Q: Both sexes of sockeye salmon turn red with green heads just prior to what? Choices: - dying - feeding - migrating - spawning A:
spawning

Q: The lithosphere-asthensophere divisions are based on what? Choices: - mechanical compounds - elemental properties - constant properties - mechanical properties A:
mechanical properties

Q: Q: Single-celled eukaryotes that share some traits with animals are also called? Choices: - prokaryotes - monomers - microorganisms - eukaryotes A:
A: eukaryotes

Question: Q: Echinoderms lack what type of system that in humans consists of the brain and spinal cord? Choices: - autonomic system - endocrine system - peripheral nervous system - centralized nervous system A:
Answer: centralized nervous system

*Question*
Q: What organs absorb water and nutrients from the soil? Choices: - flowers - buds - leaves - roots A:
**Answer**
roots

Q: The use of mercury-based dental amalgam has gone under question in recent years because of concerns regarding what? Choices: - the expense - the oxygen - the variability - the toxicity A:
the toxicity