The History of Continental Drift on Earth Has

question 44

Multiple Choice

The history of continental drift on Earth has

• A)allowed for speciation to occur.
• B)allowed for both speciation and extinction to occur.
• C)caused speciation rates to exceed extinction rates.
• D)caused speciation to equal extinction rates.

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Definitions:

Protein Kinase C

An enzyme that modifies the function of proteins by chemically adding phosphate groups to them, playing a role in various cell signaling pathways.

Plasmodesmata

Microscopic channels that traverse the cell walls of plant cells and some algae, facilitating communication and transport between individual cells.

Signal Molecules

Chemicals produced by cells that are used to communicate with or signal other cells, leading to changes in cellular activities.

Phospholipase C

An enzyme that plays a key role in cell signaling, breaking down phospholipids to generate second messengers like diacylglycerol and inositol triphosphate.