Adaption, evolution, variation are all causes of natural selection.
hope this helps..
brainliest..?
<span>The answer is letter D. Annual rings in woody stems are caused by an increase in rings of the secondary xylem. During the fall, the secondary xylem develops dense woods. Thin woods are develop during the spring which marks the formation of ring on its annual growth.</span>
Answer:
False
Explanation:
All bacteria contain peptidoglycan in the their cell wall; the major component of peptidoglycan is the N-acetylmuramic acid. The peptidoglycan in bacteria helps to protect the bacteria plasma membrane and cell as a whole from environmental stress as well as maintaining its cell morphology.
In this case, the unicellular organism that was discovered is most likely an archaea. Archaea are organisms that have a semi rigid cell wall with the absence of peptidoglycan.
I believe it's D. I m not for sure though. Hope it helps!
That would be A. CO2, ATP,NADH,FADH2. See attached pic.
