Scientists believe that early plants released oxygen in a process called photosynthesis. where did the carbon dioxide needed for photosynthesis come from in the early atmosphere?

What main process in meiosis ensures genetic variation in the offspring

What does the Hokkaido ken dog eat?

In 1928 Frederick Griffith conducted an experiment in which he injected mice with different kinds of bacteria when bacteria that cause disease (pathogenic) were injected in healthy mice, these mice got sick and died.

Which ecological inquiry method is an ecologist using when here she sets up a greenhouse and measures the affects of different levels of carbon dioxide on an endangered plants species? A: questioning B: observing C: experimenting D: modeling

Which of the following evidence statements would be supported by the two models

Sharks and their relatives are the first group of animals with jaws. why are jaws a significant evoluntionary development

True (bubble A) or False (bubble B) : Mutations caused by UV light will favor mutations that cause changes to protect the cell from UV light

Cartilage is part of the skeletal system. True False

Which is made up of organic molecules? copper electrical wires plastic storage containers table salt antacid

How does nitrogen leave a food chain? A. Primary consumers eat nitrogen-containing green plants. B. Producers absorb nitrogen-containing nutrients by their roots. C. Decomposers break down nitrogen-containing waste material from primary consumers. D.