Which of the following is not true of protists as a group?
a. They are all single-celled.
b. They are eukaryotes.
c. They range in size from microscopic to large multicellular organisms.
d. They likely belong to multiple kingdoms.
A
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All of the following are non-protein electron carriers EXCEPT
A) FADH2. B) FMNH2. C) cytochromes. D) quinones.
Which of the following statements describe advantages that seeds have over spores?
_____ Seeds have tough walls that allow dispersal through the air. _____ Seeds are produced in greater numbers. _____ Seeds are able to store food. _____ Seeds employ various means of dispersal, allowing colonization of more diverse habitats. _____ Production of seeds does not require water as a medium for sperm transport.
The fluid mosaic model explains the function and components of which of the following?
a. Plasma membrane b. Endoplasmic reticulum c. Cytoskeleton d. Endomembrane system
Four of the five proteins listed below are molecules
that participate in muscle contraction. Select the exception. a. collagen b. troponin c. tropomyosin d. actin e. myosin