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Chapter 8

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    Chapter 8 Chapter 8 Presentation Transcript

    • Mader's Concepts in Biology, First Edition Copyright © The McGraw-Hill Companies, InC) Permission required for reproduction or display. Sylvia S. Mader Chapter 8
    • Question 1
      • Cancer can best be described as:
      • A. foreign cells attacking an organ
      • B. uncontrolled cell division
      • C. cells from one organ invading another
      • D. cells which divide too slowly
      • E. cells which can no longer divide
    • Question 2
      • Which of the following statements is untrue of cancer?
      • A. cancer cells lose the specialization
      • B. cancer cells interfere with the normal action of other cells
      • C. cancer cells remain where they are formed
      • D. cancer is a genetic disorder
      • E. cancer cells divide uncontrollably
    • Question 3
      • Body cells are also known as germ cells.
      • A. true
      • B. false
    • Question 4
      • A scientist is studying reproduction in prokaryotes. Which type of reproduction would he or she be most likely be studying?
      • A. somatic reproduction
      • B. germ reproduction
      • C. sexual reproduction
      • D. gamete reproduction
      • E. asexual reproduction
    • Question 5
      • Sperm and egg are made from specialized cells called:
      • A. germ cells
      • B. asexual cells
      • C. somatic cells
      • D. binary cells
      • E. nucleoid cells
    • Question 6
      • Which of the following is not a reason why cell division is important in eukaryotes?
      • A. to repair damaged tissue
      • B. to replace old cells
      • C. to make extra copies of DNA to store for later use
      • D. to make new cells as the organism grows
      • E. to make new immune cells when the organism is sick
    • Question 7
      • A biologist is studying reproduction in bacteria. Which of the following terms best describes what he or she is studying?
      • A. germ fission
      • B. nucleoid fission
      • C. somatic fission
      • D. binary fission
      • E. gamete fission
    • Question 8
      • The greatest amount of day-to-day variation is produced by the process(es) of:
      • A. mitosis
      • B. meiosis
      • C. crossing-over
      • D. mutations and the regular cell cycle
      • E. meiosis and crossing over
    • Question 9
      • Crossing-over occurs during which of the following phases?
      • A. metaphase I
      • B. metaphase II
      • C. prophase I
      • D. prophase II
      • E. anaphase I
    • Question 10
      • The fusion of sperm and egg is called synapsis.
      • A. true
      • B. false
    • Question 11
      • During which stage do homologous chromosomes move away from each other?
      • A. prophase
      • B. anaphase I
      • C. anaphase II
      • D. metaphase I
      • E. metaphase II
    • Question 12
      • The second meiotic division is essentially a mitotic division except for the fact that the cells produced are:
      • A. haploid
      • B. diploid
      • C. polyploidy
      • D. autosomal
      • E. somatic
    • Question 13
      • Gametes and spores:
      • A. are both produced by animals
      • B. are autosomal
      • C. are haploid
      • D. are diploid
      • E. join in fertilization
    • Question 14
      • In the cell cycle the "S" stands for:
      • A. somatic
      • B. sexual
      • C. synthesis
      • D. sister
      • E. synapsis
    • Question 15
      • A biologist is studying the relaxed form of a chromosome. He or she would be studying which of the following?
      • A. chromatin
      • B. chromatids
      • C. centromeres
      • D. centrosomes
      • E. cytokinesis
    • Question 16
      • If the total number of chromosomes is six, then after mitosis there will be:
      • A. two chromosomes in each daughter cell, one from each parent
      • B. three chromosomes in each cell
      • C. 12 chromosomes in each cell
      • D. six chromosomes in each daughter cell
      • E. three chromosomes in one daughter cell and six chromosomes in the other cell
    • Question 17
      • Which is not a correct association?
      • A. cytokinesis-division of the cytoplasm
      • B. centromere-point at which sister chromatids remain attached
      • C. somatic-cells of the body not involved in gamete production and undergo mitosis
      • D. sister chromatids-two identical chromosome arms still attached at the centromere
      • E. mitosis-when a cell duplicates and then divides twice to half the chromosome number
    • Question 18
      • Which of the following is not the correct association?
      • A. somatic cells-diploid
      • B. somatic cells-haploid
      • C. one parent cell-two daughter cells
      • D. gamete cells-haploid
      • E. body cells-diploid
    • Question 19
      • If an organism has 50 chromosomes in its somatic cells, which of the following would be haploid?
      • A. 50 chromosomes
      • B. 50 pairs of chromosomes
      • C. 25 chromosomes
      • D. 25 pairs of chromosomes
      • E. 100 chromosomes
    • Question 20
      • During _______________, the nuclear envelope disappears, and the chromosomes become distinct.
      • A. interphase
      • B. prophase
      • C. metaphase
      • D. anaphase
      • E. telophase