True or false carbon-15 and nitrogen-15 are isotopes of each other

Define dew point. i am writing this part to be able to ask the question

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils. the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

Draw the structure for 5-isopropyl-2-methyl-3-nonene