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Many fish in the ocean are broadcasters — male and female release sperm and
eggs simultaneously in the open water and allow them to take their chances.
Nest-building gives the egg and sperm a greater chance of encountering one ...
Although the appearance of the first marine animal on the beach so many
millions of years ago is noteworthy, in a manner no less dramatic other species
still leave the relative safety of the sea to deposit their eggs on shore. Born with
Although they spend their entire lives in the ocean, sea turtles return to sandy
beaches to lay their eggs. Air-breathing, they are one of the sea's few reptiles
whose shelled egg and watertight skin make them ideally suited for terrestrial life.
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I purchased all three books in this set and taught a short course to a small group of high school kids. We had a great time with this course! We did 10 experiments and held very intense all-day ... Read full review