By looking at a plant, how can you tell if it is a cycad and not a palm?

How does the molecular clock work? a. it analyzes the brain functionality of two different species.b. it examines and compares the physical characteristics of two different species.c. it illustrates relationships between two different species.d. it compares the number of mutations that exist in the dna of two different species.

What pattern of migration do whales follow?

What drives an advertising campaign?