Which two structures perform similar functions in cnidarians and sponges?

spicules in cnidarians and pores in sponges
tentacles in cnidarians and nerve cells in sponges
stinging cells in cnidarians and cilia in sponges
gut in cnidarians and collar cells in sponges

answer; ///(statins)/aka as hmg coa

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.

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds