By stretching every day to become more flexible
Answer:
A: The sperm penetrates the egg membrane,and they fuse together.
Explanation:
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D. Use a condom during every sexual encounter
Answer:
Target heart rate is generally expressed as a percentage (usually between 50 percent and 85 percent) of your maximum safe heart rate. The maximum rate is based on your age, as subtracted from 220. At an 85 percent level of exertion, your target would be 145 beats per minute.
