Morphology & Anatomy of Cockroach / Frog — NEET Biology MCQs with Solutions
Free NEET Biology Morphology & Anatomy of Cockroach / Frog MCQs with step-by-step solutions (117 questions). Part of Structural Organisation in Animals. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Morphology & Anatomy of Cockroach / Frog · easy · theory
The excretory organs of the cockroach are the:
A. Kidneys
B. Green glands
C. Nephridia
D. Malpighian tubules ✓ Correct
Solution: Malpighian tubules at the midgut–hindgut junction remove nitrogenous waste (uric acid) in cockroaches.
Q2 — Morphology & Anatomy of Cockroach / Frog · easy · theory
The body of a cockroach is divided into three regions:
A. Head, thorax and abdomen ✓ Correct
B. Thorax and abdomen only
C. Cephalothorax and abdomen
D. Head and trunk
Solution: The cockroach body has a head, thorax (bearing legs and wings) and a segmented abdomen.
Q3 — Morphology & Anatomy of Cockroach / Frog · medium · theory
The blood of a cockroach is colourless (haemolymph) and its circulatory system is:
A. Absent
B. Closed type
C. Double circulation
D. Open type ✓ Correct
Solution: Cockroaches have an open circulatory system; blood bathes tissues directly and lacks respiratory pigment (respiration is via tracheae).
Q4 — Morphology & Anatomy of Cockroach / Frog · medium · theory
Respiration in a cockroach occurs through a network of ______ opening to the exterior by ______:
A. Lungs; nostrils
B. Gills; opercula
C. Tracheae; spiracles ✓ Correct
D. Skin; pores
Solution: Air enters through 10 pairs of spiracles into tracheal tubes that deliver oxygen directly to tissues.
Q5 — Morphology & Anatomy of Cockroach / Frog · hard · theory
In the frog, the heart is ______ chambered and it exhibits ______ circulation:
A. Two; single
B. Three; single
C. Four; double
D. Three; double ✓ Correct
Solution: The frog has a three-chambered heart (two atria, one ventricle) with double circulation (some mixing of blood occurs).
Q6 — Morphology & Anatomy of Cockroach / Frog · hard · theory
The frog respires through its skin (cutaneous), buccal cavity and lungs. Cutaneous respiration is possible because the skin is:
A. Dry and keratinised
B. Impermeable
C. Moist and richly vascularised ✓ Correct
D. Covered with scales
Solution: The frog's moist, vascular skin allows gas exchange in water and on land; frogs are ectothermic amphibians.
Q7 — Morphology & Anatomy of Cockroach / Frog · easy · numerical
The abdomen of the cockroach (Periplaneta) is made up of how many segments?
A. 6 segments
B. 3 segments
C. 13 segments
D. 10 segments ✓ Correct
Solution: The cockroach abdomen consists of 10 segments; the thorax bears the three pairs of walking legs, not the abdomen.
Q8 — Morphology & Anatomy of Cockroach / Frog · easy · numerical
The three pairs of walking legs of the cockroach arise from its:
A. Anal cerci
B. Thorax ✓ Correct
C. Head
D. Abdomen
Solution: The cockroach thorax bears three pairs of legs (one pair per thoracic segment) and two pairs of wings; the abdomen bears no legs.
Q9 — Morphology & Anatomy of Cockroach / Frog · easy · numerical
The frog commonly studied in Indian laboratories, which is cold-blooded (poikilothermic), is:
A. Rana temporaria
B. Bufo melanostictus
C. Rana tigrina ✓ Correct
D. Hyla arborea
Solution: The common Indian bull frog is Rana tigrina; like other amphibians it is a cold-blooded (poikilothermic) animal.
Q10 — Morphology & Anatomy of Cockroach / Frog · medium · numerical
Assertion (A): The cockroach can survive with an open circulatory system in which blood is not confined to vessels. Reason (R): Its haemolymph does not carry oxygen, because respiratory gases are transported directly by a network of tracheae. Choose the correct option.
A. Both A and R are true and R is the correct explanation of A ✓ Correct
B. A is true but R is false
C. A is false but R is true
D. Both A and R are true but R is not the correct explanation of A
Solution: Gas exchange in the cockroach occurs through tracheae that reach the tissues directly, so the colourless haemolymph need not carry oxygen and an open circulation suffices; R explains A.
Q11 — Morphology & Anatomy of Cockroach / Frog · medium · numerical
Match the cockroach structure with its function: (i) Malpighian tubules (ii) Hepatic caeca (iii) Tracheae — (p) secrete digestive enzymes (q) excretion of nitrogenous waste (r) transport of respiratory gases. The correct match is:
A. (i)-q, (ii)-r, (iii)-p
B. (i)-q, (ii)-p, (iii)-r ✓ Correct
C. (i)-r, (ii)-p, (iii)-q
D. (i)-p, (ii)-q, (iii)-r
Solution: Malpighian tubules remove nitrogenous waste, hepatic caeca at the junction of foregut and midgut secrete digestive enzymes, and tracheae carry respiratory gases.
Q12 — Morphology & Anatomy of Cockroach / Frog · medium · numerical
The heart of the cockroach is described as:
A. An elongated muscular tube of 13 chambers lying along the mid-dorsal line of the thorax and abdomen ✓ Correct
B. A single-chambered sac inside the head
C. A three-chambered heart with two atria and one ventricle
D. A four-chambered structure like that of a mammal
Solution: The cockroach heart is a mid-dorsal muscular tube divided into 13 funnel-shaped chambers that receive haemolymph through valved openings (ostia).
Q13 — Morphology & Anatomy of Cockroach / Frog · medium · numerical
Which statement about the frog (Rana tigrina) is INCORRECT?
A. It stores urine temporarily in a urinary bladder
B. It is a cold-blooded animal whose body temperature varies with the surroundings
C. Its heart is four-chambered with two atria and two ventricles ✓ Correct
D. Its kidneys are mesonephric and produce urine
Solution: The frog heart is three-chambered (two atria and one ventricle), not four-chambered; the other statements about it are correct.
Q14 — Morphology & Anatomy of Cockroach / Frog · medium · numerical
Which pairing of a cockroach respiratory feature with its description is correct?
A. Tracheae — mouthparts used for chewing food
B. Tracheae — excretory tubules opening into the hindgut
C. Spiracles — chambers of the heart that pump haemolymph
D. Spiracles — small openings on the lateral sides through which air enters the tracheal system ✓ Correct
Solution: Air enters the cockroach through paired lateral openings called spiracles and then passes into the branching tracheal tubes that deliver oxygen to the tissues.
Q15 — Morphology & Anatomy of Cockroach / Frog · medium
Testis in cockroach is present in:
A. 2-8th abdominal segments
B. 2-6th abdominal segments
C. 6-8th abdominal segments
D. 4-6th abdominal segments ✓ Correct
Solution: Each testis of cockroach lies in the 4th to 6th abdominal segments.
Q16 — Morphology & Anatomy of Cockroach / Frog · medium
Digestive juice in cockroach is secreted by:
A. Hepatic caeca ✓ Correct
B. Malpighian tubules
C. Salivary gland only
D. Phallomere
Solution: Hepatic (gastric) caeca at the foregut-midgut junction secrete digestive juices; Malpighian tubules are excretory.
Q17 — Morphology & Anatomy of Cockroach / Frog · medium
Ovaries in cockroach are present in:
A. 2-6th abdominal segments ✓ Correct
B. 6-8th abdominal segments
C. 4-6th abdominal segments
D. 2-8th abdominal segments
Solution: The two ovaries of cockroach lie laterally in the 2nd to 6th abdominal segments.
Q18 — Morphology & Anatomy of Cockroach / Frog · medium
Phallic gland, phallomere, anal cercus and caudal style are found in:
A. Female cockroach
B. Male cockroach ✓ Correct
C. Frog
D. Earthworm
Solution: Phallomere, phallic gland and anal (caudal) styles are male structures; anal cerci occur in both sexes, so all together belong to the male cockroach.
Q19 — Morphology & Anatomy of Cockroach / Frog · hard
Which statement regarding anal cerci and anal styles in cockroach is correct?
A. Anal cerci are absent but anal styles are present in male.
B. Anal cerci are absent and anal styles are present in female.
C. Anal styles are absent and anal cerci are present in female. ✓ Correct
D. Anal styles are absent and anal cerci are present in male.
Solution: Anal cerci occur in both sexes; anal styles occur only in males. So in the female, anal styles are absent while anal cerci are present.
Q20 — Morphology & Anatomy of Cockroach / Frog · medium
In cockroach, identify the parts of the foregut in correct sequence:
A. Mouth -> Crop -> Pharynx -> Oesophagus -> Gizzard
B. Mouth -> Crop -> Pharynx -> Oesophagus -> Gizzard
C. Mouth -> Pharynx -> Oesophagus -> Crop -> Gizzard ✓ Correct
D. Mouth -> Gizzard -> Crop -> Pharynx -> Oesophagus
Solution: The foregut sequence is mouth, pharynx, oesophagus, crop and then gizzard (proventriculus).
Q21 — Morphology & Anatomy of Cockroach / Frog · medium
The bundles of sperms are called:
A. spermatophores ✓ Correct
B. gonapophysis
C. phallomere
D. spermathecal
Solution: Sperms are stored and discharged during copulation as bundles called spermatophores.
Q22 — Morphology & Anatomy of Cockroach / Frog · medium
Phallomere in cockroaches:
A. is accessory reproductive gland
B. helps to store spermatophores
C. is chitinous external genitalia ✓ Correct
D. represents ejaculatory duct
Solution: The phallomere (gonapophyses) is the chitinous asymmetrical external genitalia of the male cockroach.
Q23 — Morphology & Anatomy of Cockroach / Frog · medium
Ovarioles are:
A. immature ovaries
B. capsule containing fertilized ova
C. bundles of ova
D. ovarian tubules ✓ Correct
Solution: Each ovary is a group of eight ovarian tubules called ovarioles containing a chain of developing ova.
Q24 — Morphology & Anatomy of Cockroach / Frog · medium
Which of the following structures encases the fertilized eggs of cockroaches?
A. Ootheca ✓ Correct
B. Cocoon
C. Ovariole
D. Spermatheca
Solution: Fertilised eggs are encased in a dark brown, capsule-like ootheca.
Q25 — Morphology & Anatomy of Cockroach / Frog · hard
Select the incorrect statement.
A. The nymphs of cockroach moult about 13 times to reach adult form.
B. The nymphs of cockroach resemble adults.
C. Female cockroaches produce one ootheca at a time. ✓ Correct
D. Only adult cockroaches have wings.
Solution: A female produces on an average 9-10 oothecae in her life, not just one; the other statements are correct.
Q26 — Morphology & Anatomy of Cockroach / Frog · hard
Select the incorrect statement regarding cockroach:
A. Fat bodies and nephrocytes help in excretion of nitrogenous waste.
B. Uricose glands are principal reproductive glands in female cockroach. ✓ Correct
C. Malpighian tubules remain lined by glandular and ciliated cells.
D. Exchange of gases occurs by diffusion at the tracheoles.
Solution: Uricose glands are accessory excretory (uric-acid storing) structures associated with the male, not principal reproductive glands of the female.
Q27 — Morphology & Anatomy of Cockroach / Frog · medium
The principal nitrogenous waste in cockroach is:
A. ammonia
B. uric acid ✓ Correct
C. vasa
D. guanine
Solution: Cockroach is uricotelic; its Malpighian tubules excrete uric acid as the principal nitrogenous waste.
Q28 — Morphology & Anatomy of Cockroach / Frog · hard
Consider the following statements: (a) Cockroaches remain alive for several hours even after its head is cut off. (b) Nervous system of cockroach is dorsally placed along the whole body. Select the correct option.
A. Both a and b are true
B. a is true, b is false ✓ Correct
C. Both a and b are false
D. a is false, b is true
Solution: Cockroaches survive for hours after decapitation, but the nervous system (ventral nerve cord and ganglia) is ventrally, not dorsally, placed.
Q29 — Morphology & Anatomy of Cockroach / Frog · hard
Which of the following statements is incorrect?
A. A mushroom-shaped gland is present in the 6th-7th abdominal segment of male cockroach.
B. Female cockroach possesses sixteen ovarioles in the ovaries.
C. A pair of spermatheca is present in the 6th segment of female cockroach.
D. Cockroaches exhibit mosaic vision with less sensitivity and more resolution. ✓ Correct
Solution: Mosaic vision in cockroach gives MORE sensitivity but LESS resolution, so this statement is reversed and incorrect.
Q30 — Morphology & Anatomy of Cockroach / Frog · medium
Which of the following is a characteristic feature of cockroach regarding sexual dimorphism?
A. Dark brown body colour and anal cerci
B. Presence of anal cerci
C. Presence of sclerites
D. Presence of anal styles ✓ Correct
Solution: Anal styles are present only in males, so their presence distinguishes the sexes; anal cerci and sclerites occur in both.