Question

1-Some microorganisms can undergo ________ in which various cell types can become specialized and arise from one parent cell type. a. A) differentiation

b. B) genetic exchange
c. C) maturation
d. D) mutagensis

2- Major classes of macromolecules present in all living microorganisms include

a. amino acids, carbohydrates, lipids, and nucleic acids.
b. cell wall, cytoplasmic membrane, nucleoid, and ribosomes. c. genes, proteins, and vitamins.
d. inorganic and organic compounds.

3- Microbial cells first evolved on Earth approximately ________ billion years ago.

a. 1.6 to 1.8

b. 3.8 to 3.9

c. 5.4 to 5.6

d. 7.0 to 7.2

4- The first documented description of a microorganism was of a ________ by ________.

a. bacterium / Ferdinand Cohn

b. fungus / Robert Koch
c. mold / Robert Hooke
d. yeast / Martinus Beijerinck

Answer 1

1. The correct answer is A

2. The correct answer is A. (A cell is chemically composed of Carbohydrate , protein, lipids and nucleic acids on a molecular level)

3. The correct ansanswis A. (The microorganisms firstfevolved on Earth around 1.8 to 2 billion years ago.)

4. The correct answer is B. (While Antonio Van Leeuwenhoek is often referred to as the first to observe microbes, but the document says in 1665, Robert Hooke first recorded microscopic observation of the fruiting bodies of moulds)