AP BIOLOGY

THE CELL

CELL THEORY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
An amoeba is a one-celled organism. Cell theory states that which of the following characteristics of amoebas must be true?
A
All amoebas come from other amoebas.
B
All amoebas have organelles called chloroplasts
C
All amoebas have a globular, undefined shape.
D
All amoebas move slowly, using a pseudopod.
Explanation: 

Detailed explanation-1: -An amoeba is a one-celled organism. The cell theory states that which of the following characteristics of amoebas must be true? All amoebas have a regular, spherical shape.

Detailed explanation-2: -The amoeba is made up of jellylike cytoplasm which differentiates to form a thin outer plasma membrane, a stiff layer of clear ectoplasm just inside the plasma membrane and a central endoplasm that is granular in nature. The endoplasm houses a granular nucleus, food vacuoles and a contractile vacuole.

Detailed explanation-3: -An amoeba, sometimes written as “ameba", is a term generally used to describe a single celled eukaryotic organism that has no definite shape and that moves by means of pseudopodia. Pseudopodia or pseudopods are temporary projections of the cell and the word literally means “false feet".

Detailed explanation-4: -An amoeba is classified as a unicellular organism since it is made up of only one cell.

Detailed explanation-5: -Cell theory has 3 basic points: All living things are made of one or more cells. The cell is the smallest living thing that can perform all the functions of life. All cells must come from pre-existing cells through cellular division.

There is 1 question to complete.