Biology, 08.07.2019 14:30 TightKnowsDaWhey
The ancestors of modern-day fish were vertebrate chordates. vertebrate chordates are believed to have evolved from invertebrate chordates, which were similar to modern-day tunicates. what change must have occurred during the evolution from invertebrate chordates to vertebrate chordates? a. an endoskeleton evolved to enclose the spinal cord, which develops from the notochord. b. an endoskeleton evolved to enclose the dorsal nerve cord, which develops from the notochord. c. a backbone evolved to enclose the notochord, which develops from the spinal cord. d. a backbone evolved to enclose the spinal cord, which develops from the dorsal nerve cord.
Answers: 1
Biology, 22.06.2019 06:00
Will mark you as ! keiko’s teacher was discussing the theory of endosymbiosis. she asked keiko to mark the organelles in the diagram that most closely resembled prokaryotes. which organelles should keiko mark? * the first image is the question and the second image is some information to you answer the !
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Biology, 22.06.2019 12:30
What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome
Answers: 2
The ancestors of modern-day fish were vertebrate chordates. vertebrate chordates are believed to hav...
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