By Julie Kerr Casper PhD
Throughout the process thousands of years, animals have tailored to varied environments in the world. even if animals have developed over geologic time to Earth's continuously altering environments, and even supposing the extinctions of definite species are basic, in no different time within the planet's heritage has the extinction price climbed as excessive because it is at the present time. reasons of this remarkable extinction price comprise destruction of flora and fauna habitat, pollutants, overfishing, and poaching. "Animals" illustrates those pressing concerns in a fashion available to center and highschool readers.
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Extra info for Animals: Creatures That Roam the Planet (Natural Resources)
If the consumer is caught and eaten, its fat is digested, and the pollutant moves to the fat of the new consumer, and so on. In this way, the pollutant builds up in the fatty tissues of the consumers. One of the most well-known examples of biomagnification is the use of DDT. DDT is a pesticide, and its use has improved human health in many countries by killing insects, such as disease-spreading mosquitoes. One of the reasons DDT was thought to make a good pesticide is that it doesn’t break down in the environment, but because of this, it is ingested by organisms and stored in their fat.
It then outlines animal distributions over time and reasons why some species exist only in specific places. Finally, this chapter addresses recent extinctions and the role humans have played in them. Learning From the Fossil Record Many scientists, such as paleontologists (scientists that study life from past geological periods), geologists (scientists who study the history, formation, and processes of the Earth), and biologists (scientists who 23 24 animals study plant and animal life and their associated processes), use the fossil record to learn about the past history of the Earth.
Learning From the Fossil Record Many scientists, such as paleontologists (scientists that study life from past geological periods), geologists (scientists who study the history, formation, and processes of the Earth), and biologists (scientists who 23 24 animals study plant and animal life and their associated processes), use the fossil record to learn about the past history of the Earth. Learning about the past helps scientists have a better understanding of the geologic processes that continue today, past and present biodiversity, species origination and extinction, past and present climates, ocean processes, and atmospheric changes.
Animals: Creatures That Roam the Planet (Natural Resources) by Julie Kerr Casper PhD