Four of the five answers listed below are lipids. Select the exception
a. triglyceride
b. wax
c. phospholipid
d. amino acid
e. steroid
d
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Biologists sometimes damage ecosystems in order to study them. For example, researchers have
fogged rainforest trees with insecticides to search for undiscovered species that fall to the ground when poisoned. Others have deliberately added phosphates to natural lakes to study the eutrophication process. What is your ethical position on such studies? Should they be banned, or is the knowledge gained worth the harm they cause?
What will be an ideal response?Recruited leukocytes that have invaded the vessel wall are directed to the pathogen by the process of
A) chemotaxis. B) diapedesis. C) migration. D) attachment. E) opsonization.
How can sampling error be reduced?
A) by increasing the sample size B) by performing statistical tests on experimental data C) by performing double-blind experiments D) by monitoring changes in the experimental and control groups
Which of the following is part of the body's second line of defense?
A. Vomiting B. Saliva C. Phagocytosis D. Cytotoxic T-cells