Rating Newest Oldest. Best Answer: yes carbon dioxide is a pure substance, provided there is nothing else in it. as soon as you add some oxygen (O2) or methane (CH4) etc it is not pure. the actual molecule is CO2, one carbon and 2 oxygen atoms everytime which makes it pure. it is the same as saying pure salt. salt has sodium and chlorine in it but is still a pure substance provided nothing else is in it.
Yes, mother cats do mate with their offspring. I had cat which had become so old that my family members used to call her grandmother cat. I had once seen her mating with her offspring and THEIR offspring at different times!
A Screech Owl will find a new mate if one of the pair dies. It has been reported that male Screech Owls will on occasion form pair bonds with a second female in good habitat with abundant prey.reedingPairs of screech owls mate for life after a somewhat elaborate courtship that involves the male swiveling his head, bobbing his body up and down and winking his eyes. If the female appreciates his efforts she moves close, they touch bills, and mutual preening ensues.