Arthropods II: Metamorphosis Hormones Flashcards Preview

Bio 111 > Arthropods II: Metamorphosis Hormones > Flashcards

Flashcards in Arthropods II: Metamorphosis Hormones Deck (64)
Loading flashcards...
1

What the 4 major groups of Arthropods?

1. Myriapods
2. Chelicerates
3. Crustaceans
4. Hexapods

2

Myriapods aka

"countless feet"

3

How many body regions do myriapods have?

2

4

What are the two regions of myriapods?

head and runk

5

chelicerates have ___ body regions

2

6

what are the two body regions of chelicerates

- chepalothorax: appendages
- abdomen: no appendages

7

How many pairs of appendages do chelicerates have?

6

8

what are the 6 pairs of appendages chelicerates have?

1: fangs
2: copulatory organs, pinchers
3, 4, 5, 6: walking legs

9

what are the three body regions of custaceans

-head
-thorax
-abdomen

10

what makes up the group of hexapods?

insects and other groups

11

what are the three body regions of a hexapod

1. head: antennae, mouthparts
2. thorax: 3 pairs of walking legs (possibly wings)
3. Abdomen: no appendages

12

are springtails insects?

no but they are considered hexapods

13

when did wings evolve?

around 320 mya

14

the wing of a ____ and the gill of a ___ ____ are homogolous

insect ; cray fish

15

how do most insects and myriapods breathe?

through holes (spiracles) open into tubular tracheae which branch to finer tubes
- carry O2 to body cells

16

What kind of circulatory system do arthropods have?

open system

17

what drives hemolymph into hemocoel

dorsal tubular heart with pores

18

what kind of valves do arthropods have?

one way valves

19

most species of arthropods are

dioceous

20

most species of arthropods...

lay eggs

21

Arthropods can reproduce on ___ and in ____

land ; water

22

How do Arthropods reproduce on land?

- internal fertilization
- some use spermatophores (= packets of sperm_

23

How do Arthropods reproduce in water?

internally (crabs) or externally (barnacles)

24

How do males prevent females from eating their sperm?

by giving it this extra layer that takes a long time to eat

25

Why do females compete for males?

because they get nutrients from the males

26

What does moulting enable?

changes in morphology aka metamorphosis

27

when do insects stop moulting?

when they are adults

28

what kind of Arthropod continues moulting as adults?

crustaceans

29

Indirect of holometabolous development

complete metamorphosis

30

what regulates moulting?

Wigglesworth's experiment