Identify the statements that compose the cell theory.
(select all that apply)

a)all organisms are composed of one or more cells.
b)all cells have membrane-bound structures that have certain functions.
c)all cell come from predicting cells.
d)the cell is the basic unit of organization on organisms.

A)All organisms are composed of one or more cells.

B)All cells have membrane-bound structures that have certain functions.

D)The cell is the basic unit of organization on organisms.

Explanation:

Created by Mathias Scheiden and Theodor Schwann, Cell Theory involves the assertion that all living beings are formed by cells and that these cells have functional structures, which was possible as a result of the development of microscopy, being, today, a of the most important generalizations in the field of Biology.

In addition, according to cell theory, the cell is the smallest unit of life, and new cells are formed from the division of cells that already exist, and this process occurs from cell division. Another important pillar of this theory is the fact that the cell is the unit of reproduction and transmission of inherited characteristics, that is, all genetic characters transmitted from parents to children, are transmitted from one cell to another in the process of reproduction.

In summary, cell theory states that:

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.