Chapter 27: Homework

The term "protist" lacks phylogenetic accuracy because it represents a paraphyletic group. Which of the following statements reflects the paraphyly of protist taxa?

Some eukaryotic lineages evolved from protists, and they are not called protists.

Which of the following is NOT true of protists?

They are a monophyletic group of organisms.

Which one of the following are characteristics of eukaryotic cells but not of prokaryotic cells?

relatively large genome, dynamic cytoskeleton, compartmentalized metabolic processes

Evidence that supports chloroplast origins from photosynthetic bacteria includes:

All three of these features provide evidence for the bacterial origin of chloroplasts.

Many single-celled eukaryotic organisms have evolved complex life cycles that include sexual reproduction. This means that:

at some point, two cells must fuse to become diploid.

The diversity of shapes found in eukaryotic cells is made possible by the:

cytoskeleton.

What components of eukaryotic cells leave a fossil record?

cell walls

Which one of the following is NOT part of the endomembrane system?

mitochondria

A cell with chloroplasts that have four membranes (not counting the thylakoid membranes) likely arose by _____ endosymbiotic event(s).

two