C8e_28_Test_Bank

C8e_28_Test_Bank - Biology, 8e (Campbell) Chapter 28...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Biology, 8e (Campbell) Chapter 28 Protists Multiple-Choice Questions 1) Protists are alike in that all are A) unicellular. B) eukaryotic. C) symbionts. D) monophyletic. E) autotrophic. Answer: B Topic: Concept 28.1 Skill: Knowledge/Comprehension 2) Biologists have long been aware that the defunct kingdom Protista is paraphyletic. Which of these statements is both true and consistent with this conclusion? A) Many species within this kingdom were once classified as monerans. B) Animals, plants, and fungi arose from different protist ancestors. C) The eukaryotic condition has evolved only once among the protists, and all eukaryotes are descendants of that first eukaryotic cell. D) Chloroplasts among various protists are similar to those found in prokaryotes. E) Some protists, all animals, and all fungi share a protist common ancestor, but these protists, animals, and fungi are currently assigned to three different kingdoms. Answer: E Topic: Concept 28.1 Skill: Knowledge/Comprehension 3) The strongest evidence for the endosymbiotic origin of eukaryotic organelles is the similarity between extant prokaryotes and which of the following? A) nuclei and chloroplasts B) mitochondria and chloroplasts C) cilia and mitochondria D) mitochondria and nuclei E) mitochondria and cilia Answer: B Topic: Concept 28.1 Skill: Knowledge/Comprehension 4) According to the endosymbiotic theory of the origin of eukaryotic cells, how did mitochondria originate? A) from infoldings of the plasma membrane, coupled with mutations of genes for proteins in energy-transfer reactions 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
B) from engulfed, originally free-living prokaryotes C) by secondary endosymbiosis D) from the nuclear envelope folding outward and forming mitochondrial membranes E) when a protoeukaryote engaged in a symbiotic relationship with a protobiont Answer: B Topic: Concept 28.1 Skill: Knowledge/Comprehension 5) Which of these statements is false and therefore does not support the hypothesis that certain eukaryotic organelles originated as bacterial endosymbionts? Such organelles A) are roughly the same size as bacteria. B) can be cultured on agar, because they make all their own proteins. C) contain circular DNA molecules. D) have ribosomes that are similar to those of bacteria. E) have internal membranes that contain proteins homologous to those of bacterial plasma membranes. Answer: B Topic: Concept 28.1 Skill: Application/Analysis 6) Which process allowed the nucleomorphs of chlorarachniophytes to be first reduced, and then (in a few species) lost altogether, without the loss of any genetic information? A) conjugation B) horizontal gene transfer C) binary fission D) phagocytosis E) meiosis Answer: B Topic: Concept 28.1 Skill: Knowledge/Comprehension 7) Which organisms represent the common ancestor of all photosynthetic plastids found in eukaryotes? A) autotrophic euglenids
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 23

C8e_28_Test_Bank - Biology, 8e (Campbell) Chapter 28...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online