There are 5 levels of cell organization recognized by biologists.
A is your answer I believe because they do indeed provide a way to review other scientists work and or experiments
Chloroplast and mitochondria. Because both organelles are roughly the same size and shape as bacteria, have their own double layer membrane, and mitochondria have dna, that they were engulfed by early cells and are now organelles.
In the light-dependent reactions, which take place at the thylakoid membrane, chlorophyll absorbs energy from sunlight and then converts it into chemical energy with the use of water. ... The lower energy form, NADP+, picks up a high energy electron and a proton and is converted to NADPH.
The largest vein in an animal's body is in fact the Vena Cava.
Hope I helped :)
