Which of the following conditions characterizes atmosphere ill?
-nitrogen-rich and oxygen-poor
- hydrogen- and helium-rich
-nitrogen- and oxygen-rich
-water vapor- and carbon dioxide-rich

What re the two main phrases of the cell cycle.

In what part of a chloroplast does glucose production occur? a. atp synthase b. photosystem ii c. photosystem d. stroma

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