Water typically makes up about what percentage of a plant?
A. 80%
B. 50%
C. 90%
D. 100%
E. 40%
C. 90%
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What have you learned in the chapter about how humans can minimize their effects on food webs and nutrient
cycles?
What will be an ideal response?The symbiotic relationship between roots of this pine seedling and a fungus is known as a(n):
1.Zygomycete
2.Mycorrhiza
3.Lichen
4.Arbuscule
All of the following floral parts are directly involved in pollination or fertilization except the:
a. style. b. sepal. c. anther. d. stigma. e. carpel.
Which statement about proto-oncogenes is false?
A) Proto-oncogenes are normal genes with the potential to become oncogenes. B) Many proto-oncogenes code for growth factors. C) A mutation must occur in a cell's DNA for a proto-oncogene to become an oncogene. D) If a proto-oncogene's gene product is produced in smaller quantities, a cell may become cancerous.