A characteristic of life is
A. chemical bonds.
B. the use of oxygen.
C. the production of CO2.
D. cellular organization.
D. cellular organization.
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The ________ is a dense network of microfilaments just beneath the plasma membrane.
Fill in the blank(s) with the appropriate word(s).
Spindles are___
a. permanent cell structures. b. present throughout every step of mitosis. c. present during interphase. d. mainly composed of microtubules. e. all identical.
In a polygynous mating system:
a. multiple females tend to mate with the same male. b. neither males nor females provide parental care beyond gestation and lactation. c. many females are unable to secure a mate. d. variance in female reproductive success is greater than variance in male reproductive success. e. parental care is predominantly by the father.
In the electromagnetic spectrum, ____.
A. infrared energy has the shortest wavelength B. infrared radiation has more energy than red radiation C. visible light has more energy than ultraviolet radiation D. near-infrared radiation provides the energy for photosynthesis E. visible light provides the energy for photosynthesis