The first living organisms appeared on Earth approximately
a. 4.6 billion years ago.
b. 3.8 billion years ago.
c. 1 billion years ago.
d. 6400 years ago.
b
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What is the benefit of using the Earth’s magnetic field to migrate compared to the sun or stars? What will be an ideal response?
A mature maple tree can have a mass of 1 ton or more (dry biomass, after removing the water), yet it starts from a seed that weighs less than 1 gram. Which of the following processes contributes the most to this huge increase in biomass?
What will be an ideal response?
Compared to when the Na+ channel is closed, how will the transport of Waste molecules change when the Na+ channel is open? The rate of Waste transport out of the cell will:
a) Increase b) Decrease c) Not change
A cell's boundary is defined by its __________.
Fill in the blank(s) with correct word