单项选择题

Besides their source of energy, what is major difference between archaean and bacteria

A．Their genetics.
B．Their size.
C．What they look like.
D．The amount of energy they nee
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单项选择题
What is the woman's project mainly about
A．How hydrothermal vents are formed.
B．How living things get energy from sunlight.
C．The harmful effects of certain chemicals in the ocean.
D．Microorganisms that get energy from chemical reactions.
单项选择题
According to the woman, where are the hydrothermal vents found
A．In caves.
B．On the ocean floor.
C．Far below the Earth's crust.
D．Inside archae
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