Choose all the answers that apply. which of the following minerals can be scratched with a fingernail?
-talc
-diamond
-topaz
-quartz

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger

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 cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million