She could only observe a nucleus in a eukaryotic cell. Prokaryotic cels do not have a nucleus, but the eukaryotic cell does.
All living organisms are made from different combinations of only 20 amino acids.
<em>Side note: there is research to support 21 amino acids. But I believe your answer will be 20.</em>
Answer:
B. It is the primary molecule in which cells store and use energy.
Explanation:
ATP (adenosine triphosphate) is an energy-carrying molecule found in the cells of all living organisms. It provides the energy necessary for many functions, such as muscle contraction, nerve impulse propagation, chemical processes, etc. It consists of three main structures:
- the nitrogenous base called adenine
- the sugar called ribose
- a chain of three phosphate groups bound to ribose. This phosphate chain is the source of energy the cell uses.
Answer:
DNA changes occur primarily because of natural errors that occur during the DNA replication process. They also can happen when one or more environmental factors act on the DNA. Jul 24 2019
Explanation:
The answer is true light is one of the forms of electromagnetic energy.
