Examlex
On a multiple choice test with four possible answers for each question, what is the probability of answering a question correctly if you make a random guess?
Biologists
Scientists who study living organisms and their interactions with each other and their environments.
Pollen
Fine to coarse powdery substance comprising pollen grains, which are male microgametophytes of seed plants, responsible for the fertilization of the female ovule.
Self-incompatibility
A mechanism in some plants that prevents self-fertilization and promotes genetic diversity by rejecting pollen from the same or genetically similar plant.
Pollen Tube
A tube that forms from a pollen grain and grows toward the ovule to enable sperm to pass directly to an egg for fertilization in plants.
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