What process occurs at the boundary between the capillaries and the alveoli?

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water

Explain why the plants cortex would serve as the best food source for animals

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons