This scientist placed a lit candle and a plant under a transparent jar. After a while the candle went out. He left the candle and plant under the jar and tried to relight it after a while with a magnifying glass and the sun. It relit. He concluded that plants somehow change the composition of the air. Who was this scientist?
Jan van Helmont
Jan Ingenhousz
John Woodward
Joseph Priestly

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.

The sketch shows a rynchosaur, an extinct animal that is known only from fossils. there has been much debate about the classification of these creatures. some scientists suggest that they belong with primitive amphibians, and some think they are related to snakes and lizards.the data equally support both cases. which statement best explains how to draw a cladogram that includes the rynchosaur? draw the cladogram for amphibians. draw the cladogram for reptiles. draw two cladograms, both showing the traits, and leave it as a hypothesis. draw two cladograms, both showing the traits, and have scientists vote

The first generation of offspring from the cross of two parents is called the a.f1 generation b.f2 generation c.short generation d.p generation