Ecdysone is produced by |
|||||||
a) |
Prothoracic gland |
b) |
Corpora cardiaca |
c) |
Corpora allata |
d) |
Abdominal gland |
Ecdysone is produced by |
|||||||
a) |
Prothoracic gland |
b) |
Corpora cardiaca |
c) |
Corpora allata |
d) |
Abdominal gland |
(a)
The moulting hormone of the prothoracic glands, named ecdyson, was isolated in a crystalline form in 1954 by Butenandt and Karlson. Ecdyson is a steroid hormone, known to trigger moulting it acts on the tissue to promote all the changes characterizing a moult.
The feeding organ in phylum-Mollusca is |
|
a) |
Ctenedia |
b) |
Undulating membrane |
c) |
Sucker |
d) |
Radula |
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