Which of the following experimental setups would help to determine effectivity of wind and insect pollination separately for a certain plant species?
Divide the flowers into two groups: one open to wind only, and one open to insects only.
To find the effect of one factor separately, a controlled experiment must allow only that factor to act on one set of samples while the other conditions are kept the same.
If the flowers are divided into two groups, one open only to wind (for example, covered with a fine mesh that lets airborne pollen through but keeps insects out) and one open only to insects, then the seed or fruit set in each group shows how effective each type of pollination is on its own. Comparing the two groups separates the contribution of wind from that of insects.
Removing the stigmas or covering all flowers completely stops pollination altogether, so neither agent can be measured. Exposing all flowers to both wind and insects at the same time mixes the two effects, so their separate effectivity cannot be found.
Hence, Divide the flowers into two groups: one open to wind only, and one open to insects only.
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Important Questions from Reproduction
Cells of the tapetum possess dense cytoplasm and generally have ________.
Human chorionic gonadotropin:
Zygotes do not undergo reduction division immediately. They produce a multicellular body called a -
Which of the following organisms does NOT show asexual reproduction by means of fission?
The pollen needs to be transferred from the stamen to the stigma. If this transfer of pollen occurs in the same flower, it is referred to as __________ . On the other hand, if the pollen is transferred from one flower to another, it is known as ______
