In what way is cytokinesis in plant cells similar to binary fission in a bacterium?
A. Cell wall material is deposited between the
two nuclei to separate the daughter cells.
B. A ring of actin filaments constricts the
plasma membrane between the two nuclei to
separate the daughter cells.
C. A microtubulin-like structure constricts the
plasma membrane between the two nuclei to
separate the daughter cells.
D. A motor protein slides microtubules in a
contractile ring at the plasma membrane
between the two nuclei to separate the
daughter cells.
E. All of these choices are correct.
A
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Which of the following was NOT a major morphological criterion on which traditional classification of animals was based?
A. presence or absence of a true body cavity B. type of symmetry C. pattern of embryonic development D. presence or absence of certain types of tissue E. basic pattern of cell division
Which of the following nutrient types enters lacteals following digestion?
A. carbohydrates B. proteins C. nucleic acids D. vitamin C E. lipids
The movement of NH4
+ ions into a cell down an electrochemical gradient (where, when compared to the outside of the cell, the inside of the cell has less NH4 + ions) is best described as an example of
a. symport. b. passive diffusion. c. antiport. d. facilitated diffusion. e. active transport.
The human body temperature is 37o Celsius. If a person goes outside on a very cold day, the temperature will still be
close to 37 o Celsius. This is an example of ____.
a. pluripotency b. homology c. homeostasis d. differentiation e. regeneration