Throughout the young larval stages a small gland behind the brain, called the corpus allatum, secretes juvenile hormone (also known as neotenin).
Pigments absorb light used in photosynthesis.Set of wavelengths that a pigment doesn't absorb are reflected.
Food was cooked, quickly frozen, and then dehydrated in a special vacuum chamber. Freeze-dried food didn't need to be refrigerated and would last a long time. To make most freeze-dried foods, astronauts squeeze water into the food packages and then eat the food after it absorbs the water.
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Explanation: https://en.wikipedia.org/wiki/Evolution_of_the_horse