Explain how carbon dioxide is transported through the bloodstream?
What will be an ideal response?
Answers may vary. CO2 enters the bloodstream from the tissues. Once in the bloodstream it will enter the red blood cells. A small amount combines with hemoglobin and forms carbaminohemoglobin. Most of it is transported in the form of bicarbonate ion (HCO3- ). The HCO3- then diffuses out of the blood to be carried by the plasma.
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Suppose you discover a new species of animal that does not have body segments, but is triploblastic, eucoelomate, and cephalized. Under the molecular phylogenetic scheme, you would allocate it to which phylum?
A. Mollusca. B. Echinodermata. C. Nematoda. D. Platyhelminthes. E. Arthropoda.
Which of the following is thought to be the descendant of ancient bacteria?
A. Nuclei B. Golgi bodies C. ER D. Mitochondria E. Lysosomes
DNA Ligase
What will be an ideal response?
Many of the mechanisms that cells use for maintenance and reproduction were first studied at the molecular levelin bacteria. Which bacterial species had a central role in advancing the field of molecular biology?
(a) E. coli (b) D. melanogaster (c) S. pombe (d) C. elegans