The development factored into the development of complex organisms.

ozone
oxygen
cyanobacteria
all of the above

the end of the paleozoic era was signaled

the development of humans
mass extinction of land and sea animals
the development of organisms with hard parts
both a and b

reptiles evolved from an ancestor of amphibians that developed a(

egg with a strong outer shell that kept it from drying out
hard set of teeth
thick eyelid
long tail

question: which statement best describes the different properties of metals?

answer: they are shiny and bend without breaking.

since metals have certain characteristics properties, they include the following: they are ductile, malleable, shiny, hard, lustrous, flexible and they are good conductor of heat and electricity. so therefore, metals are not dull and they are not non-flexible as listed. instead, they are shiny and flexible.

hope this , have a good day. c;