______ do NOT depend on the circulatory system to deliver oxygen to the tissues.

A. Insects
B. Molluscs
C. Mammals
D. Birds
E. Amphibians


A. Insects

Biology & Microbiology

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Which of the following statements best describes the role of NAD+/NADH in glycolysis?

A) NADH is used to produce energy by directly creating the phosphoanhydride bonds in ATP. B) NAD+ is used to carry electrons. C) NADH is capable of pumping ions during glycolysis. D) NADH is used primarily in substrate-level phosphorylation. E) all of the above

Biology & Microbiology

Helical and icosahedral are terms used to describe the shape of a viral ________.

A. capsomere B. envelope C. spike D. core E. capsid

Biology & Microbiology

Eukaryotic mRNA has a significantly longer half life than its prokaryotic counterpart. How is this

accomplished in eukaryotes? What processes tend to degrade mRNA molecules in both eukaryotes and prokaryotes, and why are these processes needed? What will be an ideal response?

Biology & Microbiology

A salt will dissolve in water to form ____.

A. acids B. only hydrogen and oxygen bonds C. ions other than H+ and OH- D. bases E. buffers

Biology & Microbiology