(3 marks)
(3 marks)
(3 marks)
Questions
1 Suggest what would happen to the fish...
(3 marks)
(3 marks)
(3 marks)
Questions
1 Suggest what would happen to the fish if they had no homeostatic mechanism.
2 The branchial MR cells are rich in mitochondria,
a Use information in Figure 1 to suggest the importance of the mitochondria.
b Suggest how the cell maintains a sufficient oxygen supply for the
mitochondria
3 Na /K-ATPase is a protein in the cell membrane. This protein is regulated by pH
changes. Use the information in the diagram to suggest a mechanism for
switching on the Naf/K-ATPase linked to cell surface membrane.
4 Use Figure 1 to predict the changes to the internal environment of the cell when
the Na'/K'-ATPase is active. Suggest a mechanism for maximum sodium uptake
from the water by the cell.
5 Suggest a function for the channel protein B.
6 Bafilomycin A1 is an antibiotic that specifically inhibits V-ATPase.
a What is meant by the term "specific" in this context?
b Predict how the water potential of the blood of the killifish might change in the
presence of this antibiotic.
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Answers: 3
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Identify the examples in which sam interacts only with natural resources
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Which direction does the energy flow in this energy pyramid ?
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Linda and julia are trying to determine whether their ideas are scientific or pseudoscientific. linda's idea is free of bias. julia's idea gives the same result when tested repeatedly. which statement is correct about linda and julia's idea?
Answers: 1
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