E
biology sem 1
1
pretest: unit 2
question 15 of 34
1 point
how are hydrogen bonds related to polarity?
o
a. polar attractions are a type of hydrogen bonding.
o
b. polar bonds are an example of a hydrogen bond.
o
c. hydrogen bonds are an example of a polar bond.
d. hydrogen bonds are a type of polar attraction.

How do energy and matter move through an ecosystem? both energy and matter unidirectionally flow through an ecosystem. both energy and matter cycle within an ecosystem. matter unidirectionally flows through an ecosystem, whereas energy cycles within an ecosystem. energy unidirectionally flows through an ecosystem, whereas matter generally cycles within an ecosystem.