End of chapter 2 questions

Question 1

which of the following is NOT a characteristic of plants?
A: cells contain chloroplasts
B: cell wall made of cellulose
C: bodies are multicellular
D: store carbohydrate as glycogen

Answer 1

D: store carbohydrate as glycogen

Question 2

fungi carry out saprotrophic nutrition. what is the meaning of this term?
A: extracellular digestion of dead organic matter.
B: feeding on other living organisms
C: making organic molecules photosynthesis
D: secreting digestive enzymes

Answer 2

A: extracellular digestion of dead organic matter.

Question 3

below are three groups of organisms:
1. viruses
2. bacteria
3. yeasts
which of these organisms are prokaryotic?
A: 1 only
B: 2 only
C: 1 and 2
D: 1, 2 and 3

Answer 3

B: 2 only

Question 4

which of the following diseases is not caused by a virus?
A: influenza
B: measles
C: malaria
D: AIDS

Answer 4

C: malaria

Question 5

name the kingdom to which each of the following organisms belongs.
1. mushroom
2. Chlorella
3. moss
4. Lactobacillus

Answer 5

1. fungi
2. protoctists
3. plants
4. bacteria

Question 6

explain why a the protoctist euglena is classified as a protoctist and not an animal or plant.

Answer 6

like most protoctists, euglena is a microscopic, single-celled organism. it has features of both plant and animal cells: like plants, it contains chloroplasts; like animals, it can move.

Question 7

is a virus a living organism? explain your answer.

Answer 7

a virus can be considered either as living or as a chemical. it does not have any of the normal characteristics of living things, except that it is able to reproduce.

Question 8

explain the statement ‘viruses are all parasites’.

Answer 8

viruses can reproduce only inside a host cell, by taking over the cell’s genetic machinery to make more virus particles. so all viruses are parasites.

Question 9

explain the meanings of the following terms:
a. invertebrate
b. hyphae
c. saprotrophic

Answer 9

a. an animal that does not have a vertebral column (backbone).
b. fine, thread-like filaments forming the feeding network of cells of a fungus.
c. a type of nutrition used by most fungi and some bacteria, where the organism feeds on dead organic material by digesting it using extracellular enzymes.