The youngest would be the ones at the top and the oldest would be at the bottom. the oldest is B and the ones around it, as they get bigger get younger. hope this helps :)
The unit is the Watt. S.I. unit = W
A, because plant cells do have membrane-bound nuclei. they have chloroplasts, so that isn't it. Plants don't use oxygen for photosynthesis, but carbon dioxide. The plant walls are made up of cellulose,, not lipids. It must be A.
The kidneys ureters, bladder, and urethra make up the urinary system. They all work together to filter, store and remove liquid waste for your body. Hope this helps have a great day
Answer:
Explanation:
can be observed and measured without changing composition (just say comp.), are used to observe and describe
