The higher invertebrates are divided into two evolutionary lines, protostomes and deuterostomes. this division is based on which developmental feature?
a. wether the blastopore ultimately develops into a mouth or an anus

b. wether the embryonic cells undergo spiral or radial cleavage

c. wether the coelom forms by splitting the mesoderm or through the pocket of the gut.

Acar company is testing seatbelts using crash test dummies. the company finds that when cars come to a sudden stop, the crash test dummies' bodies continue to move forward. the seat belt keeps the crash test dummies from hitting the back of the seat in front of them. why do the crash test dummies' bodies continue to move forward even though the car stopped? a. the friction opposing their bodies' movement keeps them in motion. b. the inertia of their bodies keeps them in motion. c. the forward acceleration of the car keeps them in motion. d. the gravity pulling on the car keeps them in motion.

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Which are characteristics of flukes? check all that apply. a they are free living. b they are a type of flatworm. c they reproduce sexually. d they have eyespots. e they are segmented.