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WorksheetsBIOLOGY F6: C10 Role of hormones in ecdysis and metamorphosis
Total questions: 10
Worksheet time: 8mins
After hatching from an egg, the nymph goes through a series of moults.
Metamorphosis is necessary for an insect due to
Increases the chances of survival of the species
Larvae acts as a dispersal phase
Increases the competition within the species
Provide a time period for a species to adapt to new conditions that will be encountered in adult stage
What are the types of hormone involved in ecdysis and metamorphosis of an insect?
JH (Juvenile Hormone)
ACTH (Adrenocortitropic Hormone)
PTTH (Prothoracicotrophic Hormone)
Ecdysone
Which of the following statements are true about the function of PTTH?
Stimulate corpus allata to secrete Juvenile hormones to activate the genes that control retention (maintenance) of larval / nymphal characteristics during development.
Stimulate secretion of ecdysone from the prothoracic gland to activate the genes that control the synthesis of enzymes involved in the growth and changes in epidermal cells during ecdysis.
Activate the genes to control retention of larval / nymphal characteristics
Activate the genes that control the synthesis of enzymes involved in the growth and changes in epidermal cells
Which of the gland below is atrophy and disappear in an adult winged insect?
Pars intercerebralis
Corpus allatum
Corpus cardiacum
Prothoracic gland
Which of the condition where ecdysis is taken place?
High ecdysone
High JH
Low ecdysone
High JH
High ecdysone
Low JH
Low ecdysone
Low JH
