31.3 The ancestor of fungi was an aquatic, single-celled, flagellated protist

Question 1

28) Which of these structures are most likely to be a component of both chytrid zoospores and
motile animal cells?
A) cilia
B) flagella
C) pseudopods
D) heterokaryons
E) haustoria

Answer 1

B) flagella

Question 2

29) Fossil fungi date back to the origin and early evolution of plants. What combination of
environmental and morphological change is similar in the evolution of both fungi and
plants?
A) presence of ʺcoal forestsʺ and change in mode of nutrition
B) periods of drought and presence of filamentous body shape
C) predominance in swamps and presence of cellulose in cell walls
D) colonization of land and loss of flagellated cells
E) continental drift and mode of spore dispersal

Answer 2

D) colonization of land and loss of flagellated cells

Question 3

30) Which of the following characteristics is shared by both chytrids and other kinds of fungi?
A) presence of flagella
B) zoospores
C) autotrophic mode of nutrition
D) cell walls of cellulose
E) nucleotide sequences of several genes

Answer 3

E) nucleotide sequences of several genes

Question 4

31) The multicellular condition of animals and fungi seems to have arisen
A) due to common ancestry.
B) by convergent evolution.
C) by inheritance of acquired traits.
D) by natural means, and is a homology.
E) by serial endosymbioses.

Answer 4

B) by convergent evolution.

Question 5

32) Asexual reproduction in yeasts occurs by budding. Due to unequal cytokinesis, the ʺbudʺ
cell receives less cytoplasm than the parent cell. Which of the following should be true of
the smaller cell until it reaches the size of the larger cell?
A) It should produce fewer fermentation products per unit time.
B) It should produce ribosomal RNA at a slower rate.
C) It should be transcriptionally less active.
D) It should have reduced motility.
E) It should have a smaller nucleus.

Answer 5

A) It should produce fewer fermentation products per unit time.