Entom Lecture 3

Question 1

Biological DT of Mosquitoes:

Answer 1

• Propagative
• Cyclopropagative

Question 2

Mechanical DT of Mosquitoes

Answer 2

• Ecdysis
• Ecdysone

Question 3

Types of Metamorphosis

Answer 3

• Ametabola
• Hemimetabola
• Holometabola

Question 4

Types of Myasis

Answer 4

• accidental
• obligatory
• facultative
• cutaneous
• urogenital
• ophthalmic
• nasopharyngeal
• intestinal
• creeping
• furuncular
• traumatic

Question 5

Taxonomic classifications of important pest and vector species of Mosquitoes:

Answer 5

S
H
A
A
M
P

Genera:
- Culex
- Aedes
- Anopheles
- Psorophora
- Mansonia
- Haemagogus
- Sabethes

Question 6

Mosquitos have _____ symmetrical body, subdivided into _______.

Answer 6

bilaterally, segments

Question 7

Mosquitos’ bodies are covered with exoskeleton which is made up of a tough and rigid substance known as ______

Answer 7

Chitin

Question 8

Jointed appendages are present on some body segments of mosquitos?
T or F

Answer 8

T

Question 9

Mosquitos’ Biology include: Body cavity between the ______ and the body wall.

Answer 9

alimentary canal

Question 10

Mosquitos have open circulatory system that works by diffusion unlike the arteries and veins in higher animals like humans.
T or F

Answer 10

T

Question 11

Do mosquitos have ventral ladder type digestive system?
T or F

Answer 11

F - ventral ladder type nervous system.

Question 12

Mosquitos have ventral ladder type nervous system. These are called _____ and are situated at different places in the body of the arthropod with a ladder type linkage.

Answer 12

ganglia

Question 13

In mosquitos, Messages passes from one ganglia to the other and finally to the big ganglia at the (abdomen or head) through the nerves.

Answer 13

head

Question 14

In mosquitos, Growth by molting, which is controlled by (hormones or ganglia)

Answer 14

hormones

Question 15

Genera of mosquitos that are responsible for transmitting malaria

Answer 15

Anopheles species

Question 16

What are the vectors of filariasis:

Answer 16

W
A
B
B

• Wuchereria bancrofti
• Brugia malayi
• Brugia timori
• arboviruses

Question 17

Genera that transmit Wuchereria bancrofti and arboviruses

Answer 17

Culex species

Question 18

Species that are vectors of yellow fever, dengue, West Nile virus and other arboviruses, Wuchereria bancrofti and Brugia malayi

Answer 18

Aedes species

Question 19

species that transmit Brugia malayi,_ Wuchereria bancrofti and a few arboviruses

Answer 19

Mansonia species

Question 20

2 vectors of yellow fever and a few other arboviruses in Central
and South America

Answer 20

Haemagogus and Sabethes mosquitoes

Question 21

Genus that transmit arboviruses and as troublesome biters in North and South America.

Answer 21

genus Psorophora

Question 22

Mosquitos are slender and relatively small insects measuring about ___ mm in length

Answer 22

3-6 mm

Question 23

2 mm while others may be as long as ___

Answer 23

19 mm

Question 24

Mosquitos’ bodies
are distinctly divided into a head, thorax and abdomen. T or F

Answer 24

T

Question 25

Mosquitoes have (one or two) pair of functional wings (the fore-wings) and (hindwings) a pair of small knob-like halteres.

Answer 25

one pair

Question 26

Mosquitos have the possession of a conspicuous forward-projecting _____

Answer 26

proboscis

Question 27

Mosquitos have the presence of numerous appressed scales on the thorax, legs, abdomen and (wing veins) ? T or F

Answer 27

T

Question 28

Mosquitos have a fringe of scales along the (anterior or posterior) margin of the wings.

Answer 28

posterior

Question 29

feathery antennae are males or femles (mosquitoes)

Answer 29

Male

Question 30

short and rather inconspicuous antennal hairs are females

Answer 30

females

Question 31

Mosquitos have Saliva that contains _____ that produce haematomas in the skin and facilitate the uptake of blood.

Answer 31

antihaemostatic enzymes

Question 32

Mosquitos have Saliva that also contains ____ to prevent blood from clotting and obstructing the mouthparts as it is sucked up, and _____substances that help reduce the pain inflicted by the mosquito's bite, so reducing the host's defensive reactions.

Answer 32

anticoagulants, anesthetic substances

Question 33

Although male mosquitoes have a proboscis, the maxillae and mandibles are usually reduced in size or the mandibles are absent, and consequently males cannot bite T or F

Answer 33

T

Question 34

Autogenous Development

Answer 34

Gonodostrophic cycle

Question 35

Oviposition and biology of eggs of Culex

Answer 35

30 - 300 eggs in one oviposition in eggraft