What is the first step of thermonuclear fusion within the Sun to form helium-4? 1. The fission of hydrogen to form protons and neutrons.
2. Two lithium atoms, each with three protons and three neutrons, undergo fission to form hydrogen atoms with one proton and one neutron.
3. Two hydrogen nuclei, each with only one proton, fuse to form deuterium, a form of hydrogen with one proton and one neutron.
4. Electrons and protons fuse to form the nucleus of a helium atom.

What if the yeast were extremely active and produced more than 100ml gas. would you know? why/why not

Question 1 which of the following allows cells to take in fluids? a. phagocytosis b. pinocytosis c. exocytosis d. receptor-mediated endocytosis question 2 molecules move along their concentration gradient (from areas of high concentration to low concentration) using active transport mechanisms. a. true b. false question 3 which of the following powers active transport (ie. provides the energy for)? a. glucose b. transport proteins c. atp d. phospholipids question 4 what type of lipid is a major component of the plasma membrane? a. cholesterol b. phosopholipids c. proteins d. triglycerides

Write a paragraph explaining how energy flows through an ecosystem using the following terms: energy pyramid, trophic level, producer, primary consumer, decomposer, sun, secondary consumer, and tertiary consumer. .