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A characteristic unique to most species of mammals and no other vertebrates is
a. endothermy.
b. skin covering for insulation and protection from dehydration.
c. hair.
d. a notochord
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- One of the innovations in animal body design, segmentation, allowed fora. development of efficient internal organ systems.b. more flexible movement as individual segments can move independently of each other.c. locating organs in different areas of the body.d. early determination of embryonic cellsWhich of these is not characteristic of all vertebrates?a. complete digestive systemb. closed circulatory systemc. skin with either scales or feathersd. endoskeleton made of bone or cartilagee. vertebral columnWhich of the following statements about bilaterian animals is false? A. Many bilaterians are invertebrates but some are not. B. All bilaterians are triploblastic (have three germ layers). C. All bilaterians have bilateral symmetry. D. Most bilaterians have tissues but some do not.
- A major difference between birds and other reptiles is that birdsa. produce a shelled egg. d. care for their young.b. are ectotherms. e. have air sacs.c. are tetrapods.Mammals are distinguished from other animals based ona. size and hair type.b. mode of reproduction.c. number of limbs and method of caring for young.d. number of mammary glands and number of offspring.Monotremes are very primitive mammals because: O a. They lay eggs. O b. They do not provide milk to their young. Oc. They breathe using gills. O d. They have a cartilaginous skeleton. O e. They have no lower jaw.
- Unlike bony fishes, amphibians havea. ears. b. jaws. c. a circulatory system.d. a heart.The function of the amphibian larval stage is to allowa. extended development of the muscular-skeletal system.b. food gathering over an extended period.c. escape from predation.d. prevention of metamorphosis.Which of the following adaptations is only found in mammals and not other vertebrates: O a. Havinga complete double circulation of the blood. O b. Havinga heat insulating layer of fat under the skin. O c. Having lungs enclosed in a rib cage. O d. Having colour vision. O e. Generating heat by shivering.
- Segmentation, first seen in annelids, allows evolutionary advantages bya. allowing more fluid movement for less energy expense.b. specialization of segments to carry out different functions.c. allowing coelom development.d. concentrating sensory and nervous tissues and organs in the direction of motion.The formation of the neural plate is induced by the ….? Group of answer choices a. notochord b. teeth c. neural tube d. neural crest e. archenteronThe epitheliomuscular cells found in cnidarians anticipate the muscular system of more complex animals. The absence of muscle tissue in cnidarians primarily reflects... A. The fact that cnidarians are basal metazoans, having specialised cells but lacking tissues B. The presence of only two germ layers, ectoderm and endoderm, in cnidarian embryos C. The fact that cnidarians lack a nervous system D. The sessile lifestyle observed in all cnidarians E. All of the above explain the absence of muscle tissue in cnidarians