TEST OF PRACTICAL KNOWLEDGE QUESTION 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 i...
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.
(a)(i) The life process associated with specimen E in mammals is respiration, that is, gaseous exchange.
(a)(ii) Similarities between the surface of specimen E and the skin of specimen F are:
Both surfaces are thin.
Both are moist and richly supplied with blood capillaries.
(b)(i) Specimen F functions efficiently in a moist terrestrial habitat, usually near ponds or other water bodies.
(b)(ii) Observable adaptive features of specimen F include:
Its moist skin permits gaseous exchange through the skin.
Its long, muscular hind limbs and webbed toes enable it to hop on land and swim in water.
(c)(i)
Observation
Inference
The cortex of the transverse section turns blue-black with iodine solution.
Starch is present in the cortex.
(c)(ii) Food is stored in the cortex, especially in the cortical parenchyma.
(c)(iii) The transport tissues are xylem and phloem.
(c)(iv) Two supporting tissues present are collenchyma and sclerenchyma.
(d) Transverse section of the stem of specimen G
A fully labelled transverse section of the stem of specimen G.
Title: Transverse section of a dicotyledonous stem (specimen G).
