False. Their exoskeletons are made of silica.
I'm literally 99.9999% sure it's cytoplasm.
<span>They are considered accessory glands of the digestive system because they only send digestive juices and acids to the main digestive organs. Food does not actually enter any of the accessory organs.</span>
Answer: It is called Parasitism.
Explanation:
Parasitism is symbiotic relationship where an organisms lives in or on it's host thereby feeding and causing harm on it host. Examples of such relationship is parasites like roundworm, ticks, fleas that feed on humans and cause harm.