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