Insect Diversity

Question 1

humans have continuous development, insects have ___ development

Answer 1

discrete

Question 2

nymph

Answer 2

overall term for an insect in juvenile phase with simple metamorphosis

Question 3

instar

Answer 3

moulting stages in juvenile phase

Question 4

what is the process of moulting?

Answer 4

the growth and shedding of a cuticle where the new exoskeleton is malleable and a different color before hardening

Question 5

how is moulting involved in growth?

Answer 5

the new cuticle is larger and softened before the insect grows into it

Question 6

ametabulous

Answer 6

gradual change in size, slight or no metamorphosis in wingless insects: Archaegonatha and Zygentoma, regarded as less advance

Question 7

metamorphosis

Answer 7

change in body form/structure

Question 8

hemimetabolous

Answer 8

incomplete metamorphosis

Question 9

what characteristics are common in hemimetabolous?

Answer 9

nymphs have a similar habitat and lifestyle as adults, don’t form pupae, differing characteristics with each molt,

Question 10

holometabolous

Answer 10

complete metamorphosis

Question 11

what are some examples of aquatic nymphs?

Answer 11

stoneflies and dragonflies

Question 12

pupa

Answer 12

the stage between the last juvenile and final adult stage

Question 13

what is necessary for development in the pupa stage?

Answer 13

a safe habitat because it is vulnerable

Question 14

prothoracic gland

Answer 14

in early larva, the gland produces ecdysteroids that trigger the production of the new cuticle

Question 15

ecdysteroids

Answer 15

steroids trigger the production of the new cuticel

Question 16

juvenile hormone

Answer 16

the level of juvenile hormones reflects the stage of the insect. less JH = later stage more JH = earlier stage

Question 17

volintism

Answer 17

number of generations per year

Question 18

univoltine

Answer 18

once per year

Question 19

bivoltine

Answer 19

twice per year

Question 20

multivoltine

Answer 20

multiple per year

Question 21

semivoltine

Answer 21

one gen in multiple years

Question 22

diapause

Answer 22

arrested (incomplete, physical) development in generations

Question 23

dormant

Answer 23

reduced metabolic activity that can occur in any development in any stage, but typically egg or pupae

Question 24

aestivation

Answer 24

dormant in summer

Question 25

hibernation

Answer 25

dormant in hibernation

Question 26

what are some environmental implications of hemimetabolous?

Answer 26

shared resources among insects so they have to compete