Hello everyone im struggling with this question so if you know anything about biotechnology please help me ;)

The sperm retrieval procedure used in IVF collects only a few sperm cell. So, explain why only a few sperm cells can still result in an embryo being produced.

When does a spring tide occur? question 9 options: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall. they occur on the date of the vernal equinox each year, no matter what stage the moon is in. this is why they are called spring tides. they occur when the sun, moon, and earth are at 45-degree angles from each other. this happens once every spring. they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur all year long.