Which factor activates a convection current, starting the flow of a fluid?

cold temperatures at the north pole

iron-rich rocks in the mantle

heated liquids at Earth's surface

temperature differences in the mantle

During the fasted state proteins can be used for energy. where do these proteins come from?

Where does the heat for geothermal energy come from?

During which era did plants first appear on land? Cenozoic Mesozoic Paleozoic Precambrian

Which of the following BEST describes the role of exogenous DNA therapy in medical research? A. enhancing and promoting desirable genetic characteristics B. altering genetic makeup and creating new protein products C.

Why did Gregor Mendel choose to use purebred plants in his experiments?

Which terms below are associated with communication between neurons? chemical signals, electrical signals, synapse chemical signals, synapse, neurotransmitters synapse, electrical signals, chemical signals synapse, electrical signals,

What did Thomas Hunt Morgan discover?

A negative feedback loop works by turning off the stimulus that initiated the feedback loop. True False

Why are groups of small cells better then one large cell at moving material in and out

Great white shark cheetha african daisy! who named it, when was it, and what does the name mean? c. what other organisms is it closely related to? d. what is the scientific name for humans?