MCQ Collection
BS Zoology Semester Exam MCQs
Practice BS Zoology Semester Exam questions with answers and explanations.
Choose an option to check your answer.
A.
yolk accumulation and chorion formation prepare the egg for development
B.
old cuticle separates from epidermis
C.
oxygen enters through mandibles
D.
thoracic muscles produce sperm
Show Answer
Correct Answer: A. yolk accumulation and chorion formation prepare the egg for development
Explanation:
Egg maturation involves growth of the oocyte, yolk deposition, and formation of protective egg coverings. These processes support early embryonic development.
Choose an option to check your answer.
A.
oxygen enters through mandibles
B.
old cuticle separates from epidermis
C.
thoracic muscles produce sperm
D.
yolk accumulation and chorion formation prepare the egg for development
Show Answer
Correct Answer: D. yolk accumulation and chorion formation prepare the egg for development
Explanation:
Egg maturation involves growth of the oocyte, yolk deposition, and formation of protective egg coverings. These processes support early embryonic development.
Choose an option to check your answer.
A.
the gut pumps hemolymph
B.
adult wings detach after mating
C.
spiracles close permanently
D.
lateral epidermal sheets move to close the dorsal side of the embryo
Show Answer
Correct Answer: D. lateral epidermal sheets move to close the dorsal side of the embryo
Explanation:
Dorsal closure is an embryonic morphogenetic event where tissue sheets meet and seal the dorsal surface. It is a key step in insect development.
Choose an option to check your answer.
A.
ovaries and testes produce gametes for sexual reproduction
B.
spiracles produce eggs
C.
wings store sperm
D.
Malpighian tubules form embryos
Show Answer
Correct Answer: A. ovaries and testes produce gametes for sexual reproduction
Explanation:
The main reproductive organs are ovaries in females and testes in males. They produce gametes that unite during fertilization.
Choose an option to check your answer.
A.
the gut pumps hemolymph
B.
spiracles close permanently
C.
lateral epidermal sheets move to close the dorsal side of the embryo
D.
adult wings detach after mating
Show Answer
Correct Answer: C. lateral epidermal sheets move to close the dorsal side of the embryo
Explanation:
Dorsal closure is an embryonic morphogenetic event where tissue sheets meet and seal the dorsal surface. It is a key step in insect development.
Choose an option to check your answer.
A.
Malpighian tubules form embryos
B.
spiracles produce eggs
C.
wings store sperm
D.
ovaries and testes produce gametes for sexual reproduction
Show Answer
Correct Answer: D. ovaries and testes produce gametes for sexual reproduction
Explanation:
The main reproductive organs are ovaries in females and testes in males. They produce gametes that unite during fertilization.
Choose an option to check your answer.
A.
the gut pumps hemolymph
B.
adult wings detach after mating
C.
lateral epidermal sheets move to close the dorsal side of the embryo
D.
spiracles close permanently
Show Answer
Correct Answer: C. lateral epidermal sheets move to close the dorsal side of the embryo
Explanation:
Dorsal closure is an embryonic morphogenetic event where tissue sheets meet and seal the dorsal surface. It is a key step in insect development.
Choose an option to check your answer.
A.
ovaries and testes produce gametes for sexual reproduction
B.
Malpighian tubules form embryos
C.
spiracles produce eggs
D.
wings store sperm
Show Answer
Correct Answer: A. ovaries and testes produce gametes for sexual reproduction
Explanation:
The main reproductive organs are ovaries in females and testes in males. They produce gametes that unite during fertilization.
Choose an option to check your answer.
A.
lateral epidermal sheets move to close the dorsal side of the embryo
B.
spiracles close permanently
C.
the gut pumps hemolymph
D.
adult wings detach after mating
Show Answer
Correct Answer: A. lateral epidermal sheets move to close the dorsal side of the embryo
Explanation:
Dorsal closure is an embryonic morphogenetic event where tissue sheets meet and seal the dorsal surface. It is a key step in insect development.
Choose an option to check your answer.
A.
pumps hemolymph into wings
B.
secretes molting hormone
C.
stores sperm in many female insects
D.
detects light intensity
Show Answer
Correct Answer: C. stores sperm in many female insects
Explanation:
A spermatheca allows females of many insects to store sperm after mating. Stored sperm may fertilize eggs later, improving reproductive flexibility.
Choose an option to check your answer.
A.
instant conversion of larvae into eggs
B.
permanent loss of reproduction
C.
continuous feeding without rest
D.
a hormonally regulated pause that helps survive unfavorable conditions
Show Answer
Correct Answer: D. a hormonally regulated pause that helps survive unfavorable conditions
Explanation:
Diapause is a developmental arrest synchronized with seasonal stress such as cold or drought. Hormonal control helps insects survive until conditions improve.
Choose an option to check your answer.
A.
pumps hemolymph into wings
B.
secretes molting hormone
C.
stores sperm in many female insects
D.
detects light intensity
Show Answer
Correct Answer: C. stores sperm in many female insects
Explanation:
A spermatheca allows females of many insects to store sperm after mating. Stored sperm may fertilize eggs later, improving reproductive flexibility.
