Which of the following cell parts are NOT found in BOTH plant and animal cells? A. mitochondria B. Cell membrane
C. Chloroplast
D. Nucleus

Identify the type of energy used in each action. the flexing of an arm muscle: a signal transduction process by a neuron: a ball at the top of a hill: 1. electrical energy 2. mechanical energy 3. gravitational potential energy

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?

Some substances but not other can cross the (blank) membrane of a cell