Please continue the question. Or is that it?
The membrane bound organelle you refer to is the Lysosome. The lysosome fuses with a vacuole where it digest the contents.
Answer:
You’re answer is C
Explanation:
Atoms consist of three basic particles: protons, electrons, and neutrons. The center on the atom is called the Nucleus.
Answer:
What Keene High school students are you reading about? And what scientist are you talking about? If you had given more information I would have helped. Anyways, just look at what it says in the book that the scientist did, and what the Keene high school students did. And see what they both have in common.
The right answer is vein (it contains blood and has valves).
The infra-cardiac veins of small and medium caliber possess this system of fight against gravity. The valves consist of a dense connective tissue, surmounted by endothelial cells, corresponding to a fold of the intima. They allow blood circulation in the sense organ / heart but prevent venous reflux.
