TEST OF PRACTICAL KNOWLEDGE QUESTION 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 a...

TEST OF PRACTICAL KNOWLEDGE QUESTION

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:

(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.

(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.

Answer Details

1.

(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:

(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.

(ii) 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