8 LIFE SCIENCES P2
EC/NOVEMBER 2017)
SECTION B
MA
QUESTION 2
2.1
Study the ecosystem below and answer the questions which follow.
fox
weasel
hawk
thrush
mouse
squirrel
rabbit
caterpillar
shrubs
grass
mushrooms
(www. phinglink. com]
2.1.1
From the food web above name:
(a)
ONE producer
(2)
(b)
TWO secondary consumers
2.1.2
Use a food chain from the above ecosystem to draw a fully labelled
pyramid of energy with FOUR trophic levels.
(7)
2.1.3
What would happen if all the weasels were removed from the
ecosystem?
(2)
TOOT
10​

Transmission electron microscope are best for viewing a) microorganisms in pond water b) internal organs of a mouse c)internal structures of a cell d) surface features of a specimen

Look at the photo of the leaf. which term best describes this leaf?

Awoman whose sister tested positive for a specific mutation in the brca1 gene, which increases the risk for breast and ovarian cancer, is found not to have that mutation but does have a mutation of unknown significance near the known mutation site. how should this woman be counseled? select one: a. she should be informed that her risk for breast cancer is greater than the general population but not as great as her sister’s risk. b. she should be informed that because she does not have the mutation, her risk for breast cancer is not greater than that of the general population. c. she should be informed of her gene mutation status and be presented with all the available prophylaxis options and reconstruction options. d. she should be informed that she does not have the specific mutation but that because another mutation is present she should be vigilant about screening