Arthropoda

Question 1

Properties

Answer 1

1) joined appendages
2) largest phylum
3) over 2/3 named species on earth are arthropods
4) body is divided into head , thorax and abdomen
5) body is covered with hard chitinous exoskeleton

Question 2

HABITAT

Answer 2

Can live in variety of habitats, be it in water or land
1) aquatic - prawns
2) terrestrial - cockroach

Question 3

LOO

Answer 3

Organ system

Question 4

BP

Answer 4

Tube within tube

Question 5

Symmetry

Answer 5

Bilateral

Question 6

Notochord

Answer 6

No

Question 7

GL

Answer 7

Triploblastic

Question 8

DS

Answer 8

Complete DS

Question 9

RS

Answer 9

RS starts with arthropods
1) Gills- prawns
2) Bookgills- Limulus (king crab)
3) Book lungs- Scorpions, Spider
4) Tracheal system- Insects

Question 10

CS

Answer 10

Open CS

Question 11

ES

Answer 11

1) malphighian tubule- insects
2) green gland - prawns

Question 12

NS

Answer 12

Double, ventral, solid nerve cord with ganglions

Question 13

Sensory structure

Answer 13

1) compound eye (ommatidium)
2) simple eyes (ocelli)
3) statocyst (balancing structure)
4) antennae

Question 14

Reproduction

Answer 14

Mostly unisexual

Question 15

Fertilization

Answer 15

Usually internal

Question 16

EXAMPLES

Answer 16

1) insects as vectors
2) economic important insects
3) gregarious pest
4) living fossil

Question 17

Development

Answer 17

Direct or indirect
Mostly oviparous (egg laying)

Question 18

Insects as vectors

Answer 18

1) Female (f) aedes mosquito- dengue
2) F anopheles mosquito - malaria
3) F culex mosquito - elephantiasis

Question 19

Economic important insects

Answer 19

1) Bombax (silkworm)- silk
2) Apis (honeybee)- honey, bee wax
3) Lacipher (lac insect)- lac (bangle industry)

Question 20

Gregarious pest

Answer 20

Lives in groups
Locusts

Question 21

Living fossil

Answer 21

No evolutionary change
King crab