Study specimens E, F, G1 and G2 carefully and use them to answer questions 2(a) to 2(d).
(a)(i) Name the life process in mammals that is associated with specimens E.
(ii) State two structural similarities between the surface of specimen E and the skin of specimen F.
(b)(i) Name the habitat in which specimen F will function efficiently.
(ii) Explain how two observable features of specimens F adapt the organism to its habitats.
(C)(i) Using the blade provided cut a thin transverse section of the stem of specimens G add two drops of freshly prepared iodine solution to the cut section.
Record your observation and inferences :
(ii) In which part of the stem is food stored.
(iii) Name two tissues used for transportation of materials in specimens G,
(iv) List two supporting tissues present in specimen G,
(d) Make a drawing 10-12 cm long of a cut transverse section of the stem of specimen G, and label fully.
Explanation
(a)(i) Life process in mammals associated with specimen F:
-External Respiration/Respiration/ Gaseous exchange/Breathing.
(ii)Similarities between Specimens E and F: - both richly supplied with blood capillaries/vascularised,
-both have thin surface;
both are moist,
both have large surface area.
(b)i)Habitat of specimen F: Land/ terrestrial/Moist place Pond
(ii) Observable features that adapt specimen F to its habitat:
-Streamlined body for ease movement in water,
- Webbed digits of hind limb(s) for swimming
-Presence of poisonous gland for protection against predators
-Muscular long hind limbs for hopping/jumping:
-Stout short forelimbs for absorbing shock on landing.
-large bulging eyes for wide vision.
-Moist skin for gaseous for exchange/breathing/respiration
(c)(i)Observation: cortex stained blue-black, starch present in the cortex.
(ii)Part of stem where food is stored: cortex/parenchyma
(iii) Tissues for transportation in G: Xylem; phloem
(iv) Supporting Tissues in Gi; Collenechyme, scelerenechyme, xylem, parenchyma.
