Some entomologists believe that the evolutionary reason that plants expend energy to produce fall color is to warn pests. A plant that is healthy is able to produce lots of carbohydrates, and therefore more anthocyanins. Some insect pests will not lay eggs on bright colored leaves. Instead, they will find a “weaker” drab/dull colored tree on which to lay eggs. Some scientists believe that anthocyanins may act as a sunscreen to inhibit the destruction of the chlorophyll, help to prevent frost injury to leaf tissues, or limit water loss during dry spells in autumn. As far as the fall foliage watcher is concerned, their purpose is simple—they signal a last hurrah for the growing season and delight the optic nerve.

Summarize the last paragraph to explain the proposed evolutionary reasons that plants produce fall color in 30 words or less.

How do trees turn color?

In the fall, trees break down the green pigments and nutrients stored in their leaves. The nutrients are shuttled into the tree's roots for reuse in the spring. It's then that the trees take on their autumn hues. As leaves lose their chlorophyll, other pigments become visible to the human eye, according to Bryan A.

Explanation:

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.

the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.