Multiple Choice QuestionsWhich of the following cell type is capable of giving rise to other cell types in sponges ?
Thesocytes
Pinacocytes
Cnidocytes
Archaeocytes
Malpighian tubµles are
excretory organs of insects
excretory organs of frog
respiratory organs of insects
endocrine glands of insects
A.
excretory organs of insects
Excretory organs of insects are called as malpighian tubules. They absorb excretory substances from haemolymph and fat bodies and pass into the proctodaeum. Uric acid is the excretory product of insects.
Trachea is the respiratory organ of insects. It opens outside by ten pairs of spiracles, present in thoracic and abdominal parts.
Endocrine glands of insects consist of corpora allata, corpora cardiaca and prothoracic gland. They regulate metamorphosis in insects through different hormonal secretion.
Excretory organ of frog is kidney.
Which of the following is not a character of Chordata?
Dorsal tubular nerve cord
Pharyngeal gill slits
Presence of notochord
Presence of spinal cord
The group of anamniota includes:
reptiles and birds
birds and mammals
fishes and amphibians
reptiles, and mammals
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