Anton Leeuwenhoek devised a primitive microscope to observe a sample of his tooth scrapings. How did this help contribute to cell theory? It helped to show that cells cannot independently function.
It helped to show that some bacteria can swim like fish.
It helped to show that some bacteria are just one cell.
It helped to show that cells can be created from thin air.

not too sure but maybe in the hot springs.

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.