Which of the following is considered to be the safest drinking water source?

A- a river
B- a lake
C- the groundwater
D- the ocean
E- melted snow


C- Groundwater

Biology & Microbiology

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In times of stress, the sympathetic nervous system decreases blood pressure

Indicate whether the statement is true or false.

Biology & Microbiology

In the light-independent reactions, _____

a. carbon dioxide is fixed b. ATP forms c. sugars form d. CO2 accepts electrons e. [ATP forms] and [sugars form ] f. [carbon dioxide is fixed ] and [sugars form ]

Biology & Microbiology

What is the central control organ of a nervous system?

A. Notochord B. Brain C. Nerve cord D. Ganglia E. Nerve

Biology & Microbiology

Both chemiosmosis and photophosphorylation involve (electron/proton/hydroxyl) gradients.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology