All of the Following Are True of the Differences Between

question 16

Multiple Choice

All of the following are true of the differences between arteries and veins except

• A)veins have one-way valves, but arteries do not.
• B)arteries have a thicker tunica media than veins.
• C)veins collapse when empty, but arteries remain rounded.
• D)veins have a thicker tunica externa than arteries.
• E)All of these are true of the differences between arteries and veins.

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Definitions:

Ecological Pyramids

Graphical representations showing the relative amounts of energy or matter contained within each trophic level in a given ecosystem.

Pyramid of Numbers

A graphical representation showing the number of organisms at different trophic levels in an ecosystem, typically decreasing from producers to top predators.

Photosynthesis

The process by which green plants and certain other organisms transform light energy into chemical energy, using carbon dioxide and water to produce glucose and oxygen.

Animal Respiration

The process by which animals exchange gases with their environment, taking in oxygen and releasing carbon dioxide, typically involving lungs or gills.