What are two ways to determine a fossil's age

What causes an unsaturated fatty acid to have a different shape than a saturated fatty acid? o a. unsaturated fatty acids have more hydrogen atoms. o b. unsaturated fatty acids have double carbon bonds. o c. unsaturated fatty acids have more nitrogen atoms. o d. unsaturated fatty acids have single carbon bonds.

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%