Lymph moves through
a. A.
b. B.
c. C.
d. D.
e. E.
Answer: c
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What is the main difference between plant defense mechanisms that use secondary chemical metabolites versus plant defense mechanisms that use a systemic response?
A. The metabolites are not as lethal as the systemic response. B. The metabolites are present at all times, and the systemic response must be induced. C. The metabolites can only help in defense against insects, not against other plants. D. The metabolites are toxic to the plants that produce them, the systemic response is safer. E. The metabolites are a more reliable way to kill the invader.
In deuterostomes, early embryos undergo ____ cleavage
a. spiral, indeterminate b. radial, indeterminate c. spiral, determinate d. radial, determinate e. radial, followed by spiral
Discuss the reasons why ART leads to more multiple and premature births than the general population. What will be an ideal response?
In a PET scan, a patient is injected with radioactively labeled glucose. Cells take up the radioactive glucose and the scanner detects levels of radioactivity in various parts of the body. This is a measure of the amount of glucose uptake. Cancer cells are often in an environment with low oxygen concentration and they take in high amounts of glucose. Why would a low oxygen environment lead to high glucose uptake?
A. They rely more on glycolysis which is less efficient than oxidative phosphorylation. B. Enzymes function more efficiently in the absence of oxygen. C. They rely more on oxidative phosphorylation which is less efficient than glycolysis. D. Because they require more oxygen to metabolize glucose. E. More energy is produced from glucose in hypoxic conditions.