Alberta Biting Fly (Mosquito) Control Certificate Exam 200 Questions with Correct Answers and Explanations

Alberta Biting Fly (Mosquito) Control
Certificate Exam 200 Questions with Correct
Answers and Explanations


Section 1: Mosquito Biology and Life Cycle (Questions 1-35)
1. What is the primary habitat for mosquito larvae?

 A) Dry soil
 B) Standing water
 C) Tree bark
 D) Leaf litter

Correct Answer: B) Standing water

Explanation: Mosquito larvae are entirely aquatic and require standing water for their
development. They cannot survive in dry environments because their breathing siphons
and feeding structures are adapted for water. The presence of standing water is the single
most critical factor determining mosquito breeding success.




2. What are the four stages of the mosquito life cycle in correct order?

 A) Egg, pupa, larva, adult
 B) Egg, larva, pupa, adult
 C) Larva, egg, pupa, adult
 D) Pupa, egg, larva, adult

Correct Answer: B) Egg, larva, pupa, adult

Explanation: Mosquitoes undergo complete metamorphosis with four distinct stages. The
eggs hatch into larvae (also called "wrigglers"), which develop into pupae ("tumblers"), and
finally emerge as adult mosquitoes. This sequence is essential knowledge for timing
control measures effectively.

, 3. What stage of the mosquito life cycle is the pupa?

 A) Egg
 B) Larva
 C) Adult
 D) Transitional stage

Correct Answer: D) Transitional stage

Explanation: The pupa is a non-feeding, transitional stage between larva and adult.
During this stage, metamorphosis occurs inside the pupal case. Pupae do not feed and are
relatively inactive compared to larvae, though they can tumble when disturbed—hence
the name "tumbler."




4. The mosquito larva is also commonly known as a:

 A) Tumbler
 B) Wriggler
 C) Nymph
 D) Instar

Correct Answer: B) Wriggler

Explanation: Mosquito larvae are commonly called "wrigglers" because of their
characteristic wriggling swimming motion. This stage lives in water, feeds on
microorganisms and organic matter, and molts four times as it grows through four instar
stages before pupating.




5. The mosquito pupa is also commonly known as a:

 A) Wriggler
 B) Instar
 C) Tumbler

, D) Nymph

Correct Answer: C) Tumbler

Explanation: Mosquito pupae are called "tumblers" because they tumble through the water
when disturbed. Unlike larvae, pupae do not feed and are shaped like a comma. They
breathe through respiratory trumpets at the water's surface.




6. How long is the typical mosquito life cycle in Alberta during summer?

 A) 1–2 days
 B) 7–14 days
 C) 30–45 days
 D) 60–90 days

Correct Answer: B) 7–14 days

Explanation: Under optimal summer conditions in Alberta, mosquitoes can complete their
life cycle from egg to adult in 1–2 weeks. Warmer temperatures accelerate development,
while cooler conditions slow it down. This rapid development explains why mosquito
populations can explode quickly after rainfall or snowmelt.




7. Which factor most affects mosquito population growth?

 A) Temperature
 B) Soil type
 C) Wind direction
 D) Altitude

Correct Answer: A) Temperature

Explanation: Temperature is the primary environmental factor affecting mosquito
population growth because it directly influences development rates, activity levels, and
survival. Warmer temperatures accelerate the life cycle, leading to more generations per
season. In Alberta, the warm summer months drive peak mosquito activity.

, 8. Which type of mosquito lays eggs singly on moist soil rather than directly in
water?

 A) Culex species
 B) Anopheles species
 C) Aedes species
 D) Culiseta species

Correct Answer: C) Aedes species

Explanation: Certain Aedes species lay drought-resistant eggs on moist soil or at the edges
of water bodies. These eggs can survive desiccation and cold winter conditions, hatching
when water returns through rainfall or snowmelt. This adaptation allows Aedes
mosquitoes to thrive in temporary pools and floodwater habitats common in Alberta.




9. Which mosquito genus lays eggs in rafts on the water surface?

 A) Aedes
 B) Anopheles
 C) Culex
 D) Psorophora

Correct Answer: C) Culex

Explanation: Culex mosquitoes lay their eggs in bunches or "rafts" that float on the water
surface. These rafts contain 100-300 eggs glued together and hatch within 1-3 days. This
reproductive strategy is characteristic of Culex species, including Culex tarsalis, the
primary West Nile virus vector in Alberta.




10. Which mosquito species overwinters as adults in Alberta?

 A) Aedes vexans
 B) Culex tarsalis