How do intertidal brown algae compete with barnacles and mussels for space?
What will be an ideal response?
These macrophytes use the sweeping motion of the blades to prevent settling cyprid larvae of barnacles (called cyprids, see Ch. 9) and larval mussels (called pediveligers) from getting a hold onto the rocks nearby.
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Darwin's inference that individuals within a population compete for limited resources was based on
which observation(s)?
a. Most organisms produce more than one or two offspring. b. Populations do not increase in size indefinitely. c. Food and other resources are limited for most populations. d. Most organisms produce more than one or two offspring and populations do not increase in size indefinitely. e. Most organisms produce more than one or two offspring, populations do not increase in size indefinitely, and food and other resources are limited for most populations.
Birds that pursue their prey underwater are:
a. gulls. b. pelicans. c. penguins. d. stilts. e. plovers.
Which of the following statements about plants grown in hydroponic culture is true?
A. They cannot be used for commercial purposes. B. They are suspended with their roots in a nutrient solution. C. They are unable to photosynthesize. D. They no longer need to transport water through their xylem. E. They rarely get enough micronutrients.
All of the following are characteristics of spread plates except ________.
A. spread plates readily grow anaerobic bacteria B. spread plates are typically inoculated with a bent glass rod C. they have colonies that grow on the surface of the agar D. specimens are typically diluted prior to inoculation of a spread plate