Which of the following types of microscopes would be most appropriate for viewing the anatomy of a whole organism?
a. light microscope
b. dissecting microscope
c. scanning electron microscope
d. transmission electron microscope
b. dissecting microscope
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Pine seedlings grown in sterile potting soil grow much slower than seedlings grown in soil from the area where the seeds were collected. This is most likely because _____
A) sterilized soil kills the root hairs as they emerge from the seedling B) the normal symbiotic fungi are not present in the sterilized soil C) sterilization removes essential nutrients from the soil D) water and mineral uptake is slower when mycorrhizae are present
Which of the following are protein filaments that function in muscle contraction and are shaped like a golf club with two heads?
A) intermediate filaments B) myosin filaments C) myofilaments D) actin filaments
Cilia and flagella are most similar in
a. length. b. the kinds of cells that have them. c. the number that cells usually have. d. their internal composition and structure. e. their location along the cell’s periphery.
Which of the following are the least mobile protists?
a. heterokonts b. diatoms c. euglenoids d. apicomplexans