During embryonic development, a neural crest would be found in all of the following chordates, except a. cephalochordates. b. reptiles. c. birds. d. mammals.
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| During embryonic development, a neural crest would be found in all of the following chordates, except |
| a. cephalochordates. |
| b. reptiles. |
| c. birds. |
| d. mammals. |
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- The ribs form from the ________. a. notochord b. neural plate c. neural tube d. somitesAlong the notochord, segmented blocks of tissue that give rise to muscles, vertebrae, and connective tissues are calleda. neural crests.b. morulas.c. primitive streaks.d. somitesWhich of the following is common to the development of bothbirds and mammals?(A) holoblastic cleavage(B) epiblast and hypoblast(C) trophoblast(D) gray crescent
- Characteristics that evolved in birds to allow for flight includea. reptilian-like scales on the legs.b. a hard-shelled amniotic egg.c. internal fertilization.d. thin, hollow bones in the skeleton.In a developing human, the first organ to form is thea. heart.b. brain.c. notochord.d. liver.Humans have a coccyx at the end of the vertebral column. What structure common to all vertebrate embryos resulted in the coccyx? a buds b pharyngeal pouches c tail d late cleavage
- Observation of the development of embryos in sea stars shows the mesoderm forming pouches bulging from the archenteron to form the coelom. From this observation, you can predict that A. the cleavage of the embryo is radial. B. the adult animal will have bilateral symmetry. C. the mouth forms from the first opening in the gastrula. D. the animal is diploblastic.Describe the current model of neural induction in amphibian embryos.Fill in the blanks with synapomorphic, symplesiomorphic, or neither Mesoderm is a ___ feature of chordates, and a ___ feature of vertebrates, but mesectoderm (neural crest) is a ___ feature of chordates, and a __ feature of vertebrates
- What is NOT true about embryo development? A. a morula is an earlier stage than a gastrula B. Gatrulation creates endoderm and ectoderm in most animals C. Mammal blastulas are called blastocysts due to the thickened area where the embryo develops D. diploblastic animals have mesodermWhat is a potential result of injecting notochord tissue into the ventral (bottom) region of the mesoderm of a frog embryo. Group of answer choices A. a tadpole with no dorsal surface B. a tadpole with reversed legs C. a tadpole that never becomes an adult D. a tadpole with two spinal cords and brainsWhich of the following structures is unique to mammals? Question 6 options: A) Primitive meninx B) Dura mater C) Pia mater D) Secondary meninx