Explain why scientists think that life on earth began after 3.9 bya

Do scientists know what gravity is?

During which stage of postmortem decomposition does the body lack moisture? A) putrefaction B) dry decay C) black putrefaction D) initial decay

What is a ball of hydrogen and helium that makes light

Which of the following is true about the genetic code? A. It is universal among all life on Earth. B. It codes for chains of triglycerides. C. It is unique to humans. D. It is universal among animals.

What is a community of living things together with their environment called? A. retrosystem B. ecosystem C. exosphere D. biosphere

The energy usage per capita in Africa and Asia have grown tremendously the last 50 years. Which of these would be a good explanation of why the energy use off these continents has grown more quickly over this time period when compared to North

Describe what happens during the regeneration stage of the calvin cycle

Почему при нехватке кислорода человек может погибнуть? Кратко!

The small organs of equilibrium in scyphozoan jellyfishes are called

The study of the eating habits of grizzly bears is in which field of biology