Plant biology

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1.
1 point
Which of the following was a feature of the earliest land plants?
2.
1 point
In the leaves of floating aquatic plants, stomata are generally found on the:
3.
1 point
In CAM plants, stomata close during the day in response to what internal signal?
4.
1 point
Which term is used to describe Striga (witchweed) which, although possessing chlorophyll, cannot complete its life cycle without a host:
5.
1 point
The doubling in cereal yield that was achieved from 1960 to 2000 can be attributed solely to genetic improvement.
6.
1 point
During the mid-day depression of photosynthesis, stomata close to prevent:
7.
1 point
Which of the following traits is NOT likely to be found in desert plants?

8.
1 point
Tropical rain forest trees generally have deep roots for support and to capture nutrients that are leached downwards by the high rainfall
9.
1 point
Oligotrophic lakes show limited plant productivity
10.
1 point
Which of the following plant types are bryophytes?
11.
1 point
Stomata open because K+ ions are activley transported out of the guard cell
12.
1 point
Chloroplasts are located in both the palisade AND spongy mesophyll cells of leaves
13.
1 point
In general, perennial species allocate more resources to reproduction than annual species
14.
1 point
In legumes, the first site of root infection by Rhizobium is the:
15.
1 point
Plant cell expansion is driven by an increase in turgor.
16.
1 point
Which of the following is a function of the transpiration stream?
17.
1 point
Which of these cell types is a constituent of the phloem?
18.
1 point
Which of these traits is a general characteristic of living vascular plants?
19.
1 point
Physical water scarcity rather than economic water scarcity is a major constraint for plant productivity in central Africa
20.
1 point
Which of the following genera of carnivorous plants has ‘sticky surface’ traps?
21.
1 point
Which of the following is usually considered to be a micronutrient?