Which animal is one of only two mammals that lay eggs?

three-toed sloth

duck-billed platypus

wombat

chicken

Twind is considered to be an abiotic factor because it.?

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone