10. Radioactive isotopes in fossils decay at a constant rate. The ratio of radioactive isotope to
or the rock it was found
in. This is an example of
dating.
stable isotope can be examined to estimate the age of the fossil
• A. absolute
• B. magnetic
• C. relative
A
O D. Precambrian

it's c. (to reduce the greenhouse effect/carbon gasses)

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

c is the correct answer!

wild parsnip is a perennial plant which reproduces rapidly in areas which have no sign of agricultural activity such roadside or at no tillage open areas. it's considered invasive because it can inhibit the growth of another plant  and its reproduction is fast. there are several harmful effects of this invasive plant although its taproot is edible since it is a member of the carrot family. wild parsnips can cause skin blistering when in contact because of the chemicals it contains, second it inhibits the growth of other plants, it will restrict the growth of animals when eaten and lastly, it drives away natural pollinators like bees.