A concern, "many snails are hermaphrodite", meaning some other few snails are not. How is this phenomenon?!

<h2>Sexual Reproduction</h2>
<p>Sexual <a data-lesson="reproduction-3" data-subject="biology" data-tutorial="fungi" href="https://app.ulearngo.com/biology/fungi/reproduction-3">reproduction</a> is the combination of (usually haploid) reproductive cells from two individuals to form a third (usually diploid) unique offspring. Sexual reproduction produces <a data-lesson="reproduction-methods" data-subject="biology" data-tutorial="reproductive-system" href="https://app.ulearngo.com/biology/reproductive-system/reproduction-methods">offspring</a> with novel combinations of genes. This can be an <a data-lesson="introducing-adaptive-immune-response" data-subject="biology" data-tutorial="immune-system" href="https://app.ulearngo.com/biology/immune-system/introducing-adaptive-immune-response">adaptive</a> advantage in unstable or unpredictable environments. As humans, we are used to thinking of animals as having two separate sexes—male and female—determined at conception. However, in the animal kingdom, there are many variations on this theme.</p>
<h2>Hermaphroditism</h2>
<p><strong>Hermaphroditism</strong> occurs in animals where one individual has both male and female reproductive parts. Invertebrates such as earthworms, slugs, tapeworms and snails, shown in the figure below, are often hermaphroditic. Hermaphrodites may self-fertilize or may mate with another of their species, fertilizing each other and both producing offspring. Self <a data-lesson="fertilization" data-subject="biology" data-tutorial="reproductive-system" href="https://app.ulearngo.com/biology/reproductive-system/fertilization">fertilization</a> is common in animals that have limited mobility or are not motile, such as barnacles and clams.</p>
<div class="wp-caption alignnone" style="width: 544px"><img alt="Photo shows a land snail." height="408" src="https://data.ulearngo.com/assets/2dc07024-c146-4870-b63a-4195d94ab2ac" width="544"/><p class="wp-caption-text">Many snails are hermaphrodites. When two individuals mate, they can produce up to one hundred eggs each. (credit: Assaf Shtilman)</p></div>

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Sexual Reproduction

Biology studies life and living organisms. Biology can be divided into different sections that cover the morphology, physiology, anatomy, behavior, and so on of living organisms.

Biology

Explore the fascinating and complex process of animal reproduction, including asexual and sexual reproduction, sex determination, hormonal control, human reproductive anatomy and pregnancy, fertilization and early embryonic development, organogenesis and vertebrate axis formation.


Sexual Reproduction

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