What are some drawbacks to using carbon 14 dating to determine the ages of fossilized organsims

This aquarium exhibits biotic and abiotic factors in an aquatic environment. one of the abiotic factors is

In pea plants, the allele for inflated pod seed, i, is dominant over the allele for constricted pod seed, i. the punnett square shows a cross for this trait. which offspring will be homozygous dominant

Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine