Question

12. Which of the following is not a characteristic of Mollusks? a. three main body parts: head, trunk and tail b. a true coelom c. separate sexes in most species d. usually a shell produced by the mantle e. feeding with a rasping organ called a radula 23 CA 24сАз с 25 CA 26 cAコ 27 CA 28 CA 30 13. Which of the following adaptations allowed reptiles to complete their life cycles on land? a. lungs b. endothermic metabolism c. an amniotic egg d. four legs e pack behavior Which of the following statements about mammals is false? a. b. c. d. e. 14. Mammals evolved from reptiles Some mammals lay eggs Mammals have mammary glands Mammals have hair Like birds, mammals are ectothermic 15. Which of the following is not a characteristic of cnidarians? a. Cnidarians have three true tissue layers b. The digestive compartment of cnidarians is called the gastrovascular cavity c. The more stationary cnidarian body type, which is cylindrical with a ring of tentacles, is the polyp d. The cnidarian body type that is able to move freely in the water is a medusa Cnidarians are named for their special stinging cells e. Animals that are segmented, have jointed appendages and an exoskeleton are: a. Platyhelminthes b. Molluska c. Annelida d. Cnidarian e. Arthropoda 16.

Answer 1

12. A) Three body parts, head, trunk and tail.

Reason: They have Head, foot and visceral mass.

13 a) Lungs

Reason: Lungs are important for respiration on land

14 e) Like birds, mammals are ectothermic.

Reason: Mammals are endothermic animals

15 a) Three tissue layers

Reason: they have only two layers.

16 e) Arthropoda

Reason: it is their characteristic