Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 27, Problem 5TYU
Summary Introduction
To review:
The logic behind the claim that states the nuclear envelope is a synapomorphy that defines eukaryotes as a monophylectic group.
Introduction:
The synapomorphy is the property of the ancestral species, which is passed to their evolutionary descendants in more or less altered form. One such synapomorphy in the eukaryotes is the nuclear envelope.
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A)
A major difference between eukaryotic cells and prokaryotic cells is that eukaryotic cells
Group of answer choices
exhibit little if any compartmentalization of function
are generally smaller than prokaryotic cells
have a large degree of internal organization
lack organelles
have little if any internal organization
B)
Which of the following statements about protists is false?
Group of answer choices
Some protists are mixotrophic
Certain protists share a common ancestor with land plants
Some protists are photosynthetic prokaryotes which are similar to the
ancestral chloroplast
Protists are a polyphyletic group of organisms that often bear little resemblance to each other
Although most protists are unicellular, some protists are multicellular as well
a) Describe some characteristics and differences between prokaryotic and eukaryotic cells.b) How do the three domains of life differ from one another?c) Two of the organelles in eukaryotes, the mitochondrion and the chloroplast are believed to haveoriginated through a process of symbiosis. Discuss some of the theories of the origins ofmitochondria and chloroplasts
Under the endosymbiotic theory for the origin of the eukaryotic cell. The ancestor of mitochondria and chloroplasts original became part of mutualism with a larger host cell. Which of the following best explains this mutualism?
A) The mitochondria and chloroplasts provided specialized reproduction as part of the proto-germ line while the larger host cell provided energy for growth and reproduction.
B) The mitochondria and chloroplasts provided gene products that could be used by the larger host cell for improved parasitization.
C) The mitochondria and chloroplasts provided molecular energy in return for protection by the larger host cell.
D) The mitochondria and chloroplasts produce toxins that the larger cell utilized to defend itself from other cells mutually increasing the defense of all those involved.
Chapter 27 Solutions
Biological Science (7th Edition)
Ch. 27 - Why are protists considered paraphyletic? a. They...Ch. 27 - 2. The most important primary producers in marine...Ch. 27 - Prob. 5TYUCh. 27 - Prob. 6TYUCh. 27 - Prob. 7TYUCh. 27 - 8. The text claims that the evolutionary history...Ch. 27 - Prob. 9TYPSSCh. 27 - Prob. 10TYPSSCh. 27 - Does a slime mold “know” where it’s going?
When...Ch. 27 - Prob. 12PIAT
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- Name the four main groups of eukaryotesarrow_forwardDescribe conjugation as it occurs in ciliates. What is the fate of the micronucleus and the macronucleus during this process?arrow_forward50) Some protists, formerly united as the ʺamitochondriateʺ clade, have recently been shown to be rather diverse. Some of them possess neither mitochondria nor mitochondrial genes (and have been classified as fungi). Others possess no mitochondria, but do have mitochondrial genes in their nuclear genome. Still others have modified mitochondria (viz. mitosomes or hydrogenosomes). Which statement(s) represent(s) consequences of these recent findings? 1. The amitochondriates do not comprise a true clade. 2. The ʺamitochondriate hypothesisʺ concerning the root of the eukaryotic tree has been strengthened. 3. Just as there is a diversity of cyanobacterial descendants among eukaryotes, so too is there a diversity of alpha-proteobacterial descendants among the eukaryotes. 4. If the amitochondriate organisms continued to be recognized as a taxon, this taxon would be polyphyletic. 5. Horizontal gene transfer involving mitochondrial genes has occurred in some amitochondriate organisms. A) 1 only…arrow_forward
- Is protist dna in a nucleus unicellular or multicellular?According to the phylogeny presented in this chapter which protists are in the same eukaryotic supergroup as plants a) green algae b) dinoflagellates c) red algaed both a and c in a lifecycle with alternation of generations multicellular haploid forms alternate with a unicellular haploid forms b unicellular diploid formsc multicellular haploid forms d) multicellular diploid formsarrow_forwardWhat should be the main consideration/s in grouping this diverse group of unicellular eukaryotes?arrow_forwardExplain why unicellular eukaryotes are neither plants nor animals.arrow_forward
- Put a checkmark (1) on the group where each of the following structures are present. Cellular Structures Plantae Animalia FungiProtista Monera 1. Nucleus 2. Nucleoid 3. Nucleolus 4. Ribosomes 5. Golgi Body 6. Endoplasmic reticulum 7. Plasma membrane 8. Centriole 9. Cell wall 10. Chloroplast 11. Mitochondria 12. Cytoplasm 13. Cytoskeleton 14.Pigments 15. DNAarrow_forwardName 4 structures unique to prokaryotic cells. Give the function/adaptation of each.arrow_forwardAmong the two diagrams, what is the most parsimonious tree? Are they equal? Why or why not?arrow_forward
- List and describe the four main groups of eukaryotes.arrow_forwardThe endosymbiotic theory pertains to which organelle within eukaryotes because of the presence of 70S ribosomes, circular DNA, and the replication of this organelle independent from mitosis? O 1) nucleus O 2) lysosomes. O 3) golgi 4) endoplasmic reticulum 5: O 5) mitochondriaarrow_forwardDescribe features you would look for under the microscope to determine if a cell is prokaryotic or eukaryotic. If you knew your specimen belonged to Kingdom Protista, would that make it a prokaryote or a eukaryote?arrow_forward
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