C.many parasites return with swarms
The human body contains more than 650 different muscles in three
categories, all under the control of the nervous system. Striated, or
skeletal, muscles, come under conscious, or voluntary, control. Smooth,
or visceral, muscles, such as those found in the digestive tract, are
connected to organs and perform their work outside of voluntary control.
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Answer:
suspension-feeding devices.
Explanation:
Chordates are animals that are characterized with the presence of pharyngeal slits, notchord, a dorsal hollow nerve cord and another tail feature.
The pharyngeal slits of chordates develops in the internal pharynx as a cleft, which further extends into the external pharynx. The pharyngeal slits in aquatic chordates functioned first as suspension-feeding device, which acts by straining foods from water to be ingested by such animals.
The pharyngeal slit is now commonly known as a filter feeding device
C) the length of a pencil
Answer:
answer is d) all of these choices are correct.
