TEST OF PRACTICAL KNOWLEDGE QUESTION Study Specimens E(Paw paw), F(Tomato), and H(Legume) and answer questions 2(a) to 2(f). (a) What types of fruits are sp...
Study Specimens E(Paw paw), F(Tomato), and H(Legume) and answer questions 2(a) to 2(f).
(a) What types of fruits are specimens E, F, and H?
E: _________ F:_________ H: ___________
(b) Name the types of placentation possessed by each of specimens E, F and H:
(c) Name one agent of dispersal each of specimens E, F and H? E: H: F: F:
(d)(i) Explain briefly how specimen E is dispersed. (ii) State two types of nutrients present in specimen E.
(e)(i) What is the color of specimen H? (ii) What does the color of specimen H signify?
(f) Using the scalpel/blunt knife provided, cut open specimen H along the line of split from one side only.
(i) Name the type of placentation found in specimen H.
(ii) Make a drawing, 6 cm to 8 cm long of the two split halves of specimen H while still joined at one length and label fully.
Study of Specimens E (pawpaw fruit), F (tomato fruit) and H (pod of Pride of Barbados)
(a) Types of fruit E: berry F: berry H: legume (pod)
(b) Types of placentation E: parietal F: axile H: marginal
(c) One agent of dispersal each E: man / animal F: man / animal H: explosive (self / mechanical) mechanism
(d)(i) How specimen E is dispersed The epicarp of the pawpaw is brightly coloured and the mesocarp is sweet, fleshy and succulent. This attracts man and animals, who pluck and eat the juicy edible parts and then throw away, drop or deliberately plant the seeds some distance from the parent plant. In this way the seeds are carried far from the parent and dispersed.
(d)(ii) Two nutrients present in specimen E Vitamins (e.g. vitamin A and vitamin C) and carbohydrates (sugars such as fructose and sucrose). It also contains mineral salts and water.
(e)(i) Colour of specimen H:green.
(e)(ii) Significance of the colour: the green colour shows that the pod is unripe (immature) and still contains chlorophyll, so it is still photosynthesising and has not yet dried and turned brown ready to split and shed its seeds.
(f)(i) Type of placentation found in specimen H:marginal placentation - the ovules/seeds are borne in a single row along the fused ventral margin (suture) of the single carpel.
(f)(ii) Drawing of the two split halves of specimen H, still joined at one end, fully labelled
The pod of Pride of Barbados split into two pericarp valves that remain joined at the base, with the seeds borne in a single row along the margin of each valve (marginal placentation).
The pod splits along the two sutures into two boat-shaped valves of the pericarp (fruit wall) that remain joined at the stalk (base) end. The seeds are seen attached by short stalks (funicles) in a single row along the margin of each valve, confirming marginal placentation.
Study of Specimens E (pawpaw fruit), F (tomato fruit) and H (pod of Pride of Barbados)
(a) Types of fruit E: berry F: berry H: legume (pod)
(b) Types of placentation E: parietal F: axile H: marginal
(c) One agent of dispersal each E: man / animal F: man / animal H: explosive (self / mechanical) mechanism
(d)(i) How specimen E is dispersed The epicarp of the pawpaw is brightly coloured and the mesocarp is sweet, fleshy and succulent. This attracts man and animals, who pluck and eat the juicy edible parts and then throw away, drop or deliberately plant the seeds some distance from the parent plant. In this way the seeds are carried far from the parent and dispersed.
(d)(ii) Two nutrients present in specimen E Vitamins (e.g. vitamin A and vitamin C) and carbohydrates (sugars such as fructose and sucrose). It also contains mineral salts and water.
(e)(i) Colour of specimen H:green.
(e)(ii) Significance of the colour: the green colour shows that the pod is unripe (immature) and still contains chlorophyll, so it is still photosynthesising and has not yet dried and turned brown ready to split and shed its seeds.
(f)(i) Type of placentation found in specimen H:marginal placentation - the ovules/seeds are borne in a single row along the fused ventral margin (suture) of the single carpel.
(f)(ii) Drawing of the two split halves of specimen H, still joined at one end, fully labelled
The pod of Pride of Barbados split into two pericarp valves that remain joined at the base, with the seeds borne in a single row along the margin of each valve (marginal placentation).
The pod splits along the two sutures into two boat-shaped valves of the pericarp (fruit wall) that remain joined at the stalk (base) end. The seeds are seen attached by short stalks (funicles) in a single row along the margin of each valve, confirming marginal placentation.
