During the process of fertilization, which step happens first? a. the sperm's nucleus enters the egg cell. b. enzymes break down the protective layer of the egg cell membrane. c. a sperm attaches to a binding site on the egg cell membrane. d. the cell membrane of the egg cell changes. e. the sperm looses its tail.

Answer asap 50 points which of the following distinguishes the soil composition of grassland? 1. the soil supports large trees with thick, long roots, so horizon b needs to be deep enough to sustain larger flora. 2. the soil supports large trees with thick, long roots, so horizon a needs to be deep enough to sustain larger flora. 3. the soil supports small plants and shrubs with short roots, so horizon a needs to be deep enough to sustain smaller flora. 4. the soil supports small plants and shrubs with short roots, so horizon b needs to be deep enough to sustain smaller flora.