A is the answer for this question.
Answer:
The haploid gametes are formed by meiosis, a cellular process that involves two cell divisions and one round of DNA synthesis (i.e., four gametes with haploid DNA content). Subsequently, the gametes are fused during the fertilization to produce a diploid zygote. Finally, the zygote undergoes successive mitotic cell divisions where specific genes are expressed, this process enables the development of an embryo with different tissues and organs.
It could be that your house is too cold, or there is something in the air that makes you sick.
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The answer is A, the immune system
• Patient treatment specialization is increasing.
• Our aging population is growing and demanding better, broader health care services.
• Costs for providing, and consequently receiving, health care are increasing.