0 of 51 answered

Zoology

Structural Organisation

51 questions · Click an option and press Check Answer to reveal the result

The terga, sterna and pleura of cockroach body are joined by

Muscular tissue

Arthrodial membrane

Cartilage

By tendons

Statement I : Exocrine glands secrete mucus, earwax, oil, milk, digestive enzymes and other cell products.

Statement II: Gap junctions facilitate the cells to communicate with each other by connecting cytoplasm of adjoining cells.

Both statements I and II are correct.

Both statements I and II are incorrect.

Only statement I is correct.

Only statement II is correct.

In Cockroach, the blood (hemolymph) is composed of:

Hemoglobin and RBCs

Colorless plasma and hemocytes

Plasma and nucleated RBCs

Hemerythrin and lymphocytes

Assertion : Visceral muscles have a striped appearance under the microscope and hence are called striated muscles.

Reason : As their activities are under the voluntary control of the nervous system, they are known as voluntary muscles too.

Assertion and reason both are true and the reason is correct explanation of assertion.

Assertion and reason both are true but reason is not correct explanation of assertion.

Assertion is true but reason is wrong.

Assertion and reason both are wrong.

Which of the following statements is correct regarding the morphology of a cockroach?

The head is formed by the fusion of eight segments and shows great mobility.

In both sexes, the 10th segment bears a pair of jointed filaments structures called anal styles.

The first pair of wings (tegmina) are transparent and used in flight.

In females, the 7th sternum is boat-shaped and together with 8th and 9th sterna forms a brood or genital pouch.

In Cockroach, the exchange of gases occurs at the:

Spiracles

Tracheoles

Trachea

Ctenidia

The mouth of the Cockroach is directed downwards, a condition known as:

Prognathous

Opisthognathous

Hypognathous

Epignathous

Ciliated columnar epithelium is found in :-

Stomach & blood vessels

Fallopian tube

Proximal convoluted tubule of nephron

Airsac

The triangular structure that joins the right atrium of a frog's heart is called:

Conus arteriosus

Sinus venosus

Foramen ovale

Truncus arteriosus

The thin-walled, large, translucent, and highly vascularized structures in a frog's heart that receive blood are:

Ventricles

Atria

Sinus venosus

Conus arteriosus

In the frog, the "Bidder's canal" is present in:

Testes

Kidney

Ovary

Liver

Which part of the cockroach brain sends nerves to the antennae?

Protocerebrum

Deutocerebrum

Tritocerebrum

Sub-oesophageal ganglion

In Cockroaches, the mouthparts consist of a labrum, a pair of mandibles, a pair of maxillae, and a labium. Which part acts as a tongue?

Maxilla

Hypopharynx

Labrum

Mandible

The common trait shared by both Cockroach and Frog is:

Nucleated RBCs

Ureotelic excretion

Presence of Cloaca

Ventral nerve cord

Which type of respiration is present in frog during swimming ?

Pulmonary respiration

Cutaneous respiration

Buccal cavity respiration

Gills respiration

Which of the following structures in a frog receives deoxygenated blood from the body before it enters the Right Atrium?

Truncus arteriosus

Conus arteriosus

Sinus venosus

Hepatic portal vein

Which of the following is true regarding the skin of a frog?

It is dry and scaly

It contains thick hair

It is moist and serves as a respiratory organ

It is impermeable to water

Which structure in frog prevents the backflow of blood from ventricle to atria during ventricular contraction?

Spiral valve

Semilunar valves

Auriculo-ventricular valves

Sinus venosus

Mushroom-shaped glands are found in the reproductive system of:

Female Cockroach

Male Frog

Male Cockroach

Female Frog

The type of vision found in cockroaches is:

Monocular vision

Binocular vision

Mosaic vision

Superposition vision

The larva of a frog is called a Tadpole. It respires through:

Lungs

Skin

Gills

Trachea

Which of the following structures in a Cockroach helps in grinding food particles?

Gizzard

Hepatic caeca

Crop

Mesenteron

Statement-I : Myofibrils is the structural unit of skeletal muscle.
Statement-II : Smooth muscle help in transportation of food through digestive tract and gametes through genital tract.

Both statement I and II are correct

Both statement I and II are incorrect

Statement I is correct and II incorrect

Statement II is correct and I is incorrect

The endocrine gland present in frogs that helps in the process of metamorphosis is:

Adrenal

Pancreas

Thyroid

Pituitary

In frog (Rana tigrina), which of the following correctly explains the mechanism of respiration during hibernation?

Respiration occurs mainly through lungs due to increased oxygen demand

Buccopharyngeal respiration increases while cutaneous respiration stops

Cutaneous respiration becomes the primary mode due to moist skin and reduced metabolic rate

Gills redevelop temporarily to facilitate aquatic respiration

Which of the following is not correctly matched?

Cardiac muscle — Heart — Heart contraction

Skeletal muscles — Arm — Movement

Blood — Blood vessels — Transport of various substances

Smooth muscles — Internal organs — Lift up sternum and ribs

The functional unit of excretion in frogs is:

Nephridia

Malpighian tubules

Uriniferous tubules (Nephrons)

Flame cells

The 'vocal sacs' and 'copulatory pad' are characteristic features found in:

Female Frogs

Male Cockroaches

Male Frogs

Both Male and Female Frogs

Match List-I with List-II w.r.t frog.
Choose the correct answer from the options given below:

List-I	List-II
A Cloaca	i Present in the kidney of male frogs to help in sperm passage
B Bidder's Canal	ii A common chamber used to pass faeces, urine, and sperms to the exterior
C Mesorchium	iii A double fold of peritoneum that attaches testes to the kidneys
D Conus Arteriosus	iv A sac-like structure on the ventral side of the heart where the ventricle opens

A-I, B-II, C-III, D-IV

A-II, B-I, C-III, D-IV

A-II, B-III, C-II, D-IV

A-III, B-I, C-IV, D-II

In Cockroaches, the visual units of the compound eyes are called:

Fenestrae

Ommatidia

Ocelli

Sclerites

The heart of a Cockroach consists of an elongated muscular tube lying along the mid-dorsal line. It has how many funnel-shaped chambers?

Choose the incorrect statement regarding the human skeletal system:

The 8th, 9th, and 10th pairs of ribs are called vertebrochondral ribs.

The floating ribs are not connected ventrally to the sternum.

Each half of the pectoral girdle consists of a clavicle and a scapula.

The human skull is monocondylic.

In the digestive system of a frog, the 'Vasa efferentia' are associated with:

Digestion of proteins

Transportation of sperms

Absorption of water

Production of bile

Assertion : Gap junctions help in rapid transfer of ions, small molecules and sometimes big molecules.
Reason : Gap junctions facilitate the cells to communicate with each other by connecting the cytoplasm of adjoining cells.

Assertion and Reason both are correct and reason is the correct explanation of assertion

Assertion and Reason both are correct but reason is not correct explanation of assertion

Assertion is correct but reason is not correct

Assertion is not correct but reason is correct

The number of spiracles present in a cockroach is:

10 pairs

2 pairs

8 pairs

13 pairs

During aestivation and hibernation, a frog respires through:

Lungs

Buccal cavity

Skin

Gills

In Cockroaches, the spermatophores are stored in which part of the male reproductive system?

Testes

Mushroom glands

Seminal vesicles

Ejaculatory duct

Titillator and Pseudopenis in male cockroaches are parts of:

Alimentary canal

Gonapophyses (Phallomeres)

Malpighian tubules

Mushroom glands

Which of the following is correct regarding the specialized connective tissue "Bone"?

The bone cells (osteocytes) are present in spaces called lamellae.

Bone lacks a hard and non-pliable ground substance.

It is the main tissue that provides structural frame to the body.

Bone cells are rich in chondroitin salts which provide strength.

In Cockroach, the secretion of digestive juices occurs in the:

Gizzard

Crop

Hepatic caeca

Rectum

Read the following statements carefully about cockroach-

Statement-I : In male cockroach, a characteristic mushroom shaped gland is present in the 6th-7th abdominal segments, which functions as an accessory reproductive gland.

Statement-II: Blood from sinuses enter heart through ostia and is then pumped anteriorly to sinuses again.

Choose the correct answer from the options given below :

Both Statement-I and II are incorrect.

Statement-I is correct but statement-II is incorrect.

Statement-I is incorrect and Statement-II is correct.

Both Statement-I and Statement-II are correct.

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: The development of Periplaneta americana is paurometabolous.
Reason R: The nymphal stage grows by moulting about 13 times to reach the adult form. In the light of the above statements, choose the correct answer from the options given below.

Both A and R are true, and R is the correct explanation of A.

Both A and R are true, but R is not the correct explanation of A.

A is true, but R is false.

A is false, but R is true.

Frogs differ from humans in possessing:

Thyroid as well as parathyroid

Paired cerebral hemispheres

Hepatic as well as renal portal system

Nucleated Red Blood Cells

Which of the following tissues exerts the greatest control over the body’s responsiveness to changing conditions?

Epithelial tissue

Muscular tissue

Connective tissue

Neural tissue

In a female frog, the ureters and oviducts open separately into the:

Urinary bladder

Cloaca

Rectum

Ureter

Frogs are 'Poikilotherms', which means:

They can regulate their body temperature

Their body temperature varies with the environment

They always maintain a high body temperature

They only survive in frozen environments

(A) Cockroach are nocturnal omnivores that live in damp places throughout the world.
(B) They become residents of human homes and thus are serious pests and vectors of several diseases.
(C) Many species of cockroach are wild and are economic importance.
(D) They are pests, because they destroy food and contaminate it with their smelly excreta.
Select the correct statements regarding the cockroach

A, B and C

B and D

Only C

Assertion (A): Chitinous exoskeleton of arthropods that is responsible for their evolutionary success is made up of lipoglycans.
Reason (R): Building blocks of chitin are chemically modified amino sugars (N-acetyl glucosamine).

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

Both Assertion and Reason are true but Reason is not correct explanation of Assertion.

Assertion is true but Reason is false.

Assertion is false but Reason is true.

Identify the respiratory process in frogs where the mouth remains permanently closed while the nostrils remain open?

Pulmonary respiration

Cutaneous respiration

Buccal respiration

Branchial respiration

In the diagram of a frog (labels A to D), one region in males undergoes a functional structural modification Which is not present in female frogs.

Which of the following correctly identifies this dimorphism?

Label A-Males develop vocal sacs here to dominate feeding territories

Label B - Presence of cloacal chamber with larger opening in males for sperm reception

Label C - Thickened pad develops in males to ensure firm grip on female

Label D -Muscular hindlimbs

The hard exoskeleton of a Cockroach is composed of brown sclerites. The dorsal sclerites are known as:

Sternites

Pleurites

Tergites

Arthrodial membrane

Question Palette

Unattempted

Correct

Incorrect

List-I

List-II

Cloaca

Present in the kidney of male frogs to help in sperm passage

Bidder's Canal

A common chamber used to pass faeces, urine, and sperms to the exterior

Mesorchium

iii

A double fold of peritoneum that attaches testes to the kidneys

Conus Arteriosus

A sac-like structure on the ventral side of the heart where the ventricle opens