Page 251 - SUBSEC October 2017_Neat

- 6 -
02207032/CAPE/SPEC/KMS 2017

CAPE BIOLOGY

UNIT 2 -- PAPER 032

MARK SCHEME

4 marks from Histogram + 2 marks from graph = 6 marks

UK XS
Question 3. (continued)

(b)  Babies of 6 – 7 lbs (which constitute 18% of births) have
the lowest mortality (2.5 and 1.5%).

 Babies of 3 – 4 lbs have the highest percentage mortality
of 90%.

 Babies of 11 lbs also show high % mortality of 15%.

3 correct points, using data from the table - 3 marks 3

(c)  The next generation would receive more genes associated
with mean birth-weight.

 Fewer genes for very low, or high birth-weight would be
passed to the next generation.

One correct point – 1 mark 1

(d) Directional

Correct – 1 mark 1

(e) (i) & (ii)

Labelled and correctly
placed graphs -- 1 mark each 2