The rate of mitotic division that takes place between the 4-cells stage and the morula, is 12 hours per cell division. The first division occurs in about a day after fertilization, and subsequent divisions occur every 12 to 24 hours after that. The zygote divides several times to form a mass of cells called morula, which is an embryonic stage consisting of a solid, compact mass of 16 or more cells.
Option C : oxygen and Option B: nutrients
A<span>nother nutrient, fat, stores energy. Before your body can use these nutrients, they must be broken into smaller substances. is the </span>process<span> of </span>breaking down food<span> into usable materials. Your digestive system transforms the energy and materials in </span>food<span>into forms your body can use.</span>
Answer:
a
Explanation:
the other two you dont know if everyone will see it
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Species abundance is the number of individuals per species, and relative abundance refers to the evenness of distribution of individuals among species in a community. Two communities may be equally rich in species but differ in relative abundance
