Charles and Francis Darwin concluded from their experiments on phototropism by grass seedlings that the part of the seedling that detects the direction of light is the

A flash of red light followed by a flash of far-red light given during the middle of the night to a short-day plant will likely

In the process of alternation of generations, the ________.

Which of the following would be considered a aggregate fruit?

Which of the following correctly pairs a flower part with its function?

Palisade parenchyma, a ground tissue, performs which of the following functions?

What adaptations should one expect of the seed coats of angiosperm species whose seeds are dispersed by frugivorous (fruit-eating) animals, as opposed to angiosperm species whose seeds are dispersed by other means?1. The exterior of the seed coat should have barbs or hooks.2. The seed coat should contain secondary compounds that irritate the lining of the animal’s mouth.3. The seed coat should be able to withstand low pHs.4. The seed coat, upon its complete digestion, should provide vitamins or nutrients to animals.5. The seed coat should be resistant to the animals’ digestive enzymes.

Which of the following is the part of a flower that contains the male gametophyte?

Fruits develop from ________.

What ligament is indicated?