The penis delivers sperm<span> through the urethra. The two testicles (or testes) produce</span>sperm<span> and the male sex hormone testosterone. Nest to each testicle, the epididymis is a light‑colored tube where </span>sperm<span> is stored. ... In the human </span>reproductive<span> process, two kinds of sex cells, or gametes, are involved.
Though i must say, this is quite inapprrporiate.
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B. Subgroups
<span>When constructing a dichotomous key, the first step is to look at the group of objects or organisms and separate them into two groups based on a single distinguishing characteristic. Then continue to separate each of the groups until each object has its own separate set of characteristics.</span>
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