WebThe mathematical expression that relates radioactive decay to geologic time is called the age equation and is: t=1/delta ln (1 + D/P) where: t is the age of a rock or mineral specimen, D is the number of atoms of a daughter product today, P is the number of atoms of the parent product today, ln s the natural logarithm (logarithm to base e), and. WebOct 6, 2024 · The answer is that hundreds of millions of years ago, vertebrates were far from the dominant life forms in the earth's oceans, and these early fish needed a means of …

Devonian Period and Prehistoric Information National Geographic

WebThe first fish lineages belong to the Agnatha, or jawless fish. Early examples include Haikouichthys. During the late Cambrian, eel-like jawless fish called the conodonts, and … WebFin fish like salmon have gills, are covered in scales, and reproduce by laying eggs. Eels, by contrast, have worm-like bodies and exceedingly slimy skin. Lungfish gulp air. Whale … daft punk cloak wallpaper

21. Fish________ on earth for ages and ages. a. existed b. are

WebJul 2, 2024 · This tells them the age of the fish. The process is similar to determining the age of a tree. Scientists count tree rings to determine the tree’s life span; they count otolith … WebFish are a kind of animal that lives in water. Fish have lived on Earth for more than 450 million years. There are more than 24,000 species, or kinds, of fish. New ones are discovered every year. Related Articles - fish - Kids Britannica Kids Homework Help Some animals have special colors or markings called protective coloration. … Countless tiny living things float and drift in the world’s oceans and other bodies of … Plants and animals have special characteristics, or traits, that help them … WebJun 7, 2024 · Fish_____ on earth for ages and ages. a. existed. b. are existing. c. exist. d. have existed. Theo dõi Vi phạm Trả lời (1) d. have existed. for ages and ages: dấu hiệu … daft punk cause of death