Answer the following question given this paragraph: In benzene, the true bonding between carbon atoms is neither a single nor a double bond. Rather, all of the bonds are a hybrid of a single and double bond. In benzene, the pi bonding electrons are free to move completely around the ring. Delocalized electrons are electrons that are not confined to the bond between two atoms, but are instead allowed to move between three or more. The delocalization of the electrons in benzene can best be shown by showing benzene with a ring inside the hexagon, with the hydrogen atoms understood. Q: What type of electrons are electrons that are not confined to the bond between two atoms? Choices: - virtualized - detached - internalized - delocalized A:
delocalized
Answer the following question given this paragraph: Earthworms are deposit feeders. They burrow through the ground, eating soil and extracting organic matter from it. Earthworm feces, called worm casts, are very rich in plant nutrients. Earthworm burrows help aerate soil, which is also good for plants. Q: What type of feeders are earthworms? Choices: - middle - top - oil - deposit A:
deposit
Q: Answer the following question given this paragraph: Photography by Kat. Ferns are common in the understory of the tropical rainforest . CC BY 2.0. Q: In a tropical rainforest, where are ferns common? Choices: - forrest floor - emergent - canopy - understory A:
A: understory
Question: Answer the following question given this paragraph: Mollusks have a circulatory system with one or two hearts that pump blood. The heart is a muscular organ that pumps blood through the circulatory system when its muscles contract. The circulatory system may be open or closed, depending on the species. Q: The heart is a muscular organ that pumps blood through which system? Choices: - endocrine - pulmonary - nervous - circulatory A:
Answer: circulatory
*Question*
Answer the following question given this paragraph: Modern seed plants include gymnosperms and angiosperms. Q: Gymnosperms and angiosperms are types of _________ seed plants. Choices: - heritage - extinct - genetic - modern A:
**Answer**
modern
*Question*
Answer the following question given this paragraph: Evolution occurs in a population when allele frequencies change over time. What causes allele frequencies to change? That question was answered by Godfrey Hardy and Wilhelm Weinberg in 1908. Q: What kind of change causes evolution in population? Choices: - morphogenesis frequency changes - paragenic frequency changes - transgenic frequency changes - allele frequency changes A:
**Answer**
allele frequency changes