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!
Snapping turtles mate between April and November, and are most active in breeding during warmer months. They begin courtship by facing one another and moving their heads from side to side. Mating begins with the male mounting the female and adjusting his tail beneath the female's to allow the cloacal openings to touch. A female snapping turtle may keep viable sperm in her body for several years, so that eggs are fertilized even in years when she does not mate.