Which structure fuses to form a diploid zygote during sexual reproduction?

The correct answer is male (+) haploid cell and female (-) haploid cell fuse to form a diploid zygote during sexual reproduction.

Explanation:

Sexual reproduction is the process that involves two processes- first is meiosis, involves the division of the number of chromosomes to half, and fertilization, the process of the fusion of two gametes or haploid cells and the maintaining or restoring of the original number of chromosomes.

In sexual reproduction, the specialized haploid cells or gametes from two different individuals, termed as the (+) and (−) mating types, join to form a diploid zygote.

thus, the correct answer is male (+) haploid cell and female (-) haploid cell.

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.

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.