Forms of the Ras protein found in tumors usually cause which of the following?
A) DNA replication to stop
B) DNA replication to be hyperactive
C) cell-to-cell adhesion to be nonfunctional
D) cell division to cease
E) excessive cell division
Answer: E
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Like prokaryotic cells, most eukaryotic cells have an external cell wall.
Answer the following statement true (T) or false (F)
The release of testosterone requires
a. GnRH. b. luteinizing hormone. c. Sertoli cells. d. GnRH and luteinizing hormone. e. GnRH, luteinizing hormone, and Sertoli cells.
The total resources a population consumes and the wastes it produces is its ____
a. ecological footprint b. vital capacity c. carrying capacity d. nonrenewable resources e. limiting factor
Which of the following is not considered a micronutrient?
A. Copper (Cu) B. Magnesium (Mg) C. Manganese (Mn) D. Zinc (Zn)