BIOLOGY 12E CONNECT ACCESS CARD
12th Edition
ISBN: 9781264938513
Author: Raven
Publisher: MCG
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Textbook Question
Chapter 10, Problem 1U
Binary fission in prokaryotes does not require the
a. replication of DNA.
b. elongation of the cell.
c. separation of daughter cells by septum formation.
d. assembly of the nuclear envelope.
Expert Solution & Answer
Summary Introduction
Introduction:
“Binary fission” in prokaryotes is a process of the division of the parent cell into two daughter cells. This leads to the division of the genetic material like chromosomes inside the cell. The nuclear envelope is absent in the prokaryotes and the chromosomes are present in a region of nucleoid inside the cytoplasm.
Answer to Problem 1U
Correct answer:
Binary fission in prokaryotes is the process of the separation of the chromosomes and their replication during the division of the parent cell into two daughter cells. The prokaryotes do not have a nucleus and therefore assembly of the nuclear envelope does not take place. Therefore, option d. is correct.
Explanation of Solution
Reason for the correct statement:
The prokaryotes do not have a nucleus the nuclear material is suspended in the cell and is termed as the nucleolus and the formation of the nuclear assembly does not take place during the process of binary fission.
Option d. is given as “assembly of the nuclear envelope”.
As, “the nucleus and nuclear envelope are absent in the prokaryotes therefore the process of binary fission involves only the replication and separation of the chromosomes after the division of the parent cell into two daughter cells” is the right answer.
Hence, option d. is correct.
Reasons for the incorrect statements:
Option a. is given as “replication of
Replication of
Option b. is given as “elongation of the cell”.
The elongation of the parent cell takes place before cell division. So, it is a wrong answer.
Option c. is given as “separation of daughter cells by septum formation”.
The septum is formed in between the two daughter cells which helps in the formation of the separate cells during binary fission. So, it is a wrong answer.
Hence, options a., b., and c. are incorrect.
Conclusion
The binary fission process involves the division of the parent prokaryotic cell into two daughter cells with replication and separation of the chromosomes. The nucleus and nuclear envelope are absent in the prokaryotes and the chromosomes are present as nucleoid in the cytoplasm.
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Explain down bellow what happens to the cell in pictures not in words:
Decreased pH in mitochondria
Increased ATP
Decreased pH in cytosol
Increased hydrolysis
Decreasing glycogen and triglycerides
Increased MAP kinase activity
Poor ion transport → For each one:→ What normally happens?→ What is wrong now?→ How does it mess up the cell?
1.) Community Diversity:
The brown and orange line represent two different plant communities.
a. Which color represents the community with a higher species richness?
b. Which color represents the community with a higher species evenness?
Relative abundance
0.1
0.04
0.001
2 4 6
8
10 12 14 16 18 20 22 24
Rank abundance
c. What is the maximum value of the Simpson's diversity index (remember, Simpson's
index is D = p², Simpson's diversity index is 1-D)?
d. If the Simpson's diversity index equals 1, what does that mean about the number of
species and their relative abundance within community being assessed?
1.) Community Diversity:
The brown and orange line represent two different plant communities.
a. Which color represents the community with a higher species richness?
b. Which color represents the community with a higher species evenness?
Relative abundance
0.1
0.04
0.001
2 4 6
8
10 12 14 16 18 20 22 24
Rank abundance
c. What is the maximum value of the Simpson's diversity index (remember, Simpson's
index is D = p², Simpson's diversity index is 1-D)?
d. If the Simpson's diversity index equals 1, what does that mean about the number of
species and their relative abundance within community being assessed?
Chapter 10 Solutions
BIOLOGY 12E CONNECT ACCESS CARD
Ch. 10.1 - Prob. 1LOCh. 10.2 - Prob. 1LOCh. 10.2 - Distinguish between homologues and sister...Ch. 10.2 - Prob. 3LOCh. 10.3 - Describe the eukaryotic cell cycle.Ch. 10.4 - Prob. 1LOCh. 10.4 - Prob. 2LOCh. 10.5 - Describe the phases of mitosis.Ch. 10.5 - Explain the importance of metaphase.Ch. 10.5 - Compare cytokinesis in plants and animals.
Ch. 10.6 - Prob. 1LOCh. 10.6 - Prob. 2LOCh. 10.7 - Prob. 1LOCh. 10.7 - Prob. 2LOCh. 10 - Binary fission in prokaryotes does not require the...Ch. 10 - Chromatin is composed of a. RNA and protein. b....Ch. 10 - What is a nucleosome? a. A region in the cells...Ch. 10 - What is the role of cohesin proteins in cell...Ch. 10 - The kinetochore is a structure that functions to...Ch. 10 - Separation of the sister chromatids occurs during...Ch. 10 - Why is cytokinesis an important part of cell...Ch. 10 - What steps in the cell cycle represent...Ch. 10 - Cyclin-dependent kinases (Cdks) are regulated by...Ch. 10 - Prob. 2ACh. 10 - Genetically, proto-oncogenes act in a dominant...Ch. 10 - The metaphase to anaphase transition involves a....Ch. 10 - The main difference between bacterial cell...Ch. 10 - In animal cells, cytokinesis is accomplished by a...Ch. 10 - Regulation of the cell cycle is very complex and...Ch. 10 - Review you knowledge of signaling pathways...Ch. 10 - Compare and contrast how mutations in cellular...
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