Teachers recommend solving Kerala Syllabus Plus One Zoology Previous Year Question Papers and Answers Pdf Board Model Paper 2021 to improve time management during exams.
Kerala Plus One Zoology Board Model Paper 2021 with Answers
I. Answer any 3 questions from 1 to 6. Each carries 1 score. (3 × 1 = 3)
Question 1.
Name the tissue which is specialized to store fat.
Answer:
Adipose tissue
Question 2.
Select the odd one out. [Lectins, Alkaloids, Amino acid, Drugs]
Answer:
Amino acids
Question 3.
Which blood group is known as ‘Universal recipients’?
Answer:
AB group
Question 4.
Expand the following terms:
(a) TV
(b) RV
Answer:
(a) Tidal volume
(b) Residual Volume
Question 5.
Which one is NOT associated with the structure of eye?
[Cornea, Choroid, Cochlea, Iris]
Answer:
Cochlea
Question 6.
Observe the relationship between the first two terms and fill in the blanks:
(a) Acoelomate Phylum Platyhelminthes
Pseudocoelomate : _______
(b) Cinidoblast : Phylum Cnidaria
Radula : _______
Answer:
(a) Phylum Aschelminthes
(b) Phylum Mollusc
II. Answer any 9 questions from 7 to 24. Each carries 2 scores. (9 × 2 = 18)
Question 7.
Distinguish between diphyodont and thecodont dentition.
Answer:
Diphvodont dentition : Organisms have two sets of teeth during their life,as temporary teeth replaced by a set of permanent teeth. This type of dentition is called diphyodont.
Thecodont dentition : Here tooth is embedded in a socket of jawbone,this type of attachment is,called thecodont.
Question 8.
Match the following:
| A | B |
| Reptilia | Alligator |
| Mammalia | Pteroptus |
| Aves | Corvus |
| Amphibia | Salamandra |
Answer:
| A | B |
| Reptilia | Salamandra |
| Mammalia | Alligator |
| Aves | Pteroptus |
| Amphibia | Corvus |
Question 9.
Differentiate between Chondrichthyes and Osteich- thyes with an example for each.
Answer:
| Class – Chondrichthyes | Class – Osteichthyes |
| They have cartilaginous endoskeleton | They have bony Endoskeleton |
| Gill slits are separate and without operculum | They have four pairs of , gills which are covered ’ by an operculum on each side |
| The skin with minute placoid scales | Skin is covered with cycloid/ctenoid scales |
| Air bladder is absent | Air bladder is present |
Examples chondrichthyes; Scoliodon Examples Osteichthyes; Catla
Question 10.
The peculiar features of different phyla are given below:
(a) Presence of ostia, Osculum and Choanocytes.
(b) Presence of ciliated comb plates and exhibits biluminescence.
(c) Body shows metameric segmentation and nephredium is the excretory organ.
(d) Body with chitinous exoskeleton and Joined appendages.
Identify the Phyla (a), (b), (c) and (d)
Answer:
(a) Phylum – Poriferac
(b) Phylum – Ctenophora
(c) Phylum – Annelida
(d) Phylum – Arthropoda
Question 11.
ECG is a graphical representation of the electrical activity of the heart during a cardiac cycle.
(a) Expand the term ECG.
(b) What does the P-wave represent?
Answer:
(a) Electrocardiogram
(b) P wave represents the electrical excitation (depolarisation) of the atria.
Question 12.
A number of bones related with our appendicular skeletal system is given below. Arrange them into two groups with appropriate headings.
[Humerus, Tibia, Tarsals, Ulna, Radis, Fibula, Carpals, Femur]
Answer:
| Bones in forelimb | Bones in Hindlimb |
| Humerus | Femur |
| Radius | Tibia |
| Ulna | Fibula |
| Carpals | Tarsals |
Question 13.
In the given flow chart, label the missing parts:
Answer:
(a) Loose connective tissue
(b) Skin
(c) Bone/cartilage
(d) Bone/Cartilage
Question 14.
Enlist any four types of synovial joints.
Answer:
Synovial joints
(a) Ball and socket joint
(b) Hinge joint
(c) Pivot joint
(d) saddle joint
Question 15.
Distinguish between Uricotelic and Ureotelic animals with one example each.
Answer:
| Ureotelic | Uricotel |
| The organism that excrete urea is called ureotelic | The organism that excrete uric acid is called uricotelic |
| Eg:Mammals | Eg: Birds and Insects |
Question 16.
Complete the given table:
| Endocrine gland | Hormone | Function |
| Pineal gland | (a) | Regulation of 24 hour diurnal rhythm |
| (b) | Prolactin | Growth of mammary gland and formation of milk |
| Pancreas | (c) | Increase blood glucose level |
| Heart | (d) | Dilation of blood vessel and reduces blood pressure |
Answer:
(a) Melatonin
(b) Pituitary gland
(c) Glucagon
(d) ANF orAtrial natri uretic factor
Question 17.
Observe the diagram given below
enterjcus on molecules given below complete each reaction with suitable terms.
(a) Identify the class in which it belongs.
(b) Write a note on its migration.
Answer:
(a) Class: Cyclostomata
(b) Cyclostomes are marine but migrate for spawning to fresh water. After spawning, within a few days, they die.Their larvae after metamorphosis, return to the ocean.
Question 18.
The description of low taxonomic aids are given below:
(a) Taxonomic aid based on the contrasting characters generally in a pair called couplet.
(b) A storehouse of collected plant specimens that are dried, pressed and preserved on sheets. Name the taxonomic aids (a) and (b)
Answer:
(a) Key
(b) Herbarium
Question 19.
The different parts of alimentary canal of cockroach is listèd below. Arrange the in a sequential order of food passing through them.
(Crop, Colon, Qesophagus, Gizzard, Ifleum, Rectum)
Answer:
Oesophagus → Crop → Gizzard → Ileum → Colon → Rectum.
Question 20.
The action of different enzymes present in succas enterjcus on molecules given below complete each reaction with suitable terms.
Answer:
(a) Dipetidase
(b) Glucose
(c) Lactase
(d) Fructose
Question 21.
Kidneys are the main excretory organ in human body:
(a) Name the structural and functional unit of kidney.
(b) List out 3 main processes of urine formation.
Answer:
(a) Nephron
(b) i) Glomerular Filtration
ii) Tubular Reabsorption
iii) Tubular Secretion
Question 22.
In a classroom discussion a student said that “Proteins are homopolymer”.
(a) Do you agree with this statement ?
(b) Name the most abundant protein exists in the animal world.
Answer:
(a) No
(b) Collagen
Question 23.
Arrange the following words in a sequential order according to transmission of sound wave.
[Eardrum, Basilar membrane, Ear ossicles, Oval window]
Answer:
Eardrum → Ear ossicles → Oval window → Basilar membrane
Question 24.
An endocrine gland which has a major role in the development of immune system and is degenerate in aged individuals.
(a) Identify the endocrine gland.
(b) Name the hormone which secreted from it.
Answer:
(a) Thymus gland
(b) Thymosin
III. Answer any 3 questions from 25 to 30. Each carries 3 scores. (3 × 3 = 9)
Question 25.
Observe the graph and write answer for the following questions :
(a) Name of the graph.
(b) What are the four factors that affect binding of oxygen with Haemoglobin.
Answer:
(a) Oxygen dissociation curve
(b) pO2, pCO2temperature and H+
Question 26.
(a) In the following chart A, B, C and D represents:
(b) Name the tract of nerve fibres which help to connect the two cerebral hemispheres.
Answer:
(a) A – Forebrain
B – Hypothalamus
C – Corpora quadrigemina
D – Cerebellum
(b) Corpus callosum
Question 27.
(a) Identify the class enzyme which does the following type of chemical reaction.
S-reduced + S’-oxidised → S-oxidised + S’- reduced.
(b) Write any three factors whjch affect enzyme activity.
Answer:
(a) Oxidoreductase /Dehydrogenase
(b) Temperature, pH and Concentration of substrate,
Question 28.
Alimentary canal of cockroach is given.
(a) Label the parts identified as A, B, C and D
(b) Write the function of ‘C’.
Answer:
(a) A-Crop
B – Gizzard
C – Hepatic caecae
D – Malpighian tubule
(b) It secrete digestive juice
Question 29.
Fill in the blanks to complete the Schematic repre-sentation.
Answer:
(a) Gnathostomata
(b) Cyclostoamata
(c) Osteichthyes
(d) Tetrapoda
(e) Reptilia
(f) Mammals
Question 30.
Match the terms in Column A with those in Column B and C:
| A | B | C |
| BlOOd group | Antigens on RBCs | Antibodies in Plasma |
| A | A, B | Anti-A, B |
| AB | Nil | Anti-B |
| O | A | Ni |
Answer:
| A | B | C |
| Blood group | Antigens RBCs | Antibodies in plasma |
| A | A | Anti- B |
| AB | A,B | Nil |
| O | Nil | Anti – A, B |