Senior Secondary Mastering Biology Textbook Answers

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New Senior Secondary Mastering Biology Textbook answer

Book 1A p.1/23

Suggested answers to Exercise and Reading to learn
(Note: The overseas examination boards bear no responsibilities for the suggested answers contained in this publication. Answers for HKCEE and HKALE questions are not available due to copyright restrictions.)

Ch 1 Introducing biology
Exercise
Multiple-choice questions (p. 1-15)
1 4 C B 2 5 D A 3 B

Short questions (p. 1-15)
6 Organisms can obtain food by nutrition; break down food to get energy by respiration; move; grow; sense the environment and respond to it (irritability); reproduce; remove waste from their bodies by excretion. 7 a b c d e f 8 Asking a question Proposing a hypothesis Making a prediction Doing experiments Drawing a conclusion Revising 0.5m 1m 0.5m 0.5m 1m 0.5m 1m 1m 1m 1m 1m 1m 1m 1m 1m

Some foods (e.g. cheese and yoghurt) are made with the help of microorganisms. Vaccines give us protection against certain diseases. (or other correct answers)

9

Pollution / diseases / genetically modified food / cloning (any 2 or other correct answers) 1m x 2

 Oxford University Press 2009

New Senior Secondary Mastering Biology Textbook answer

Book 1A p.2/23

Reading to learn (p. 1-16)
1 2 3 Microbes were found in nutrient solutions. Microbes fell into the solutions from the dust particles in the air. 2m 2m

Experiment 1 was the control set-up while Experiment 2 was the experimental set-up. 1m The control set-up was aimed at ensuring that the result of the experiment was due only to the presence of microbes. 1m

4

Scientific knowledge may change with the appearance of new evidence. OR The development of scientific knowledge is related to technological advancement.

2m 2m

 Oxford University Press 2009

New Senior Secondary Mastering Biology Textbook answer

Book 1A p.3/23

Ch 2 The cell as the basic unit of life
Exercise
Multiple-choice questions (p. 2-30)
1 5 9 13 B C B D 2 6 10 C A D 3 7 11 D D C 4 8 12 B B A

Short questions (p. 2-32)
14 (a) Irregular (b) cell wall (c) regular (d) cell wall (e) Absent (f) light (g) centre (h) centre of the cell 15 a b A — nucleus B — cell membrane / plasma membrane Any one from: Absorbs light energy for photosynthesis 1m 1m c Any two rows from: Plant cell - Has vacuole OR has cell sap - Has cell wall / cellulose - Stores starch OR does not store glycogen Animal cell - No / small vacuole OR no cell sap - No cell wall / cellulose OR only membrane - Does not store starch OR stores glycogen 1m x 2 Absorbs light energy to make sugar / starch / carbohydrate / organic material / food 0.5m 0.5m 0.5m 0.5m 0.5m 0.5m 0.5m 0.5m 1m 1m

 Oxford University Press 2009

New Senior Secondary Mastering Biology Textbook answer

Book 1A p.4/23

16

a

i Part of cell X Name nucleus Function contains genetic information / genetic material / DNA / chromosomes OR gives instructions to the cells / controls cell processes / activities maintains cell shape / supports cell / stops cell bursting controls entry and / or exit of molecules / substances 2m ii Plant cells A and B have a cell wall / part Y, cell C / the animal cell does not. 1m Cells A and B have a (large central) vacuole, cell C / the animal cell does not. 1m

Y Z

cell wall cell membrane

b 17 a b c d

Glucose / oxygen / sugar Cheek cells and onion epidermal cells Cheek cells, onion epidermal cells and red blood cells None of them Onion epidermal cells and xylem cells

1m

(2m for all correct answers in each part or no marks) 18 a Remove small bits from the organism and observe under the microscope. 1m

Observe whether the cells had cell walls or not. It was likely to be a plant if the cells had cell walls. 1m b i Remove small bits from different parts of the organism and observe under the microscope. 1m See whether the cells are different in size and shapes, and group together. 1m ii Organ level of organization — different tissues group...
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