hormones

(Q).
Q: Pieces of the cell break off and form a new cell in what type of reproduction that produces genetically identical organisms? Choices: - Meiosis - Mitosis - Fusion - fragmentation A:
(A).
fragmentation