ambulacral grooves are present in which animals below? a. a unified skeleton b. no madreporite c. Respiratory trees d. eversible stomach e. aristotle's lantern
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ambulacral grooves are present in which animals below?
a. a unified skeleton
b. no madreporite
c. Respiratory trees
d. eversible stomach
e. aristotle's lantern
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- Figure 15.33 Which of the following statements about common features of chordates is true? a. The dorsal hollow nerve cord is part of the chordate central nervous system. b. In vertebrate fishes, the pharyngeal slits become the gills. c. Humans are not chordates because humans do not have a tail. d. Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column.A member of the protostome group of animals a. has no symmetry. b. has an anus derived from the blastopore. c. has a mouth derived from the blastopore. d. has a mouth derived from the primitive groove.What is one anatomical trait that is present in both Adapoids and Omomyoids? A. A bony ear tube B. Very large eyes C. Postorbital bar D. A large body size
- Which 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 is not a characteristic of Neanderthals? O A. A weak chin O B. Average brain size of 930 cm3 O C. Large browridges O D. A protruding midfacial areaMonotremes 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.
- Which statement comparing these organisms is correct? O A. Both animals have a skeleton. O B. Both animals have an exoskeleton. C. The crab has a skeleton, and the human has an exoskeleton. D. The crab has an exoskeleton, and the human has a skeleton.What is one trait related to locomotion that Au. sediba shares with modern humans? A. Angled femurs B. Longer arms and shorter legs C. Long and thin pelvis D. A divergent big toe (big toe sticks out)Read the list of vestigial structures found in humans. Then hypothesize apossible function for each structure and explain the reason why it is considered vestigial.Structure Possible Function Why is it considered vestigial?AppendixCoccyx (tailbone)Wisdom teeth
- According to "Our Earliest Ancestors", what is the main physical feature on Sahelanthropus tchadensis that indicates it was a biped? A.The non-divergent big toe B.The angle of the femur C.The foramen magnum D.The shape of the hipsWhich 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.What type of body symmetry does this creature have? Group of answer choices A. bilateral B. ribbitical C. none - asymmetrical D. radial