Question 12

a community is the set of all that inhabit a certain area.

ecosystems

biospheres

populations

none of the above
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question 13

which of the following is an aquatic biome?

taiga

grassland

marine

none of the above
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question 14

which of the following is a main type of community?

terrestrial

aquatic

both a and b

all of the above

How does the carbon cycle involve an exchange of carbon

What best explains whether bromine (br) or neon (ne) is more likely to form a covalent bond? bromine forms covalent bonds because it has seven valence electrons, but neon has eight valence electrons and already fulfills the octet rule. bromine forms covalent bonds because it has many electron shells, but neon has only two electron shells and is tightly bound to its electrons. neon forms covalent bonds because it can share its valence electrons, but bromine has seven valence electrons and can gain only one more electron. neon forms covalent bonds because it has only two electron shells, but bromine has many electron shells and will lose electrons in order to fulfill the octet rule.

Which are characteristics of flukes? check all that apply. a they are free living. b they are a type of flatworm. c they reproduce sexually. d they have eyespots. e they are segmented.