Structural Organisation in Animals Important Questions and Answers

Top 50 most important Questions and Answers on Structural Organisation in Animals. Structural Organisation in Animals Important Questions and Answers with FREE PDF are the most important part of Medical Entrance Exams like NEET, AIIMS, JIPMER and other Board Exams.

1 The blood of cockroach is colorless because
(A) There is no respiratory pigment
(B) Circulatory system is open type
(C) Circulatory system is closed type
(D) There are no salts in blood

Answer: There is no respiratory pigment
2 Cockroach blood does not contain respiratory pigments, it means that
(A) Cockroach does not respire
(B) Cockroach respire anaerobically
(C) Oxygen reaches tissue through tracheoles
(D) Oxygen passes to all the tissues through diffusion

Answer: Oxygen reaches tissue through tracheoles
3 How many pairs of spiracles are found in cockroach
(A) 3 pairs in thorax and 10 pairs in abdomen
(B) 2pairs in thorax and 8 pairs in abdomen
(C) 2 pairs in thorax and 6 pairs in abdomen
(D) 1 pair in thorax and 7 pairs in abdomen

Answer: 2pairs in thorax and 8 pairs in abdomen
4 Earthworms are called ‘friends of farmers’ because
(A) They are used as fish meal
(B) Their burrows make the soil loose
(C) They kill the birds due to biomagnification of chlorinated hydrocarbons
(D) They make the soil porous, leave their castings and organic debris in the soil

Answer: They make the soil porous, leave their castings and organic debris in the soil
5 Movement of coelomic fluid helps in locomotion of
(A) Hydra
(B) Frog
(C) Starfish
(D) earthworm

Answer: earthworm
6 In earthworm, septa are absent in
(A) first 4 segments
(B) 5/6,10/11
(C) 5/6,7/8
(D) 6/7,7/8

Answer:first 4 segments
7 In earthworm oxygen carrying haemoglobin occurs in
(A) Plasma
(B) Corpuscles
(C) Both corpuscles and plasma
(D) The statement is wrong

Answer: Plasma
8 The region of earthworm, which is forest of nephridia
(A) Clitellar region
(B) Pharyngeal region
(C) Typhlosolar region
(D) Intestinal region

Answer: Clitellar region
9 Which one of the following is an oxygen carrying blood pigment of earthworm?
(A) Haemocyanin
(B) Haemoglobin
(C) Haemoerythrin
(D) chlorocruorin

Answer: Haemoglobin
10 In frog, two phalenges occur in
(A) pollex
(B) hallux
(C) third finger
(D) third toe

Answer: hallux
11 Which type of tissue forms the inner of a blood vessel?
(A) Epithelial
(B) Connective
(C) Muscle
(D) Nervous

Answer:Epithelial
12 In which of the following, the plasma membrane of the epithelial lining is Modified in to microvilli?
(A) Tubules of the testis
(B) Vagina
(C) Intestine
(D) Urinary tract

Answer:Intestine
13 The actively dividing layer of columnar cells in the epidermis of man is called as the
(A) Stratum granulosum
(B) Stratum lucidum
(C) Stratum Malpighi
(D) Stratum corneum

Answer: Stratum Malpighi
14 The outermost layer of skin called stratum corneum is composed of
(A) Completely dead and keratinised cells
(B) Living and most actively dividing cells
(C) Most of dead keratinized cells but some living cells
(D) Living keratinized cells

Answer: Completely dead and keratinised cells
15 Which type of tissue forms glands?
(A) Epithelial
(B) Connective
(C) Nervous
(D) Muscle

Answer: Epithelial
16 Mostly the mammary glands are modified
(A) Sebaceous glands
(B) Apocrine glands
(C) Cutaneous glands
(D) Holocrine glands

Answer:Apocrine glands
17 Ligaments are made up of
(A) White fibres and some yellow elastic fibres
(B) White fibres only
(C) Yellow fibres only
(D) Yellow fibres and muscle fibres

Answer: White fibres and some yellow elastic fibres
18 The bone of a mammal contains Haversian canals, which are connected by transverse canals known as
(A) Semicircular canals
(B) Inguinal canals
(C) Volkmann’ canal
(D) Bidder’ canal

Answer:Volkmann’ canal
19 Cardiac muscle is made up of branched fibres that are
(A) Non-striated and under voluntary control
(B) Striated and not under voluntary control
(C) Non-striated and not under voluntary control
(D) Striated and under voluntary control

Answer: Striated and not under voluntary control
20 The efferent process of neuron is known as
(A) Dendron
(B) Axon
(C) Cyton
(D) dendrite

Answer: Axon
21 Chloragogen cells are
(A) respiratory only
(B) circulatory only
(C) excretory only
(D) polyfunctional

Answer:polyfunctional
22 Which is characteristic of common cockroach species?
(A) 13-chambered heart
(B) Reduced wings
(C) Cocoon formation
(D) Segmented body

Answer: 13-chambered heart
23 Malpighian tubules of cockroach are found at the junction of
(A) Crop and proventriculous
(B) Stomodaeum and proctodaeum
(C) Mesenteron and proctodaeum
(D) Proctodaeum and stomodaeum

Answer: Mesenteron and proctodaeum
24 Collateral glands of cockroach help in
(A) Formation of ootheca
(B) Formation of oothecal chamber
(C) Copulation
(D) fertilization

Answer:Formation of ootheca
25 Blood glands of pheretima occur in segments
(A) 1,2 and 3
(B) 3,4 and 5
(C) 4,5 and 6
(D) 10,11 and 12

Answer: 4,5 and 6
26 Pharyngeal nephridia of earthworm occur in segments
(A) 3,4 and 5
(B) 4,5 and 6
(C) 5,6 and 7
(D) 6,1 and 8

Answer: 4,5 and 6
27 Open circulatory system is not of physiological hindrance in cockroach because
(A) Heart is simple but chambered
(B) Blood is colorless
(C) Excretion occurs through Malpighian tubules
(D) Circulatory and respiratory systems are not connected

Answer: Circulatory and respiratory systems are not connected
28 Number of eggs contained in an ootheca of cockroach is
(A) 8
(B) 16
(C) 32
(D) 4

Answer:16
29 Pericardial space in cockroach is regularly altered by muscles
(A) Ciliary
(B) Alary
(C) Circular
(D) longitudinal

Answer:Alary
30 What type of metamorphosis occurs in cockroach?
(A) Holometabolous
(B) Hemimetabolous
(C) Paurometabolous
(D) Ametabolous

Answer: Paurometabolous
31 Schwann cells and nodes of Ranvier are found in
(A) neurons
(B) chondroblasts
(C) osteoblasts
(D) gland cells

Answer: neurons
32 The plasma protein, which maintains the osmotic pressure of blood is
(A) albumin
(B) globulin
(C) fibrinogen
(D) prothrombin

Answer: albumin
33 A bipolar neuron has
(A) 1 dendron and 1 axon
(B) 2 axons and 2 dendrites
(C) 2 dendrites and 1 axon
(D) 2 axons and 1 dendrite

Answer: 1 dendron and 1 axon
34 Mast cells of connective tissue contain
(A) Heparin and calcitonin
(B) Serotonin and melanin
(C) Vasopressin and relaxin
(D) Heparin and histamine

Answer: Heparin and histamine
35 Metamerism is characteristic feature of phylum
(A) Porifera
(B) Platyhelminthes
(C) Annelida
(D) Mollusca

Answer:Annelida
36 Blood is red but but there are no red blood cells in
(A) earthworm and leeches
(B) leeches
(C) cockroach
(D) bedbug

Answer: earthworm and leeches
37 Which of the following statements is true for pheretima?
(A) it is a dioecious animal with distinct sexual dimorphism
(B) in it copulation occurs in night in burrow during rainy season
(C) it can copulate throughout the year whenever it rains
(D) it cannot travel both backwards and forwards

Answer: in it copulation occurs in night in burrow during rainy season
38 In earthworm, setae are absent from
(A) clitellum
(B) clitellum, first and last segments
(C) first segment
(D) clitellum and last segment

Answer: clitellum, first and last segments
39 Abdomen of cockroach has segments
(A) 6
(B) 10
(C) 11
(D) 12

Answer: 10
40 First wing in cockroach is a hard leathery structure and is called
(A) Elytron attached to prothorax
(B) Tegmina attached to prothorax
(C) Elytron attached to mesothorax
(D) Tegmina attached to mesothorax

Answer: Tegmina attached to mesothorax
41 Which of the 2 parts in cockroach are fundamentally similar in structure?
(A) Anal styles and labrum
(B) Maxillae and legs
(C) Mandibles and antennae
(D) Wings and cerci

Answer:Maxillae and legs
42 In cockroach lower lip or labium refers to
(A) Mentum
(B) Submentum
(C) First maxilla
(D) Second maxilla

Answer: Second maxilla
43 Number of Malpighian tubules present in cockroach is
(A) 60-70
(B) 80-90
(C) 100-150
(D) 200-250

Answer: 100-150
44 Three chambered heart of frog is not as proficient as four chambered human heart because
(A) Heart muscles are not strong
(B) It does not hold enough blood
(C) Ventricle does not pump blood properly
(D) Oxygenated and deoxygenated bloods mix up

Answer: Oxygenated and deoxygenated bloods mix up
45 Chloragogen cells of pheretima are specialized for
(A) Nutrition
(B) Reproduction
(C) Excretion
(D) Respiration

Answer: Excretion
46 Mating in earthworm occurs during
(A) Night in rainy season
(B) Night in water
(C) Night in summer season
(D) Day in rainy season

Answer: Night in rainy season
47 Structure present in man but absent in frog is
(A) Salivary glands
(B) Pancreas
(C) Adrenal glands
(D) Gall bladder

Answer: Salivary glands
48 The glands present in skin of frog are
(A) Mucous and poisonous
(B) Sweat and mammary
(C) Sweat and sebaceous
(D) Sweat and mucous

Answer:Mucous and poisonous
49 In frog, jelly around the eggs is deposited
(A) In water after fertilization
(B) In water during fertilization
(C) In the oviduct
(D) In the ovary

Answer: In the oviduct
50 The heart in cockroach is longitudinal beaded and there are
(A) 2 chambers in thorax and 11 in abdomen
(B) 3 chambers in thorax and 10 in abdomen
(C) 2 chambers in thorax and 10 in abdomen
(D) 3 chambers in thorax and 9 in abdomen

Answer: 3 chambers in thorax and 10 in abdomen

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