Do arteries always carry highly oxygenated blood? What will be an ideal response?
No! The prominence of the systemic circulatory system sometimes creates the misunderstanding that
arteries carry highly oxygenated blood. But the characteristic of arteries is that they carry blood away
from the heart. Thus, in the pulmonary circulatory system they actually carry low oxygen blood.
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According to the animation, what does oxygen get reduced to at the end of the electron transport chain?
a. ATP b. NADH c. Water d. Electrons e. Protons
The structure that easily distinguishes a plant cell from an animal cell is
A. chloroplasts. B. the Golgi apparatus. C. the nucleus. D. the plasma membrane E. mitochondria.
Which of the following statements best supports the claim that organisms share fundamental processes as a result of evolution?
(A) All organisms that are introduced into new environments have the capacity to fill vacant ecological roles. (B) All organisms have the ability to utilize oxygen to harness energy from the chemical breakdown of organic compounds. (C) All organisms share a genetic code organized into triplet codons, making it possible for one organism to express a gene from another organism. (D) All organisms possess structures such as chloroplasts and mitochondria within their cells that reflect past symbiotic relationships between prokaryotic precursors.
Which organisms stain as either Gram-positive or Gram-negative?
a. Bacteria b. Mercaria c. Archaea d. Eukarya