The diagram represents a plant cell in tap water as seen with a compound light microscope. Which diagram best represents the appearance of the cell after.

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The diagram represents a plant cell in tap water as seen with a compound light microscope. Which diagram best represents the appearance of the cell after it has been placed in a 15% salt solution for two minutes? (1) (2) (3) (4)

Plants use this to breathe! BTW… Plants use this to breathe!

Guard cells open or close stoma using osmosis.

Cells use two types of chemical messages: Neurotransmitters – produced by neurons Hormones- produced by endocrine glands

Cells use two types of chemical messages: Neurotransmitters – produced by neurons Hormones- produced by endocrine glands

http://www.tvdsb.on.ca/westmin/science/sbioac/homeo/synapse.htm

Nerve messages are fast.

Nerve messages are fast.

Nerve messages are fast. Nerve messages do not last long.

Nerve messages are fast. Nerve messages do not last long.

Nerve messages are fast. Nerve messages do not last long. Nerve messages are very specific.

Nerve messages are fast. Nerve messages do not last long. Nerve messages are very specific.

The process represented in the diagram best illustrates cellular communication (2) muscle contraction (3) extraction of energy from nutrients (4) waste disposal Which statement best describes the diagram? Nerve cell X is releasing receptor molecules. (2) Nerve cell Y is signaling nerve cell X. (3) Nerve cell X is attaching to nerve cell Y. (4) Nerve cell Y contains receptor molecules for substance A.

Endocrine glands are scattered throughout the body They send their messages—hormones—to target cells through the bloodstream.

Hormones act slowly.

Hormones act slowly.

Hormones act slowly. Hormones last a long time.

Hormones act slowly. Hormones last a long time.

Hormones act slowly. Hormones last a long time. Hormones are not very specific.

Hormones act slowly. Hormones last a long time. Hormones are not very specific.

Which statement is the most accurate? Hormone A and Hormone B are chemical messages produced by two different endocrine glands in the body. Cells 1, 2 & 3 are found in different parts of the same body. Which statement is the most accurate? (1) Cell 1 is a target cell for Hormone B but not Hormone A (2) Cell 2 is a target cell for Hormone A exclusively (only) (3) Cell 3 is target cell for Hormone A but not Hormone B (4) Cell 1 is a target cell for Hormone A exclusively