Which of the following is the largest or most inclusive group?
A) Family B) Genus C) Order D) Phylum E) Class
D
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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.
Refer to the accompanying figure. Which organelle evolved from the photosynthetic bacteria?
a. nucleus b. chloroplast c. food vacuole d. mitochondria e. endoplasmic reticulum
What group of microbes is known to grow at more acidic pH's
What will be an ideal response?
Which of the following statements is not true about the possible fates of glyceraldehyde 3-phosphate?
(a) It can be exported from the chloroplast to the cytosol for conversion into sucrose. (b) It can be used to make starch, which is stored inside the stroma of the chloroplast. (c) It can be used as a precursor for fatty acid synthesis and stored as fat droplets in the stroma. (d) It can be transported into the thylakoid space for use as a secondary electron acceptor downstream of the electron-transport chain.