Insect development and metamorphosis

Question 1

Immature stages

Answer 1

• Nymph: Immature stage of insect with incomplete metamorphosis
• Naiad: An aquatic gill-breathing nymph
• Larva: Immature stage of an insect having complete metamorphosis.
• Pupa: Resting, non-feeding stage between the larva and the adult stage

Question 2

Mature stage

Answer 2

Imago: Last stage of development of an insect

Question 3

Instars

Answer 3

An insect between successive molds (1st instar = after hatching & before 1st molt)

Question 4

Ametabolous

Answer 4

No metamorphosis
* Stages: Egg->nymph->Adult
* Nymphs: No changes except for smaller size and sexually immature
* Species: Primitive wingless insects

Question 5

Hemimetabolous

Answer 5

Incomplete metamorphosis
* Stages: Egg->Nymph->adult
* Nymphs: Smaller size, lack fully developed wings, and sexually immature
* Species: Found in exopterygote insects (wings develop to the outside)

Question 6

Holometabolous

Answer 6

Complete metamorphosis
* Stages: Egg-> Larva-> pupa-> adult
* Larva: Very different from adults
* Species: Found in endopterygote insects (wings develop internally)