Exercise 1: Introduction to Insects and Arachnids

Question 1

CHARACTERISTICS AIDING TO SURVIVAL OF INSECTS

Answer 1

1. wings
2. adaptations
3. eat about anything
4. large reproductive capacity

Question 2

INSECTS

Answer 2

1. invertebrates
2. 3 body segmentations
3. 3 pairs of legs

Question 3

TAGMATA

Answer 3

1. regions dividing segments of insect body

Question 4

THREE BODY SEGMENTS OF INSECTS

Answer 4

1. head
2. thorax
3. abdomen

Question 5

INSECT HEAD

Answer 5

1. found in the anterior most part of body

Question 6

FUNCTION OF INSECT HEAD

Answer 6

1. food gathering and manipulation
2. sensory perception
3. neutral integration

Question 7

SENSORY ORGANS ON INSECT HEAD

Answer 7

1. pair of antenna
2. compound eye
3. 3 simple eyes

Question 8

OCELLUS

Answer 8

1. simple eye of insects

Question 9

IMPORTANT DIAGNOSTIC CHARACTERS OF INSECTS

Answer 9

1. antenna
2. mouthparts

Question 10

FUNCTION OF INSECT ANTENNA

Answer 10

1. sensory perception

Question 11

PARTS OF INSECT ANTENNA

Answer 11

1. scape: base attached with head capsule
2. pedicel: 2nd segment
3. flagellum: all remaining segments

Question 12

INSECT MOUTHPARTS

Answer 12

1. labrum: upper lip
2. mandible: teeth
3. maxillae: pincer
4. labium: lower lip
5. hypopharynx: toungue-like structure
6. epipharynx: sensory lobe in inner side of labrum

Question 13

THORAX

Answer 13

1. second region of insect body
2. bears locomotory organs
3. heavily sclerotized
4. contain one pair of legs per thoracic segment

Question 14

LOCOMOTORY ORGANS OF INSECTS

Answer 14

1. legs
2. wings

Question 15

PARTS OF INSECT THORAX

Answer 15

1. prothorax
2. mesothorax
3. metathorax

Question 16

DORSAL SCLERITES

Answer 16

1. nota

Question 17

LATERAL SCLERITES

Answer 17

1. pleura

Question 18

VENTRAL SCLERITES

Answer 18

1. sterna

Question 19

SEGMENTS OF INSECT LEGS

Answer 19

1. coxa
2. trochanter
3. femur
4. tibia
5. tarsus

Question 20

INSECT WINGS

Answer 20

1. found only on meso- and metathoracic segments

Question 21

PTEROTHORAX

Answer 21

1. wing-bearing segments

Question 22

ABDOMEN

Answer 22

1. third region of insect body
2. 8-11 segments for grasshoppers

Question 23

FUNCTION OF INSECT ABDOMEN

Answer 23

1. reproduction
2. digestion
3. circulation
4. respiration

Question 24

DORSAL ABDOMINAL SEGMENTS

Answer 24

1. terga

Question 25

VENTRAL ABDOMINAL SEGMENTS

Answer 25

1. sterna

Question 26

TYMPANUM

Answer 26

1. sound reception organ 2. located in membranous area of first abdominal tergite

Question 27

SPIRACLES

Answer 27

1. found between terga and sterna of segments 1 to 8

Question 28

LOCATION OF MALE INSECT REPRODUCTIVE STRUCTURES

Answer 28

1. 9th segment

Question 29

REPRODUCTIVE STRUCTURES OF MALE INSECTS

Answer 29

1. aedeagus 2. pair of claspers

Question 30

LOCATION OF FEMALE INSECT REPRODUCTIVE STRUCTURES

Answer 30

1. 8th and 9th segments

Question 31

REPRODUCTIVE STRUCTURES OF FEMALE INSECTS

Answer 31

1. external genitalia copulatory openings 2. ovipositor