AP BIOLOGY

THE CELL

CELL THEORY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Cara and Chuck were looking at pond water through a microscope. They saw small square crystals in their slide. Cara wondered what it was. Chuck said it could not be any living thing because it was not ____
A
round
B
moving
C
small enough
D
made of cells
Explanation: 

Detailed explanation-1: -chuck said it could not be any living thing because it was not made of cells. Cell is the basic structural and functional unit of all living organisms. All living organisms are made up of many cells that functions together, and they are either unicellular or multicellular organisms.

Detailed explanation-2: -compound microscope, dissecting scope (for larger organisms) or digital microscope for Mac or Windows. pond water. clean microcope slide. clean cover slip.

Detailed explanation-3: -In 1674, Leeuwenhoek discovered free living cells in the pond with the help of an improved version of microscope. Leeuwenhoek observed living cells such as human sperm, RBC, protozoa and bacteria for the first time.

There is 1 question to complete.