In sucrose loading into the phloem, which material is pumped out of the companion cell to set-up a concentration gradient?
H+
Sucrose
H2O
ATP

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

What is one way intensive agriculture can contribute to climate change? a. tree loss to agriculture increases earth's albedo b. livestock manure absorbs greenhouse gases c. large herds of livestock release greenhouse gases d. fewer trees are available to replenish petroleum stores appex

What was darwins theory of common decent