Wednesday, October 28, 2020

2017 March | HSE +1 Exam | Zoology - Answers

ZOOLOGY (2017 MARCH, +1)

ANSWERS

1.    c) Kingdom → Phylum → Class → Order → Family → Genus → Species.


2.    b) Tracheal system


3.    A. Specialized connective tissue 

       B. Adipose tissue 

       C. Irregular 

       D. Cartilage


4.        

A

B

C

Phylum/class

Common example

Unique feature

Pisces

Scoliodon

Presence of 2 chambered heart

Mammalia

Felis

Presence of hairs

Arthropoda

Aedes

Open circulatory system

 

OR

a) Reptilia. E.g. Crocodiles
b) Ctenophora. E.g. Ctenoplana
c) Hemichordate. E.g. Balanoglossus


5.   Aschelminthes (Roundworms).


6.        .

Radial symmetry

Bilateral symmetry

Physalia

Tapeworm

Adamsia

Fasciola


7.   Inspiration and expiration.


Inspiration

Expiration

Diaphragm contracts
Contraction of external intercostal muscles
Thoracic volume increases
Intra pulmonary pressure decreases

Diaphragm relaxes
Relaxation of external intercostal muscles
Thoracic volume decreases
Intra pulmonary pressure increases

8.   a) A – Canine     B – Molars

      b) ii) 2123/2123


9.   A. Serine/ Amino acid B. Adenylic acid or Adenosine phosphate or AMP C. Cholesterol


10. Antibody – Sensory receptor


11. A – Meromyosin B – Light meromyosin


12. a) ii) Corpus luteum.
b) A – Axonite B – Synaptic vesicle C – Synaptic cleft D – Neurotransmitter (or its example)


13. A – ANF (atrial natriuretic factor
      B – Lowers blood glucose level (Hypoglycemic hormone)
      C – kidney/ JGA
      D – Thymosin


14. a) iii) P-wave represents auricular depolarization.
b) A – Aorta 

          B – Superior vena cava 

          C – Pulmonary artery 

          D - Chordae tendinae


15. Prawn – Antennal gland
Earthworm – Nephridia

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