In soft-bottom communities deposit feeders dominate
a. where sediments are generally muddy.
b. as epifauna on worm tubes.
c. as meiofauna.
d. where sediments are generally sandy.
e. where oxygen levels are low.
A
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How do sphagnum mosses contribute to the carbon cycle? Select all correct choices
A. As decomposers, they release large amounts of CO2 into the atmosphere. B. They produce phenols, which release the carbon stored in peat bogs. C. As heterotrophs, they remove large amounts of CO2 from the atmosphere. D. They produce protons, which limit decomposition and CO2 production in peat bogs.
Which of the following is associated with striated, multinucleated muscle tissue?
A. cardiac muscle cell B. calmodulin C. skeletal muscle cell D. smooth muscle cell
What is the function of normal biota of the respiratory tract?
A. Provides antibodies B. Microbial antagonism C. Competes with pathogens for resources and space D. Both [competes with pathogens for resources and space] and [microbial antagonism] are correct. E. All of these three functions are correct.
DNA contains an organism's genetic material, organized into sequences called:
a. genes. b. chromosomes. c. gametes. d. nuclei. e. sperm and egg cells.