There are two basic life-cycle patterns among animals. Many animals have complex life cycles with two or more very distinct stages; metamorphosis is the usual term for the often-radical changes ...

"Scientists discover the evolutionary secret behind different animal life cycles." ScienceDaily. ScienceDaily, 27 January 2023. <www.sciencedaily.com / releases / 2023 / 01 / 230125121546.htm>.

Some animals, such as the turquoise killifish (a small fish that can complete its life cycle in 14 days) grow fast and die young, while others, like the Greenland shark, (a fish that glides around ...

For over 100 years, biologists have wondered why animals display different types of life cycles. Some species, like us humans and most vertebrates, develop directly into a fully formed—yet ...