In fetal circulation, most blood is shunted away from the lungs. Why is this the case?
A) The lungs have their own circulation.
B) The lungs don't need any blood.
C) The lungs do not form until right before birth.
D) The fetus receives oxygen at the placenta, and the lungs are not yet fully functional.
D
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All living things need carbon. How does most carbon enter the living portion of an ecosystem?
A. Atmospheric CO2 taken in by photosynthesis B. Elemental carbon taken in by plant roots C. Elemental carbon taken in by plant leaves D. Atmospheric CO2 taken in by soil bacteria
List some of the applications of DNA sequencing
What will be an ideal response?
The food vacuoles and phagocytic vacuoles are most similar to
A. chloroplasts. B. lysosomes. C. Golgi apparatus. D. mitochondria.
________ are toxic proteins secreted by pathogenic bacteria, and ________ are toxic components of the outer membrane of gram-negative bacteria
A) Endotoxins; parasites B) Endotoxins; botulinum toxins C) Exotoxins; enterotoxins D) Exotoxins; endotoxins