The metaphase stage of mitosis is characterized by the
A. arrangement of chromosomes along a line.
B. arrangement of chromosomes on a plane.
C. division of the centromeres.
D. duplication of genetic information.
B. arrangement of chromosomes on a plane.
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What special adaptation(s) has/have Thermoplasma evolved to survive in hot acidic environments?
A) Thermoplasma stabilize their cytoplasmic membrane by incorporation of tetraether lipoglycans in the cytoplasmic membrane. B) Thermoplasma have a reinforced cell wall containing basic amino linkers in the peptidoglycan. C) Thermoplasma excrete hydrogen ions and import hydroxyl ions. D) Thermoplasma are highly motile to avoid destruction.
The chromosomes are moving to opposite
sides of the cell during
a. anaphase. b. metaphase. c. interphase. d. prophase. e. telophase
Birds are the only modern amniotes with ____
a. wings b. feathers c. a four-chambered heart d. ectothermic metabolism e. more than one of these
Which of the following is not a function of an antibody?
A) activate complement cascade B) attract phagocytes C) stimulate helper T cells D) neutralize toxins