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Which of the following was a feature of the earliest land plants?
In the leaves of floating aquatic plants, stomata are generally found on the:
upper and lower surfaces
In CAM plants, stomata close during the day in response to what internal signal?
Which term is used to describe Striga (witchweed) which, although possessing chlorophyll, cannot complete its life cycle without a host:
The doubling in cereal yield that was achieved from 1960 to 2000 can be attributed solely to genetic improvement.
During the mid-day depression of photosynthesis, stomata close to prevent:
Which of the following traits is NOT likely to be found in desert plants?
Ephemeral (short-lived) flowers
Tropical rain forest trees generally have deep roots for support and to capture nutrients that are leached downwards by the high rainfall
Oligotrophic lakes show limited plant productivity
Which of the following plant types are bryophytes?
Stomata open because K+ ions are activley transported out of the guard cell
Chloroplasts are located in both the palisade AND spongy mesophyll cells of leaves
In general, perennial species allocate more resources to reproduction than annual species
In legumes, the first site of root infection by Rhizobium is the:
Plant cell expansion is driven by an increase in turgor.
Which of the following is a function of the transpiration stream?
Transport of sugars
Transport of amino acids
Transport of nutrients
Which of these cell types is a constituent of the phloem?
Which of these traits is a general characteristic of living vascular plants?
Differentiated vascular tissues (xylem and phloem)
Life cycle with dominant gametophyte
Uptake of water by the capillary action of leaves
Physical water scarcity rather than economic water scarcity is a major constraint for plant productivity in central Africa
Which of the following genera of carnivorous plants has ‘sticky surface’ traps?
Which of the following is usually considered to be a micronutrient?
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