Q: What subphylum, which includes crabs and crayfish, represents the dominant aquatic arthropods? Choices: - arachnids - sponges - invertebrates - crustaceans A:
crustaceans

Q: A mutation is a random change in an organism's what? Choices: - power - structure - babies - genes A:
genes

Q: Q: Heat, electricity, or light might provide what necessary input to the process of decomposition? Choices: - source - material - food - energy A:
A: energy

Question: Q: Biodiversity hot spots are prime candidates for protection because they are prone to what species fate? Choices: - mutation - reduction - accumulation - extinction A:
Answer: extinction

*Question*
Q: What factors consist of parts of the environment that are or were alive, and their remains? Choices: - abiotic factors - xerophytic factors - decomposition factors - biotic factors A:
**Answer**
biotic factors

(Question)
Q: During protein synthesis, ribosomes assemble what into proteins? Choices: - rna acids - polymer acids - DNA Acids - amino acids A:
(Answer)
amino acids