Osmosis is the diffusion of which of the following across a membrane?

a. Water
b. Solutes
c. Gradients
d. Proteins


a. Water

Osmosis is the diffusion of water—and only water—across a membrane.

Biology & Microbiology

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Water enters the water vascular system of a sea star through a structure called the ____

a. ampulla b. ossicle c. radial canal d. ring canal e. madreporite

Biology & Microbiology

Nitrogen is released into the atmosphere by ____

a. nitrogen fixation b. denitrification c. nitrification d. ammonification e. decomposition

Biology & Microbiology

Which molecule in the Krebs cycle acts as a substrate of the first reaction and is a product of the last reaction?

1.pyruvate 2.acetyl-coenzyme A 3.citrate 4.oxaloacetate

Biology & Microbiology

Which of the following is not caused by Haemophilus influenzae?

What will be an ideal response?

Biology & Microbiology