Structural Organization

Question 1

Statement 1: Bright yellow, red and green coloured cockroaches have also been reported in temperate regions.

Answer 1

False
Tropical regions

Question 2

Their size ranges from………….. inches

Answer 2

¼ inches to 3 inches (0.6-7.6 cm)

Question 3

Periplaneta americana size is………. In mm

Answer 3

34 to 53mm

Question 4

Head is formed by the fusion of……..segments and shows great mobility in all directions due to flexible……..

Answer 4

six

neck

Question 5

The head capsule bears a pair of…………

Answer 5

compound eyes

Question 6

Statement 1: In females, the 8th sternum is boat shaped and together with the 8th and 9th sterna forms a brood or genital pouch
Statement 2: Posterior part of brood pouch contains female gonopore, spermathecal pores and collateral glands

Answer 6

Both statements are incorrect
7th sternum
Anterior part

Question 7

Statement 1: In males, genital pouch or chamber is bounded dorsally by 9th and 10th terga and ventrally by the 9th sternum
Statement 2: It contains ventral anus, ventral male genital pore and gonapophysis.

Answer 7

Statement 1 is correct but statement 2 is incorrect
It contains dorsal Anu’s………..

Question 8

Statement 1: A ring of 6-8 blind tubules called hepatic or gastric caeca is present at the junction of midgut and hindgut , which secrete digestive juice
Statement 2: At the junction of midgut and hindgut is present another ring of 100-120 yellow coloured thin filamentous Malpighian tubules.

Answer 8

Both statements are false
Statement 1: at junction of foregut and midgut
Statement 2: 100 to 150

Question 9

The hindgut is [narrow/broader] than midgut and is differentiated into ileum, colon and rectum.

Answer 9

broader

Question 10

The respiratory system consists of a network of trachea, that open through……… pairs of small holes called spiracles present on the lateral side of the body.

Answer 10

10

Question 11

In addition, the fat body, nephrocytes and urecose glands also help in…………

Answer 11

excretion

Question 12

compound eyes are situated at the [dorsal/ventral] surface of the head

Answer 12

dorsal

Question 13

Each eye consists of about……..hexagonal ommatidia

Answer 13

2000

Question 14

Male reproductive system consists of a pair of testes one lying on each lateral side in the…….abdominal segments.

Answer 14

4th -6th

Question 15

A characteristic mushroom-shaped gland is present in the……. abdominal segments which functions as an accessory reproductive gland

Answer 15

6th-7th

Question 16

Statement 1: The external genitalia are represented by male gonapophysis or phallomere
Statement 2: These are chitinous symmetrical structures, surrounding the male gonopore

Answer 16

Statement 1 is correct and 2 is incorrect
These are asymmetrical

Question 17

Statement 1: The female reproductive sysytem consists of two large ovaries, lying laterally in the 2nd – 6th abdominal segments.
Statement 2: Each ovary is formed of a group of eight ovarian tubules or ovarioles, containing a chain of developing ova

Answer 17

Both statements are correct

Question 18

A pair of spermatheca is present in the……..segment which opens into the genital chamber.

Answer 18

6th

Question 19

Ootheca is a dark reddish to blackish brown capsule, about…….. long.

Answer 19

3/8” (8 mm)

Question 20

On an average, females produce………… oothecae, each containing…………. eggs arranged into …….. rows

Answer 20

9-10

14-16

2

Question 21

Statement 1: The colour of dorsal side of body is generally olive green with dark irregular spots.
Statement 2: On the ventral side the skin is uniformly pale yellow.

Answer 21

Both statements are correct

Question 22

The frog never drinks water but absorb it through the skin.

Answer 22

True

Question 23

Statement 1: The hind limbs end in five digits and they are larger and muscular than fore limb
Statement 2: fore limbs end in four digits

Answer 23

Both statements are correct

Question 24

copulatory pad on the first digit of the hind limbs

Answer 24

False
Fore limbs

Question 25

Assertion: The alimentary canal is short Reason :frogs are carnivores and hence the length of intestine is reduced

Answer 25

Both are correct and R is correct explanation of A

Question 26

Partially digested food called…….is passed from stomach to the first part of the small intestine

Answer 26

chyme

Question 27

During aestivation and hibernation gaseous exchange takes place through……..

Answer 27

skin

Question 28

Statement 1: A oval structure called sinus venosus joins the left atrium atrium. Statement 2: It receives blood through the major veins called vena cava.

Answer 28

Statement 1 is incorrect and 2 is correct It is triangular structure which is present dorsal to right atrium and joins right atrium

Question 29

The ventricle opens into a sac-like…………on the……….side of the heart.

Answer 29

conus arteriosus ventral

Question 30

Statement 1: Special venous connection between liver and intestine as well as the kidney and upper parts of the body are present in frogs. Statement 2: The former is called hepatic portal system and the latter is called renal portal system.

Answer 30

Statement 1 is incorrect and 2 is correct Kidney and lower parts of body are involved

Question 31

These are compact, dark red and bean like structures situated a little posteriorly in the body cavity on both sides of vertebral column. Who am I?

Answer 31

Kidneys

Question 32

The ureters act as urinogenital duct which opens into the cloaca in…….

Answer 32

Males

Question 33

The frog excretes…….and thus is an………..animal.

Answer 33

urea ureotelic

Question 34

Assertion: The system for control and coordination is highly evolved in the frog. Reason: It includes both neural system and endocrine glands

Answer 34

Both are correct and R is correct explanation for A

Question 35

There are…….pairs of cranial nerves arising from the brain

Answer 35

ten

Question 36

Forebrain includes Name 3 structures

Answer 36

olfactory lobes paired cerebral hemispheres unpaired diencephalon.

Question 37

midbrain is characterised by a pair of……….

Answer 37

optic lobes Sensory processing like vision and hearing

Question 38

Hind-brain consists of Name 2 parts

Answer 38

cerebellum Coordinate motor activities Balancing and equilibrium medulla oblongata. Regulations of blood pressure and heart rate

Question 39

Frog has different types of sense organs, namely

Answer 39

organs of touch (sensory papillae) taste (taste buds) smell (nasal epithelium) vision (eyes) hearing (tympanum with internal ears).

Question 40

……. & ……….. are well-organised sense structures and the rest are cellular aggregations around nerve endings

Answer 40

eyes internal ears

Question 41

Males have pair of yellowish…….. testes which are found adhered to the upper part of kidneys by a double fold of peritoneum called………..

Answer 41

Ovoid mesorchium

Question 42

Vasa efferentia are…….in number that arise from testes.

Answer 42

10-12

Question 43

A mature female can lay……. To…….. ova at a time

Answer 43

2500 to 3000

Question 44

Muscular tongue is present, which is……..at the tip and is used in capturing the prey

Answer 44

bilobed

Question 45

Statement 1: Fertilisation is external and takes place in water Statement 2: The eggs hatch into tadpoles, which metamorphose into frogs.

Answer 45

Both are correct

Question 46

Mast cells secrete 3 different hormones name them and their function

Answer 46

Heparin: anticoagulant Serotonin: vasoconstriction Histamine: vasodilation

Question 47

Difference between collagen and elastin fibres

Answer 47

Collagen: white colour Present in bundles Unbranched Provide strength Elastin: Yellow colour Present individually Branched Provide elasticity

Question 48

Tendons consist of……… fibres only

Answer 48

Collagen

Question 49

Covering of cartilage is called……

Answer 49

Perichondrium

Question 50

Define MEROCRINE & APOCRINE GLANDS

Answer 50

Merocrine glands release their secretions directly onto the surface of the skin through exocytosis without losing any cellular material. These include eccrine sweat glands found throughout most of the body, responsible for regulating body temperature. Apocrine glands, on the other hand, release their secretions by pinching off a portion of the cell, which can include cellular debris. These glands are primarily located in areas like the armpits and groin, becoming active during puberty and are associated with scent production.

Question 51

Trace correct path of passage of the sperm in male Rana tigrina:

Answer 51

Testes → Vasa efferentia → Kidney → Bidder’s canal → Urogenital duct → Cloaca