Which statement is true about relative dating? a) it is based on radioactive analysis. b) it is based on the half life of carbon-14 atoms. c) it is the most modern of the dating techniques. d) it is based on the position of rock layers.

Which of the following is a difference between a food chain and a food web? selected: a. food webs contain both plants and animals. food chains only contain animals.this answer is incorrect. b. food webs show energy transfer. food chains show which animal eats which animal. c. food webs separate organisms by tropic level. food chains do not. d. food webs are a complex patterns of energy flow. food chains only show one line of energy flow.

Anita thinks that she has heterozygous alleles for red hair.if she is correct, which of these diagrams best illustrates anitas alleles pf red hair

What in scientific term why the salty popcorn causes this thirst