Conditions on Earth Change Over Time

question 41

Multiple Choice

Conditions on Earth change over time. How do organisms survive these changes?

• A) They don't. Everything eventually goes extinct.
• B) Species mutate as a result of the changes in conditions
• C) It's just a matter of luck. And some organisms can move to a suitable place.
• D) Individuals with traits that suit the conditions do well and those traits increase in the population.
• E) Species with traits that suit the conditions do well and the rest die.

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Definitions:

Vasoconstriction

The constriction of blood vessels that elevates blood pressure and diminishes blood circulation to specific regions.

Thromboxane

Specific class of physiologically active fatty acid derivatives present in many tissues.

Endothelin

A potent vasoconstrictive peptide produced by vascular endothelial cells that regulates blood vessel tone and blood pressure.

Connective Tissue

Tissue that supports, connects, or separates different types of tissues and organs in the body, characterized by few cells and extensive extracellular matrix.