Help please Identify the processes that occur during the electron transport chain.

Select all that apply.

- Protons are moved across a membrane against their concentration gradient.
- Carbon dioxide is released.
- Oxygen is produced as a waste product.
- Electrons are removed from the carrier molecules NADH and FADH2.

As a small change in a person's dna can cause a genetic disorder

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a. earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c. earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.

During binary fission, what events must occur before the cell splits into two new cells?