1.In some plants (like lilies), all four megaspores survive. Three megaspores fuse into a single nucleus while one megaspore remains solitary. Then both of these nuclei go through two mitotic cell divisions to form the typical eight nucleus megagametophyte. One nucleus from each group join to form the polar cells. After fertilization by a sperm, what would the ploidy of the endosperm of a lily be

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

silt loam

hope this

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