Which of the following is in the correct order from smallest to largest structures?
a. myosin head, sarcomere, myofibril, muscle fiber
b. sarcomere, myosin head, muscle fiber, myofibril
c. myofibril, myosin head, sarcomere, muscle fiber
d. muscle fiber, sarcomere, myofibril, myosin head
A
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The matched pairs of chromosomes within a diploid organism, such as a human, are described as which of the following?
a. homologous chromosomes b. heterologous chromosomes c. gametic chromosomes d. somatic chromosomes
In most land ecosystems, ____ food chains predominate
a. decomposer b. detrital c. producer d. consumer e. grazing
Periderm is produced by:
a. xylem. b. cork cambium. c. pith. d. cortex. e. phloem.
These are nonphotosynthetic plankton, including aquatic protozoa and tiny animals.
A. phytoplankton B. thermophiles C. zooplankton D. diatoms