The graph shows the radioactive decay of carbon-14.

a fossil originally had 254 grams of carbon-14 but currently has 127 grams of carbon-14. the fossil is most likely

group of answer choices

5,730 years old

11,460 years old

17,190 years old

22,920 years old

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons

What was the purpose of mendel's experiments with dihybrid crosses? a. to determine if dna was a transforming factor b. to determine if traits could be recessive c. to determine if traits affected each other d. to determine if traits had more than one allele