17. what is a main difference between plants and fungi?

* fungi lack cell walls, while plant cells have cell walls
* cell wall composition (chitin vs. cellulose)
* fungi depend on sunlight, while plants can exist in sun or without
* plants are heterotrophs, fungi are autotrophs

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.

i think its both a and b