All of the following are roles of microfilaments except
A) mitotic spindle formation.
B) muscle cell contraction.
C) amoeboid movement.
D) cytoplasmic streaming.
E) cell migration.
A) mitotic spindle formation.
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Which of the following is a difference between weak chemical bonds and covalent or ionic bonds?
A. Weak chemicals bonds are harder to break. B. Weak chemical bonds are shorter than covalent or ionic bonds. C. Weak chemical bonds are transient compared to covalent and ionic bonds. D. Weak chemical bonds are not particularly useful in biological systems. E. Weak chemical bonds require more energy to break than covalent and ionic bonds.
what depresses NK cells?
What will be an ideal response?
Because there would not have been any significant soil before significant establishment of life-forms on land, the earliest eukaryotic life-forms on land most likely were:
A) plant—fungi combinations. B) animals. C) fungi. D) plant—animal combinations.
If the volume of a cell increases, its surface area will
a. decrease. b. remain the same. c. increase proportionately. d. increase to a greater degree. e. increase to a lesser degree.