As you examine a soil sample under your microscope, you note the presence of tiny, wormlike organisms. You immediately suspect that these creatures are nematodes. The presence of which characteristics would support your hypothesis? Check all that apply.
_____ longitudinal but not circular muscles.
_____ separate male and female individuals.
_____ shedding of the integument.
_____ a tough, collagen-based cuticle.
_____ abundant flame cells,
__X__ longitudinal but not circular muscles.
__X__ separate male and female individuals.
__X__ shedding of the integument.
__X__ a tough, collagen-based cuticle.
_____ abundant flame cells,
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Many health food stores carry enzyme preparations intended for oral ingestion (by mouth) to supplement existing enzymes in various organs like the liver, heart, and muscle. Use your knowledge of the digestion process to explain why these preparations are unlikely to be effective as advertised.
What will be an ideal response?
The complex of periplasmic flagella that mediates the movement of spirochetes is referred to as the ________.
A. axillary filament B. periplasmic flagella C. axial filament D. peritrichal axon E. periplasmic flagella or axial filament
The binding of a regulatory transcription factor to a(n) _________ can stimulate transcription 10- to 1000- fold, which is called _______________ regulation
Fill in the blank(s) with the appropriate word(s).
Which one of the following statements about energy is correct?
A. Chemical energy is a form of kinetic energy. B. A leaf falling from a tree represents potential energy. C. We convert about 99% of our food energy to useful work. D. Energy cannot be created or destroyed.