AGRI 41 INSECTS 1

Question 1

There are over ____________ different kinds of insects.

Answer 1

1,000,000

Question 2

Insects have successfully survived and arise into different kinds because of several reasons. Give four reasons.

Answer 2

1. Most insects have wings. Helps with mobility, catching food, and escaping enemies.
2. Adaptations. Can change behavior or form to adapt and live in different environments.
3. Eat about anything. Have a wide array of diet: wood, plants, meat, decomposed vertebrates. etc. Some are selective.
4. Large Reproductive capacity. E.g. a queen termite can lay about 30,000 eggs per day and live up to 15 years.

Question 3

What do you call the three body regions of insects? Give the three body regions.

Answer 3

Tagmata (singular: tagma) ;
1. head
2. thorax
3. abdomen

Question 4

Where is the head of the insect situated? (anterior / posterior)

Answer 4

anterior

Question 5

The segments in the head are specialized for what? Give three examples.

Answer 5

1. food gathering/manipulation
2. sensory perception
3. neural integration

Question 6

Give the three sensory organs found in the head.

Answer 6

1. one pair of antenna
2. one compound eye
3. three simple eyes/ocellus (plural: ocelli)

Question 7

Give the three parts of the antennae in order from the head.

Answer 7

1. scape (base)
2. pedicel (2nd segment)
3. flagellum (individual segments: flagellomere)

Question 8

Give the six parts of the mouth and their function.

Answer 8

1. labrum (upper lip)
2. mandible (teeth)
3. maxillae (pincers, for food manipulation)
4. labium (lower lip)
5. hypopharynx (tongue-like)
6. epipharynx (sensory lobe in the inner side of the labrum)

Question 9

Two body parts found in the thorax.

Answer 9

1-2 pairs of wings ; 3 pairs of legs

Question 10

Give the three heavily sclerotized segments of the thorax

Answer 10

prothorax, mesothorax, metathorax

Question 11

Give the names for the dorsal, ventral, and lateral sclerites.

Answer 11

1. nota / notum
2. sterna / sternum
3. pleura / pleuron

Question 12

Give the pair of legs of each thoracic segment.

Answer 12

1. foreleg (prothoracic)
2. midleg (mesothoracic)
3. hindleg (metathoracic)

Question 13

What are the five segments found in each leg? Answer in order.

Answer 13

coxa, trochanter, femur, tibia, tarsus

Question 14

Which thoracic region can the wings be found?

Answer 14

only on the meso- and metathoracic regions (pterothorax)

Question 15

What functions are happening in the abdomen? Give four.

Answer 15

reproduction, digestion, circulation, respiration

Question 16

How many segments are there usually in the abdomen?

Answer 16

8-11 (for grasshoppers)

Question 17

What do you call the dorsal and ventral abdominal segment?

Answer 17

dorsal - terga/tergum
ventral - sterna/sternum

Question 18

What is the sound reception organ located in the membranous area of the first abdominal tergite?

Answer 18

tympanum

Question 19

Where can you find spiracles (holes) ?

Answer 19

between the terga and sterna of abdominal segments 1-8

Question 20

Where can you find reproductive structures for male and female?

Answer 20

9th abdominal segment (male) ; 8th - 9th (female)

Question 21

Arachnids: two body regions?

Answer 21

cephalothorax and abdomen

Question 22

What are the six pairs of appendages in the cephalothorax?

Answer 22

1. one pair of chelicerae (appendage/pincer in front of the mouth)
2. one pair of pedipalps (small legs)
3. four pairs of walking legs

Question 23

Arachnids: what are the three pair of appendages in the abdomen?

Answer 23

spinnerets

Question 24

Spider vs mites

Spider:
fused head and thorax = ?
abdomen =?

Mites:
head = ?
fused thorax and abdomen = ?

Answer 24

1. prosoma
2. opisthosoma
3. gnathosoma
4. idiosoma