Arthropods

Question 1

Number of Arthropod species identified by scientists

Answer 1

1,000,000

Question 2

Number of arthropod species that are insects

Answer 2

600,000

Question 3

Largest species group within the Arthropods

Answer 3

Beetles

Question 4

Number of beetle species identified

Answer 4

350,000

Question 5

Number of crustaceans

Answer 5

38,000

Question 6

Number of Arachnids

Answer 6

57,000

Question 7

3 major “firsts” of Arthropods

Answer 7

1. Jointed appendages
2. Compound eye
3. Wings / can fly

Question 8

4 functions of mouth parts

Answer 8

1. Rip
2. Tear
3. Chew
4. Suck

Question 9

3 characteristics of arthropod bodies

Answer 9

1. Exoskeleton
2. Open circulatory system
3. Nerve cord with ganglion all along it

Question 10

What is molting?

Answer 10

The process by which Arthropods grow. They shed their exoskeleton, exposing a softer layer which will harden over time.

Question 11

Maxillae

Answer 11

Mouth part that holds and rotates food

Question 12

Mandible

Answer 12

Mouth part that has teeth and chews

Question 13

Compound eye

Answer 13

Can see thousands of images, lens, retina

Question 14

Antenna

Answer 14

Sensory organ (can sense shape and temperature)

Question 15

3 body segments of insects

Answer 15

1. Head
2. Thorax
3. Abdomen

Question 16

2 Body segments of crustaceans

Answer 16

1. Cephalothorax (fused head and thorax)

2. Abdomen

Question 17

Function of forewings

Answer 17

Flight

Question 18

Function of hindwings

Answer 18

Balance in flight

Question 19

Number and function of walking legs

Answer 19

2 pairs

Provide balance while walking

Question 20

Jumping legs

Answer 20

Rub together and create sound that attracts mate

Question 21

Ovipositor in male grasshopper

Answer 21

Use it to deposit it sperm into female

Question 22

Ovipositor in female

Answer 22

Accepts sperm and releases fertilized egg

Question 23

Spiracles

Answer 23

Used for breathing

Question 24

Tympanic membrane

Answer 24

Used for hearing, picked up sound

Question 25

Malpigian tubes

Answer 25

Removes waste

Question 26

Metamorphosis

Answer 26

Larva and adult look different

Question 27

6 characteristics of crustaceans

Answer 27

1. Keloped
2. Cephalothorax
3. Aquatic
4. 3 mouth parts
5. Largest arthropod
6. Hardest exoskeleton

Question 28

How are centipedes and millipedes different?

Answer 28

A centipede has one pair of legs on each body section and a millipede has two pairs of legs on each body section.

Question 29

Give 3 characteristics of Arachnids

Answer 29

1. 8 legs
2. All carnivores
3. All terrestrial

Question 30

What is the only type of arthropod to give live birth?

Answer 30

Scorpions

Question 31

What is the oldest known Arthropod?

Answer 31

Horseshoe crab