Animals commonly called reptiles, amphibians, birds, and mammals are all tetrapods-a term that means "four feet". The transition from water to land is fascinating to scientists in part because it is our history-the transition documents the evolution of tetrapods and humans are tetrapods. Tetrapods form a clade. Which of the following is true for tetrapods

Animals commonly called reptiles, amphibians, birds, and mammals are all tetrapods-a term that means "four feet".

Explanation: Tetrapods are a group of vertebrates that namely;

1. amphibians

2. reptiles

3. birds

4. mammals.

Tetrapods are made up of all living land vertebrates, and some vertebrates who once lived on land. Such vertebrates have adapted to live in seas and oceans Examples of such vertebrates are

1. whales

2. dolphins

3. seals

4. sea turtles and many more

One of the key features of tetrapods is that they have four limbs or, their ancestors had four limbs. Are known as tetrapods

the answer to your question is b

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."