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Chapter 23: Q 1. (page 606)


What evidence is there that mitochondria were incorporated into the ancestral eukaryotic cell before chloroplasts?

Short Answer

Expert verified

Chloroplast is present in only green plants that prepare their own food by photosynthesis.

Step by step solution

01

Introduction

Mitochondria

  • It is a cell organelle present in eukaryotes.
  • They generate energy in the form of ATP.

Chloroplast

  • It is a cell organelle present only in plant cells.
  • They are the sites of photosynthesis.
02

Evidence

The fact that mitochondria are found in all eukaryotes but chloroplasts are only found in green plants capable of making their own food by photosynthesis is evidence that mitochondria were introduced long earlier than chloroplasts in the original eukaryotes.

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Most popular questions from this chapter

Which of the following observations about a bacterium would distinguish it from the last eukaryotic common ancestor?


a. A double-stranded DNA genome
b. Lack of a membrane-bound structure surrounding the genome
c. Fatty acids in the lipid bilayer of the plasma membrane
d. Enclosed by a cell wall

Opisthokonta includes animals and fungi, as well as protists. Describe the key feature of this phylum, and an example of how an organism in each kingdom uses this feature.

Which of these locomotor organs would likely be the shortest?

a. a flagellum
b. a cilium
c. an extended pseudopod
d. a pellicle

What genus of protists appears to contradict the statement that unicellularity restricts cell size?

a. Dictyostelium

b. Ulva

c. Plasmodium

d. Caulerpa

Which of the following statements about the Laminaria life cycle is false?

  1. 1n zoospores form in the sporangia.

  2. The sporophyte is the 2n plant.

  3. The gametophyte is diploid.

  4. Both the gametophyte and sporophyte stages are multicellular.
See all solutions

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