6.2. Leaf structure
A subsection of Biology, 5090, through 6. Plant nutrition
Listing 10 of 54 questions
Use shows two microscopic structures that are adapted for absorption, one from an animal and the other from a plant. The structures are not drawn to the same magnification. structure D structure E State one feature that these two structures have in common that helps them to carry out their function. Identify each structure and, for each one, name two chemical substances that are absorbed by it. structure D: name chemical substance 1. 2. structure E: name chemical substance 1. 2. Examiner’s Use Structure E in is a single cell. Draw in and label, on , a feature that helps the cell to carry out absorption. Explain how the feature you have drawn and labelled helps the cell to carry out absorption.
5090_s07_qp_2
THEORY
2007
Paper 2, Variant 0
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a shows the absorption and release of gases by an animal and by a leaf of a plant during the day. A B a Name gas A, gas B. On b, place arrow heads on the four lines to indicate the movement of the same gases during the hours of darkness. A B b Explain why, in the early morning and in the evening, there is no overall movement of gases into or out of the leaf. The animal eats the leaf. Name a chemical substance in the leaf that will provide the animal with energy, the animal will use for growth.
5090_s08_qp_2
THEORY
2008
Paper 2, Variant 0
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shows a section through a microscopic, one-celled organism often found growing on the bark of trees. cell wall chloroplast nucleus E Suggest the identity of the region labelled E in . List the structures visible in which suggest that this organism might be a plant. List the ways in which this cell differs from a palisade cell in a plant leaf. shows the same cell reproducing. Fig 5.2 Explain why successive generations of this organism have remained unchanged in appearance for many thousands of years.
5090_s10_qp_22
THEORY
2010
Paper 2, Variant 2
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Questions Discovered
54