Afew fossils of the earliest animals exist because

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.

Each trait of a plant is determined a. an allele b. one gene c. a pair of genes d. one dominant gene

What did hunter gathers do to alter the environment?