Which of these pollutants is a manufactured chemical used in fire extinguishers?
a.
methane
b.
methyl chloroform
c.
carbon tetrachloride
d.
hydrofluorocarbons

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization

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

What chemical speeds up the process of decomposition in dead organisms are exposed to it? nitrogen oxygen hydrogen chlorine