The Big Bang Occurred

question 24

Multiple Choice

The Big Bang occurred

• A)about 15 to 20 billion years ago.
• B)about 5 to 7 thousand years ago.
• C)about 4 to 6 billion years ago.
• D)infinitely far in the past.

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Definitions:

Glucose Transport

The process of moving glucose molecules across cell membranes, often involving specific transporter proteins, to supply cells with energy.

Concentration Gradient

The process of particles, which are sometimes called solutes, moving through a solution or gas from an area with a higher number of particles to an area with a lower number of particles.

Plasmolysis

A process in which cells lose water in a hypertonic solution, causing the cell membrane to detach from the cell wall, typically observed in plants.

Pinocytosis

Cell drinking; a type of endocytosis by which cells engulf and absorb droplets of liquids. Compare with phagocytosis and receptor-mediated endocytosis.