When caught early, breast cancer is often treated by
1.lumpectomy.
2.modified radical mastectomy.
3.radical mastectomy.
4.chemotherapy, alone.
5.radiation therapy, alone.
1
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Echinoderms can be best described as ________.
A. eukaryotic autotrophs that lack tissue, but have bilateral symmetry as larva, and a water vascular system B. eukaryotic heterotrophs with tissue, bilateral symmetry as larva, and a water vascular system C. eukaryotic autotrophs with tissue, bilateral symmetry as larva, and a water vascular system D. eukaryotic heterotrophs with tissue, bilateral symmetry as larva, and a blood vascular system
Four of the five structures listed below participate in
a common function. Select the exception. a. sensory neuron b. medulla c. interneuron d. effector e. receptor
What drives the process of transpiration?
a. upward pressure as sugar is forced into the roots b. evaporation c. pumping by the xylem cells d. passive transport
Which of the following is one method in which a change in the DNA leads to genetic changes in a population?
A) mutation B) founder effect C) genetic drift D) bottleneck effect