Guard Cells Are the Only Cells in the Epidermis That

question 39

Multiple Choice

Guard cells are the only cells in the epidermis that contain chloroplasts and can undergo photosynthesis. This is important because

• A) chloroplasts sense when light is available so that guard cells will open.
• B) photosynthesis provides the energy necessary for contractile proteins to flex and open the guard cells.
• C) guard cells will produce the O₂ necessary to power active transport.
• D) ATP is required to power proton pumps in the guard cell membranes.
• E) chloroplasts sense when light is available so that guard cells will open and guard cells will produce the O₂ necessary to power active transport.

Understand the concept and calculation of statistical significance.

Know the basic elements of setting up and analyzing data from surveys.

Appreciate the role of standard deviation and standard error in the interpretation of statistical data.

Recognize that a significant correlation does not imply causation.

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Definitions:

Tracheal Tubes

A system of small tubes in insects that carries oxygen directly to tissues and organs.

Exoskeleton

A rigid external covering that supports and protects the bodies of certain animals, such as insects, crustaceans, and some mollusks.

Echinodermata

A phylum of marine animals including sea stars, sea urchins, and sea cucumbers, characterized by radial symmetry and a unique water vascular system.

Echinoderms

A phylum of marine animals that includes starfish, sea urchins, and sea cucumbers, characterized by radial symmetry and a unique water vascular system.