If a pollen grain lands on the stigma of a plant of a different species: -the pollen grain would be unable to form a generative cell. -the pollen grain would be ejected from the stigma. -the pollen grain would be too large or too small to enter the stigma. -the pollen grain may not be able to germinate. -the pollen would likely not attach to the stigma.

Describe the functions of each structure within the anther (vascular bundles, parenchyma, pollen sac, anther wall, tapetum, and pollen grains) What is the similarities and differences between the anther and the male cone of the pine

Of the four parts of alteration of generations cycle (embryo/sporophyte, spore, gametophyte, gamete), which one does pollen belong to?

Choose one of the possible answers in the brackets to fill in the blank. During (simple dormancy/organic dormancy), seed only requires proper light and moisture for germination. During (simple dormancy/organic dormancy), the property of the seed prevents germination, even with light and moisture.