Answer:
Cell division becomes uncontrolled when mutations occur in genes that regulate cell division.
Explanation:
Answer:
The correct answer is option B, that is, an endoskeleton evolved to enclose the dorsal nerve cord, which develops from the notochord.
Explanation:
It has been discovered that the ancestors of the modern-day fish were vertebrate chordates. The vertebrate chordates are considered to have evolved from the invertebrate chordates that are identical to the present day tunicates. It has been found that in vertebrates the endoskeleton has evolved to encompass the dorsal nerve cord that has been developed from the notochord (a characteristic of invertebrates).
Their mitochondria do not have an electron trasnport chain and so cannot funciton in aerobic respiration.
Electron Transport Chain (ETC) essentially makes the energy required for respiration.
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Both the fantasin gene and the imaginin gene will be transcribed at high levels when activators specific for control elements A, B, C, D, and E are present in the cell.
Control elements C, D, and E are distal control elements for the imaginin gene.
<span>The fantasin gene will be transcribed at a high level when activators specific for control elements A, B, and C are present in the cell.</span>
