Physicians feel that the best way to differentiate between a fibroadenoma and a malignant tumor in the breast is through _____.
A. needle aspiration
B. a biopsy
C. a mammogram
D. an MRI scan
B. a biopsy
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Oxygenic photosynthesis made possible the accumulation of oxygen in Earth's atmosphere and oceans. The primary producers of oxygen as of 800 million years ago that power the modern carbon cycle are:
A. cyanobacteria. B. anoxygenic phototrophs. C. algae and plants. D. purple bacteria.
The translocation seen in the Philadelphia chromosome in myelogenous leukemia represents ____
a. a chromosomal aberration that is secondary to the cancer b. a chromosomal aberration that is caused by the development of cancer c. a proto-oncogene that has been deleted from chromosome 6 and inserted into chromosome 7 d. a specific chromosomal aberration accompanying a specific cancer e. the evidence of exposure to chemical carcinogens
Diffusion is one of the processes whereby materials are exchanged between a cell and its environment.
a. true b. false
Electron carriers In the carbon reactions, carbon dioxide molecules are reduced by the addition of electrons carried from the light reactions by __________.
a) ATP b) NADP+ c) NADPH d) Oxygen e) Water