Question : Which of the following cells line the spongocoel and canals in members of the phylum Porifera?
Option 1: Somatic cells
Option 2: Collar cells
Option 3: White cells
Option 4: Sex cells
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Correct Answer: Collar cells
Solution : The correct answer is Collar cells.
Choanocytes, also called collar cells, are special cells that cover the inside of the central cavity (spongocoel) and canals in sponges. These cells have tiny, hair-like structures called flagella. The flagella move in a coordinated way to create a flow of water that goes in one direction, towards the opening at the top called the osculum. This flow helps the sponge filter and collect nutrients from the water, kind of like a natural water pump for the sponge.
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Question : Which of the following cells are found in the liver of mammals?
Option 1: Purkinje cells
Option 2: Microglial cells
Option 3: Kupffer cells
Option 4: Sensory cells
Question : Which one of the following substances is normally found in urine?
Option 1: Blood proteins
Option 2: Creatinine
Option 3: Red blood cells
Option 4: White blood cells
Question : Which of the following is a phylum of animals found in freshwater ponds, lakes, and swamps that provides setae, or parapodia for locomotion?
Option 1: Ctenophora
Option 2: Porifera
Option 3: Annelida
Option 4: Platyheiminthes
Question : Which of the following blood cells is compulsory for blood coagulation ?
Option 1: Platelets
Option 2: Red Blood Corpuscles
Option 3: White Blood Corpuscles
Option 4: Lymphocites
Question : Which cells, also called neurilemma cells, are the main glial cells in the Peripheral Nervous system(PNS) and play an essential role in the survival and functions of neurons?
Option 1: Bipolar cells
Option 2: Ganglion cells
Option 3: Schwann cells
Option 4: Photoreceptor cells
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