Examlex
According to the Focus on Neuroscience box: The Addicted Brain, heroin, cocaine, amphetamines, alcohol, and nicotine all affect levels of which of the following neurotransmitters?
Pollen Tube
In seed plants, a tube that forms when a pollen grain lands on the stigma and germinates. The tube grows, passing between the cells of the stigma and the style to reach the egg inside an ovule, where fertilization occurs.
Foreign Species
Species that are introduced to a new habitat where they are not naturally found, often leading to ecological imbalance.
Floral Parts
Components of a flower, including petals, sepals, stamens, and carpels, which are involved in reproduction.
Monocots
A group of flowering plants (angiosperms) recognized by having one seed leaf, or cotyledon, among other characteristics like parallel leaf venation.
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