Which organism has cerebral ganglia in its head connected to ladder-like arrangements of nerve fibers? flatworm

seahorse

spider

frog

Study the diagram of a desert food chain . what would most likely happen if the kangaroo rats were killed off and removed from the food chain ?

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?