Two Ways in Which Concentrations of CO₂ Million of Years

question 10

Multiple Choice

Two ways in which concentrations of CO₂ million of years ago can be reconstructed is from the density of stomata in fossilized leaves and _____

• A) isotopic content of carbon in fossils
• B) ice cores
• C) tree rings
• D) orbital changes of the Earth around the Sun

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Definitions:

Milliseconds

A unit of time equal to one thousandth of a second, often used to measure very short durations, especially in scientific contexts.

Absolute Refractory Period

A phase during which a neuron is incapable of firing again immediately after an action potential, ensuring the signal only moves in one direction.

Action Potentials

Quick, electrical impulses that travel down a neuron's axon, allowing neurons to communicate with each other.

Synaptic Interval

The gap between neurons across which neurotransmitters travel to transmit signals from one neuron to the next.