The list below shows some events which took place at different periods in the geologic time scale. 1. fish with craniums appear. 2. mammals appear. 3. sharks appear. which of these best orders the events from the earliest to the most recent? select one: a. 1, 2, 3 b. 1, 3, 2 c. 2, 1, 3 d. 2, 3, 1

Which of the following is a main difference in cell structure between an onion cell and a human cheek cell? a. an onion cell contains one nucleus, whereas a human cheek cell contains two nuclei. b. an onion cell has a cell wall. c. a human cheek cell contains chloroplasts. d. there is no difference between an onion cell and a human cheek cell. you for your.

2. if someone had the list of traits you provided in question 1, do you think he or she would be able to find you in a group of 1000 people? why or why not? if not, what other information encoded in your genes might distinguish you from the others in the group? what are other traits that are encoded for by dna?

What type of appendages do sponges cnidarians roundworms annelids mollusks arthropods echinoderms and vertebrate have? jointed, not jointed, absent