Q: What subphylum, which includes crabs and crayfish, represents the dominant aquatic arthropods? Read this paragraph and choose the correct option from the provided answers: Crustaceans, such as shrimp, lobsters, crabs, and crayfish, are the dominant aquatic arthropods. A few crustaceans are [3] terrestrial species like the pill bugs or sow bugs. The number of described crustacean species stands at about 47,000. Although the basic body plan in crustaceans is similar to the Hexapodahead, thorax, and abdomenthe head and thorax may be fused in some species to form a cephalothorax, which is covered by a plate called the carapace (Figure 15.22). The exoskeleton of many species is also infused with calcium carbonate, which makes it even stronger than in other arthropods. Crustaceans have an open circulatory system in which blood is pumped into the hemocoel by the dorsal heart. Most crustaceans typically have separate sexes, but some, like barnacles, may be hermaphroditic. Serial hermaphroditism, in which the gonad can switch from producing sperm to ova, is also found in some crustacean species. Larval stages are seen in the early development of many crustaceans. Most crustaceans are carnivorous, but detritivores and filter feeders are also common. Choices: - arachnids - sponges - invertebrates - crustaceans A:
crustaceans

Q: A mutation is a random change in an organism's what? Read this paragraph and choose the correct option from the provided answers: At some point, the variation probably came from a mutation. A mutation is a random change in an organism's genes. Mutations are natural. Some are harmful, but many are neutral. If the trait from the mutation is beneficial, that organism may have a better chance to survive. An organism that survives is likely to have offspring. If it does, it may pass the mutation on to its offspring. The offspring may be more likely to survive. Choices: - power - structure - babies - genes A:
genes

Q: Q: Heat, electricity, or light might provide what necessary input to the process of decomposition? Read this paragraph and choose the correct option from the provided answers: Most decomposition reactions require an input of energy in the form of heat, light, or electricity. 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? Read this paragraph and choose the correct option from the provided answers: 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? Read this paragraph and choose the correct option from the provided answers: Biotic factors are the parts of the environment that are alive, or were alive and then died, such as plants, animals, and their remains. Biotic factors also include bacteria, fungi and protists. Choices: - abiotic factors - xerophytic factors - decomposition factors - biotic factors A:
**Answer**
biotic factors

(Question)
Q: During protein synthesis, ribosomes assemble what into proteins? Read this paragraph and choose the correct option from the provided answers: Figure 4.13 Ribosomes are made up of a large subunit (top) and a small subunit (bottom). During protein synthesis, ribosomes assemble amino acids into proteins. Choices: - rna acids - polymer acids - DNA Acids - amino acids A:
(Answer)
amino acids