Immediately after a meal, which one of the following is first used by cells as an energy source?

Esherichia coli and Clostridium acetylbutylicum are reported to be derived from a common ancestor. They both have similar but not identical gene sequences. Which of the following could best explain this difference in genetic coding?

A. They have a common ancestor, their DNA has been inherited from the common ancestor, therefore it will be similar. B. The two species never diverged but they were discovered by two different scientists and therefore given different names. C. These orthologs show identical gene segments, but the entire sequence has differences, therefore they are related through ancestoral genes. D. Gene duplication created paralogs. E. After the two species diverged, the genes accumulated random mutations that resulted in similar but not identical gene sequences.

What is the name given to viruses that are single stranded RNA that acts as a template for DNA synthesis

What will be an ideal response?

Which anatomical features are homologous?

A. the forelimb of a dog and the forelimb of a cat B. the forelimb of a dog and the hindlimb of a cat C. wings of a butterfly and wings of a sparrow D. the mouth of a mosquito and the beak of a hummingbird

The two major components of blood are

A. red blood cells and white blood cells. B. platelets and plasma. C. plasma and red blood cells. D. plasma and serum. E. formed elements and plasma.