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Questions and Answers
What is the primary focus of entomology?
What is the primary focus of entomology?
Which of the following products is derived from the cactus mealybug?
Which of the following products is derived from the cactus mealybug?
What component of insects acts as an anticoagulant for tissue repair in humans?
What component of insects acts as an anticoagulant for tissue repair in humans?
Which feature is characteristic of insects but not other arthropods?
Which feature is characteristic of insects but not other arthropods?
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Which layer of the insect body wall is primarily responsible for secreting molting fluid?
Which layer of the insect body wall is primarily responsible for secreting molting fluid?
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In which body part of the insect are spiracles primarily found?
In which body part of the insect are spiracles primarily found?
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What is the outermost layer of an insect’s cuticle called?
What is the outermost layer of an insect’s cuticle called?
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Which term refers to the rearing of honeybees?
Which term refers to the rearing of honeybees?
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What is the primary function of siphoning mouthparts in adult Lepidopterans?
What is the primary function of siphoning mouthparts in adult Lepidopterans?
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Which type of antennae is characterized by segments that taper distally and resemble bristles?
Which type of antennae is characterized by segments that taper distally and resemble bristles?
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In chewing mouthparts, which components are primarily responsible for pushing food into the esophagus?
In chewing mouthparts, which components are primarily responsible for pushing food into the esophagus?
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Which type of antennae is described as having segments that are nearly uniformly cylindrical in size?
Which type of antennae is described as having segments that are nearly uniformly cylindrical in size?
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What feature distinguishes serrate antennae from other types?
What feature distinguishes serrate antennae from other types?
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Which part of the antenna is the basal segment called?
Which part of the antenna is the basal segment called?
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Which type of antennae is specifically described as being clubbed, with segments that gradually increase in diameter distally?
Which type of antennae is specifically described as being clubbed, with segments that gradually increase in diameter distally?
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What is the structure of rasping sucking mouthparts primarily designed for?
What is the structure of rasping sucking mouthparts primarily designed for?
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What is the primary function of the basement membrane in the body?
What is the primary function of the basement membrane in the body?
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Which mouthpart type in insects is characterized by the presence of both mandibles and a proboscis?
Which mouthpart type in insects is characterized by the presence of both mandibles and a proboscis?
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What is the function of maxillae in insect mouthparts?
What is the function of maxillae in insect mouthparts?
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How do hypognathous insects orient their mouthparts?
How do hypognathous insects orient their mouthparts?
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Which insect is an example of having chewing-sucking mouthparts?
Which insect is an example of having chewing-sucking mouthparts?
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What role do bio-indicators play in entomology?
What role do bio-indicators play in entomology?
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What adaptation do piercing-sucking mouthparts in insects feature?
What adaptation do piercing-sucking mouthparts in insects feature?
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Which term describes insects that have mouthparts directed backward?
Which term describes insects that have mouthparts directed backward?
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Study Notes
Crop Protection Reviewer
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Entomology is the branch of Zoology that studies insects and their interaction with the environment and other species.
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Insects are arthropods, a diverse group of segmented, bilaterally symmetrical animals with a hard, chitinous exoskeleton and jointed appendages. They are the most abundant group of organisms on Earth.
Products from Insects
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Apiculture is the rearing of honeybees ( Apis mellifera) for honey, beeswax, and other products like royal jelly.
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Sericulture involves the rearing of silkworms (Bombyx mori) to produce silk.
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Shellac is a sticky brown resinous substance produced from the lac insect's scale. It is used in various products, including polishes and sealing wax.
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Cochineal is a red dye extracted from the dried bodies of the cactus mealybug. It finds use in food coloring and cosmetics.
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Chitin is a component of insect exoskeletons. It is also used as an anticoagulant in humans for tissue repair.
Insects
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Exoskeleton: Arthropods (including insects) have an external skeleton that supports and protects their bodies.
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Three Pairs of Legs: This is a defining characteristic of insects that distinguishes them from other arthropods.
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Three Distinct Body Parts: Insects have a head, thorax, and abdomen.
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Head: Bears antennae, eyes, and mouthparts.
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Thorax: Bears wings (one or two pairs) and legs.
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Abdomen: Bears abdominal segments, spiracles, and the reproductive system.
General Insect Morphology
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Body wall: Composed of three parts
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Epidermal cells: Secrete molting fluid in the growth process.
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Cuticle: Non-cellular layer that lines the body surface and various internal structures.
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Epicuticle: Outermost, thin layer.
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Exocuticle: Middle layer for strength and resilience.
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Endocuticle: Innermost, thick layer.
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Basement membrane: Separates the body wall from internal organs.
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Importance of Entomology:
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Economically important as pests & natural enemies.
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Bio-indicators
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Medical & Veterinary importance
Insect Mouthparts
- Mouthparts vary depending on the insect's diet.
- Chewing-sucking (honeybees): use mandibles for manipulating food and a proboscis for sucking.
- Piercing-sucking (mosquitoes): mandibles and maxillae form a needle-like stylet for piercing and sucking.
- Sponging (houseflies): spongy pad at the end of the labellum for slurping.
- Siphoning (moths and butterflies): a tube-like proboscis formed from modified mouthparts for sucking.
- Chewing (most insects): mandibles for cutting and grinding food.
- Rasping-sucking: cone-shaped beak.
Antennae
- Antennae are sensory structures used for detecting various stimuli—e.g. smells, vibrations, wind.
- Three parts: scape, pedicel, flagellum.
- Types: Setaceous, filiform, moniliform, serrate, pectinate, clavate, capitate, lamellate, geniculate, plumose, aristate, and styliate.
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Description
Explore the fascinating world of entomology and its significance in agriculture and ecology. This quiz covers various aspects of insect biology, products derived from insects like honey and silk, and their roles in the ecosystem. Test your knowledge on these topics and their applications!
