Which of these choices describes a zygote? a structure or organ within an organism that produces gametes
a specialized cell that contains half the number of chromosomes found in the other cells
of an organism
a spore-like cell that is produced during asexuals reproduction and that can grow into a
new organism
a cell that forms as the result of fertilization and has the same number of chromosomes as the parent cells

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image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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