What must happen to amino acids before they can be used in catabolic reactions?
A. They must be decarboxylated
B. They must be deoxygenated
C. They must be dehydrogenated
D. They must be deaminated
D. They must be deaminated
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Why has the development of iPS cells been viewed as a major breakthrough in the development of stem cell therapies? Select all correct choices
A. It allows us to develop pluripotent stem cells without the ethical issues involved in obtaining them from human embryos. B. It may ultimately allow us to obtain stem cells from any individual - we can match the patient to the tissue. C. It is easy and inexpensive. D. It is a proven technique that we will be able to move into clinical trial very quickly. E. It will allow us to "grow" new organs very quickly.
The neritic zone produces ________ of the world's animal harvest of fish and shellfish
a. 60% b. 40% c. 10% d. 90%
Answer the following questions true (T) or false (F)
1. Most K-selected species have short generation times. 2. Elephants are good examples of r-selected species. 3. K-selected species are also called equilibrium species.
Ancestors of the koala lived on the ground, but modern koalas live in trees and eat eucalyptus leaves, which are poisonous to most other animals. The difference between the ancestor and modern koalas was caused by
A. the presence of homologous structures B. the presence of vestigal organs C. selective breeding D. natural selection