1. Study Specimens B, C and D and answer questions 1(a) To 1(f).
(a) i) Place two drops of specimen B on a white tile and add two drops of iodine solution.
Complete the table below with the test, observation and inference:
|
test |
observation |
inference |
(aii) Put 5 ml of specimen B into a test tube and add 2 ml of sodium hydroxide solution followed by three drops of copper (ii) tetraoxosulphate (VI) solution and shake Complete the table below with the test, observation and inference.
|
test |
observation |
inference |
(b) Give the name of each of the tests in 1(a)i) and 1(a)(ii). (i) ____________ (ii) _____________
(c) State two ways by which specimen C is of economic importance.
(d)(i) Name the Kingdom to (1) (ii) which specimen C belongs. (ii) State three reasons for the. answer in 1(d)(i). (iii) Name four other organisms that belong to the same Kingdom as specimen C.
(ei) Name the Phylum to which specimen D belongs. (ii) State three reasons for the answer in 1(d)(i).
(f)(i) Explain briefly the role of specimen C in nutrient cycling. (ii) What is the mode of nutrition of specimen C.
Explanation
1.Study Specimens B, C and D and answer questions
(a)(i) Place two drops of specimen B on a white tile and add two drops of iodine solution.
Complete table below with the test, observation and inference:
|
Test |
Inference |
Observation |
|
Two drops of iodine solution was added to two drops of Specimen B on a (white tile) |
Brown/Yellow color remains unchanged/no (visible) |
Starch absent |
|
Test |
Observation |
Inference |
|
5mls of specimen B was put into a test tube +2mls of sodium hydroxide solution+ three drops of copper (ii) tetraoxosulphate (VI) solution and it was shaken |
Violet/Purple color formed |
Protein present |
(b) (b) Name of Test: (i) lodine test/test for starch (II) Biuret test/test for protein.
(c) Economic Importance of Specimen C/Mushroom:- -Facilitates nutrient cycling. -Facilitates decay. -Used as -Source of income/employment. -Manufacture of drugs. food/source of food
(d)(i) Kingdom of Specimen C: Fungi/Mycota:
(ii) Reason for Kingdom of Specimen C: -Lacks chlorophyll. -Is filamentous. -Reproduces (asexually) by spores/conjugation. -Has hyphae/mycelium. of cellulose cell wall/chitin/glucans/protein. -Saprophytic/heterotrophic nutrition.
(iii) Other organisms that belong to the Kingdom of Specimen C: Mucor/Mould: -Aspergillus; - Yeast; -Rhizopus; toadstool;-Puffball: -Puccinia/black rust/rust; -Smut;-Penicillium; -Bracket fungus;-Pythium fungus.
(e)(i) Phylum of Specimen D/Giant Land Snail: Mollusca. (i) Reason for Phylum of Specimen D: -Has shell; -Has tentacles; -Body divided into head, Viscera hump and muscular foot; muscular foot;-Has a mantle/mantel.
(f) Role of Specimen C in Nutrient Cycling: -They are decomposers; -They release nutrients into the soil;-Which plants absorb for growth;-Herbivore feed on plants.
(ii) Mode of nutrition of Specimen C: Saprophytic