75 practice questions on Structural Organisation in Animals , sorted Easy → Hard. Try each one first, then open its answer page for the worked explanation. Want the full theory first? Read the Structural Organisation in Animals notes .
Four Basic Animal Tissue Types Epithelial covering/lining squamous, cuboidal, columnar protection, secretion Connective cells in matrix areolar, adipose, cartilage, bone, blood support, transport Muscular contractile fibres skeletal, smooth, cardiac movement, contraction Neural neurons + neuroglia excitable, conducts impulses signal transmission All four tissue types combine to form organs; organs combine to form organ systems The four basic animal tissue types and their core functions: epithelial (covering/lining), connective (support and transport), muscular (movement), and neural (signal conduction).
Easy - 25 questions Q1.
In the cockroach, the blood-like fluid that fills the body cavity is called:
A HaemolymphB PlasmaC LymphD SerumShow answer & explanation →
Q3.
Peritrichous cilia and gap junctions aside, which cell junction chiefly performs cementing to keep neighbouring epithelial cells together?
A Tight junctionB Gap junctionC Adhering junctionD InterdigitationShow answer & explanation →
Q4.
The gland cells that secrete mucus in the epithelium are typically:
A Squamous cellsB Basal cellsC Cuboidal cellsD Goblet cellsShow answer & explanation →
Q5.
The earthworm moves with the help of tiny bristle-like structures called:
A SetaeB CiliaC FlagellaD ParapodiaShow answer & explanation →
Q6.
Which of the following is one of the four basic animal tissue types?
A Vascular tissueB Epithelial tissueC Meristematic tissueD Ground tissueShow answer & explanation →
Q7.
Which type of epithelium lines the alveoli of the lungs, allowing rapid gas diffusion?
A Cuboidal epitheliumB Columnar epitheliumC Squamous epitheliumD Compound epitheliumShow answer & explanation →
Q8.
Tendons, which connect muscle to bone, are made of which tissue type?
A Adipose tissue specialized for fat storage and cushioningB Dense regular connective tissueC Hyaline cartilage providing flexible structural supportD Loose areolar tissue filling spaces between organsShow answer & explanation →
Q9.
Which muscle type is found exclusively in the heart?
A Skeletal muscleB Smooth muscleC Cardiac muscleD Visceral muscleShow answer & explanation →
Q10.
Blood is classified as which type of tissue?
A Muscular tissue, capable of contractionB Epithelial tissue, forming protective liningsC A fluid connective tissueD Neural tissue, specialized for signal transmissionShow answer & explanation →
Q11.
The body of a cockroach (Periplaneta americana) is divided into which three main parts?
A Head, thorax, and abdomenB Head, neck, and trunkC Cephalothorax and abdomenD Head, body, and tailShow answer & explanation →
Q12.
Which structures help cockroaches breathe by opening to the exterior?
A SpiraclesB OstiaC NephridioporesD StomataShow answer & explanation →
Q13.
Bone, a connective tissue, is distinguished from cartilage mainly by being:
A Hard and mineralized, forming the rigid framework of the bodyB Soft and flexible, found mainly at the tips of the nose and earsC Found only in the embryonic skeleton, replaced later by cartilageD Composed of dead cells lacking any blood supplyShow answer & explanation →
Q14.
Skeletal muscle, attached to bones and responsible for voluntary movement, appears under the microscope as:
A Composed of cells without any nucleusB Striated and multinucleateC Non-striated and uninucleateD Branched with intercalated discsShow answer & explanation →
Q15.
The cockroach respires through openings on its body surface called:
A SpiraclesB StomataC OstiaD NephridioporesShow answer & explanation →
Q16.
A group of similar cells performing a common function is called a:
A tissueB whole organC body systemD single cellShow answer & explanation →
Q17.
The four basic types of animal tissue are epithelial, connective, muscular and:
A nervousB skeletalC fluidD fibrousShow answer & explanation →
Q18.
The tissue that covers and lines the surfaces of the body is:
A epithelial tissueB muscular tissueC nervous tissueD bone tissueShow answer & explanation →
Q20.
The tissue specialised for contraction and movement is:
A muscular tissueB epithelial tissueC nervous tissueD bone tissueShow answer & explanation →
Q21.
The tissue that carries impulses from one part of the body to another is:
A nervous tissueB muscular tissueC epithelial tissueD connective tissueShow answer & explanation →
Medium - 25 questions Q26.
In the earthworm, the clitellum is a prominent glandular band located in the region of segments:
A 7 to 9B 14 to 16C 20 to 22D 26 to 28Show answer & explanation →
Q27.
Which type of epithelium, made of tall cells often bearing microvilli, lines the stomach and intestine for secretion and absorption?
A Squamous epitheliumB Cuboidal epitheliumC Columnar epitheliumD Ciliated epitheliumShow answer & explanation →
Q28.
The blood cells of the cockroach that float in the haemolymph are the:
A ErythrocytesB HaemocytesC ThrombocytesD LeucocytesShow answer & explanation →
Q29.
In the earthworm, the muscular pharynx and gizzard help in feeding because the gizzard mainly:
A Absorbs nutrientsB Secretes enzymesC Stores bloodD Grinds soil particlesShow answer & explanation →
Q30.
Neurons that carry impulses towards the cell body do so through processes called:
A DendritesB AxonsC SynapsesD Nissl bodiesShow answer & explanation →
Q31.
Which feature distinguishes simple epithelium from compound (stratified) epithelium?
A Simple epithelium has multiple stacked layers while compound epithelium has mainly one, reflecting its role in mechanical protectionB Simple epithelium has a single cell layer suited to exchange/secretion; compound has multiple layers suited to protectionC Compound epithelium bears cilia on every surface while simple epithelium rarely bears cilia, even in respiratory tractD Simple epithelium occurs mainly in plant vascular tissue and is largely absent from all animal organ systemsShow answer & explanation →
Q32.
Which combination correctly distinguishes skeletal muscle from cardiac muscle, despite both being striated?
A Skeletal is voluntary and unbranched; cardiac is involuntary and branched with intercalated discsB Skeletal muscle contracts involuntarily while cardiac muscle remains under fully conscious controlC Both share roughly identical branching patterns and identical nervous control mechanisms overallD Skeletal muscle fibres are largely restricted to the myocardium tissue of the heart itselfShow answer & explanation →
Q33.
In the cockroach digestive system, what is the function of the gizzard?
A Secretes digestive enzymesB Stores food temporarily before digestionC Grinds food with the help of a thick cuticular liningD Absorbs digested nutrients into the haemolymphShow answer & explanation →
Q34.
Malpighian tubules in the cockroach are located at the junction of which two regions of the gut?
A Foregut and midgutB Midgut and hindgutC Mouth and oesophagusD Rectum and anusShow answer & explanation →
Q35.
Ciliated epithelium, found lining the trachea and bronchi, primarily functions to:
A Secrete digestive enzymes into the respiratory tractB Generate sound during speech by vibrating with airflowC Sweep mucus and trapped particles away from the lungsD Absorb oxygen directly into the underlying blood vesselsShow answer & explanation →
Q36.
Adipose tissue, a type of connective tissue, is specialized mainly for:
A Storage of fat and insulation of the bodyB Forming the rigid framework of long bonesC Conducting electrical impulses between organsD Generating rapid muscular contractionShow answer & explanation →
Q37.
Which feature distinguishes a tendon from a ligament, even though both are made of dense connective tissue?
A Tendons connect bone to bone, while ligaments connect muscle to boneB Tendons contain cartilage cells, while ligaments contain bone cellsC Tendons are found only in smooth muscle, while ligaments occur in skeletal muscleD Tendons connect muscle to bone, while ligaments connect bone to boneShow answer & explanation →
Q38.
The cockroach has compound eyes, each made up of numerous individual visual units called:
A NephridiaB StatocystsC Malpighian tubulesD OmmatidiaShow answer & explanation →
Q39.
Smooth muscle differs from skeletal muscle in that smooth muscle is:
A Found exclusively in the heart and nowhere else in the bodyB Voluntary and striated, found mainly attached to bonesC Multinucleate with visible striations under the light microscopeD Involuntary and non-striated, found in the walls of internal organsShow answer & explanation →
Q40.
Nervous tissue is composed of neurons along with supporting cells. The main function of nervous tissue in the body is to:
A Receive stimuli and transmit impulses rapidly throughout the bodyB Store energy reserves in the form of fat as frequently documentedC Provide the major structural framework of internal organs in most reference accountsD Generate the body's main mechanical movements directly in general clinical practiceShow answer & explanation →
Q41.
The type of muscle that is under voluntary (conscious) control is:
A skeletal muscleB cardiac muscleC smooth muscleD involuntary muscleShow answer & explanation →
Q42.
The involuntary muscle found in the walls of internal organs is:
A smooth muscleB skeletal muscleC only cardiac muscleD striated muscleShow answer & explanation →
Q45.
The point of communication between two neurons is the:
A synapseB node of RanvierC axon hillockD dendriteShow answer & explanation →
Q46.
The supporting and protecting cells of nervous tissue are the:
A neurogliaB erythrocytesC plateletsD osteocytesShow answer & explanation →
Q48.
A simple epithelium made of a single layer of flat cells is called:
A squamous epitheliumB columnar epitheliumC cuboidal epitheliumD stratified epitheliumShow answer & explanation →
Hard - 25 questions Q51.
Digestion in the cockroach gut is aided by six to eight blind tubular outgrowths at the junction of the foregut and midgut called:
A Malpighian tubulesB Hepatic caecaC Gastric caecaD Salivary glandsShow answer & explanation →
Q52.
In earthworm nutrition, the presence of a well-developed typhlosole in the intestine is functionally significant because it:
A Increases absorptive surface areaB Grinds food particlesC Stores excess bloodD Secretes the cocoonShow answer & explanation →
Q53.
Skeletal muscle fibres appear striated because the arrangement of actin and myosin produces:
A Randomly scattered granulesB A single central nucleusC Alternate light and dark bandsD Branching cross-bridgesShow answer & explanation →
Q54.
A histologist observes a connective tissue with an abundant fluid matrix, no fibres, and cells that transport gases and defend the body. This tissue is best classified as:
A Dense connective tissueB Specialised connective tissueC Loose connective tissueD CartilageShow answer & explanation →
Q55.
In the cockroach, spermathecae are present in the female and open into the genital chamber, indicating their role in:
A Excretion of wastesB Producing digestive enzymesC Grinding foodD Storing sperm after matingShow answer & explanation →
Q56.
Malpighian tubules in insects and nephrons in the vertebrate kidney both remove nitrogenous waste from a body fluid. What term best describes this relationship between the two structures?
A Homologous organs, since they share a common evolutionary origin according to most researchers in the majority of cases studiedB Analogous organs, since they perform a similar function but differ in structure and developmental originC Vestigial organs retained from a shared excretory ancestor in both groups as widely reported in standard practiceD Convergent duplications of the same embryonic mesodermal structure in both phyla under most conditions encounteredShow answer & explanation →
Q57.
A tissue sample shows branched, uninucleate, striated fibres joined end-to-end at specialised junctions that allow synchronised contraction. Which tissue is this, and why does its structure matter functionally?
A Skeletal muscle; its long multinucleate fibres allow finely graded, precise voluntary motor control as commonly observed in practice in many documented casesB Cardiac muscle; the intercalated discs and branching let the electrical signal spread rapidly so the heart contracts as one coordinated unitC Smooth muscle; its unbranched spindle-shaped fibres generate slow, sustained involuntary contractions according to conventional understandingD Areolar connective tissue; its loose fibroblast network anchors and cushions adjacent organs in routine practice overall in most casesShow answer & explanation →
Q58.
Areolar connective tissue, found beneath the skin and around organs, is best described as performing which role?
A A specialized tissue that conducts electrical impulses between organs in typical laboratory settingsB A mainly contractile tissue that generates movement at joints as generally observedC A packing and support tissue that also allows some flexibility between structuresD A rigid, mineralized tissue that bears the body's mechanical load under normal conditionsShow answer & explanation →
Q59.
Neurons and glial cells both originate from the same embryonic tissue but differ chiefly in that:
A Neurons are specialized for impulse conduction, while glia mainly support, nourish, and protect neuronsB Neurons lack a nucleus, while glial cells retain one throughout life according to most studies in the majority of documented casesC Glial cells form synapses with muscle fibres while neurons cannot as widely reported in standard reference materialD Glia alone are excitable and conduct nerve impulses over long distances under usual circumstancesShow answer & explanation →
Q60.
In the cockroach, the haemocoel is a body cavity filled with haemolymph that bathes the tissues directly. This is a hallmark of which type of circulatory arrangement?
A A closed circulatory system identical in plan to the vertebrate systemB A double circulatory system with separate pulmonary and systemic circuitsC A purely diffusion-based system lacking a pumping organ altogetherD An open circulatory system, where blood is not always confined to vesselsShow answer & explanation →
Q61.
Adipose connective tissue and cartilage both arise from mesenchyme, yet adipose tissue is classified separately because its cells mainly function to:
A Generate red blood cells within a network of fine reticular fibres in most observed casesB Secrete a firm, flexible matrix that resists compression at joints under most conditions studiedC Store fat as an energy reserve and provide insulation, rather than to bear mechanical loadD Contract rhythmically to assist in the movement of internal organs under typical physiological conditionsShow answer & explanation →
Q62.
The presence of intercalated discs is a structural feature unique to which tissue, and what does it enable functionally?
A Skeletal muscle; they anchor each fibre individually to the tendon according to standard texts in general clinical practiceB Cardiac muscle; they allow rapid electrical coupling between adjacent fibres for synchronized contractionC Areolar tissue; they bind collagen fibres together for elasticity in most reference accounts under normal conditionsD Smooth muscle; they allow independent, asynchronous contraction of each cell as frequently documentedShow answer & explanation →
Q63.
Compound epithelium is typically found at body sites such as the skin epidermis and the lining of the oesophagus mainly because:
A Multiple layers allow faster diffusion of gases across the tissueB Multiple cell layers offer greater mechanical protection against abrasion and wearC A single cell layer would conduct electrical impulses more efficiently at these sitesD A single layer would secrete more mucus than is needed at these locationsShow answer & explanation →
Q64.
Within the same individual, skeletal muscle fibres are multinucleate and unbranched, whereas cardiac muscle fibres are branched and usually uninucleate or binucleate. This structural difference relates functionally to:
A Skeletal branching, which helps spread impulses through muscle in a coordinated way; cardiac fibres are built for strong, voluntary, directional pulls as generally observedB Cardiac branching, which helps spread the contraction wave through the heart in a coordinated way; skeletal fibres are built instead for strong, voluntary, directional pullsC Neither tissue showing any branching, since branching mainly occurs in smooth muscle in the majority of documented cases as widely reported in standard reference materialD Both tissues being branched equally, with the mainly difference being their location in the body in typical laboratory settings under usual circumstances according to most studiesShow answer & explanation →
Q65.
Hyaline cartilage at the articulating ends of long bones reduces friction during movement mainly because its matrix is:
A Smooth and somewhat compressible, formed of chondrocytes embedded in a flexible but firm ground substanceB Vascularized throughout, allowing rapid nutrient delivery to chondrocytes according to standard textsC Composed mainly of keratin fibres arranged in a parallel bundle in most observed cases under typical physiological conditionsD Heavily mineralized with calcium salts, making it as rigid as bone itself under most conditions studiedShow answer & explanation →
Q67.
Blood is regarded as a connective tissue because its cells lie in a ___ matrix:
A fluid (plasma)B solid formC gaseous formD crystalline formShow answer & explanation →
Q68.
The part of a neuron that carries impulses away from the cell body is the:
A axonB dendriteC nucleusD synapseShow answer & explanation →
Q69.
The part of a neuron that receives incoming impulses is the:
A dendriteB the axonC the nucleusD the myelinShow answer & explanation →
Q70.
The fatty insulating layer around some nerve axons is the:
A myelin sheathB cell wallC outer capsuleD tissue cortexShow answer & explanation →
Q71.
In an earthworm, gas exchange (respiration) takes place through the:
A moist skinB paired lungsC feathery gillsD branching tracheaShow answer & explanation →
Q75.
Cartilage differs from bone mainly in being:
A softer and flexibleB much harderC completely non-livingD muscular in natureShow answer & explanation →