Animals need O2 because it ________
A) plays a role in obtaining energy from food
B) helps animals synthesize proteins
C) is necessary to make CO2
D) is needed to deliver hemoglobin to the cells of an animal's body
A
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Indwelling catheter biofilm infections are more resistant to antibiotics than nonbiofilm infections.
Answer the following statement true (T) or false (F)
What structure is required to be present in order for a reactant to turn into an intermediate during a normal reaction? a. Enzyme b. None are required
c. Substrate d. All are required. e. Product
The parasitic Rhagoletis flies show such a preference for either hawthorn or apple trees that they are no longer interbreeding populations. What type of speciation does this scenario illustrate?
A) Specialization B) The founder effect C) Allopatric D) Polyploidy E) Sympatric
Which of the following is NOT an oncogenic virus?
A. Varicellovirus B. HTLV-1 C. Hepatitis B virus D. Human papillomavirus