By which of the following mechanisms can a cell transport a substance from a lower to a higher concentration?

A) facilitated diffusion

B) aquaporins

C) extracellular enzymes

D) active transport

E) simple diffusion

Which rock type appeared first on Earth? Why?

Which organ is involved in ingestion

Drag the tiles to the correct boxes to complete the pairs. Match each nutrient to its description. fiber cholesterol calcium phosphorous vitamin E carbohydrate that slows the absorption of sugars into the bloodstream mineral found in every cell of

The restriction enzymes of bacteria protect the bacteria from successful attack by bacteriophages, whose genomes can be degraded by the restriction enzymes.

Is a red blood cell more specialized than an amoeba, or is it the other way around?

Q: A: Which numbered organelle produces ATP during cell respiration

From earliest to most recent, what is the correct order in which organisms appear in the fossil record? a. dinosaurs, invertebrates, reptiles, mammals b. invertebrates, amphibians, dinosaurs, mammals c.

Is it possible for technological advancements to have both positive and negative effects on the world

The plasma membrane (cell membrane) is made up of a (n)

In a plants stem the vascular tissue is A. is always arranged in rings of vascular bundles B. is continuous from the roots to thel leaves C. carriers nutrients up the stem but not down D. plays a role in photosynthesis and storage.