What is cellular aging and what causes its occurrence? What will be an ideal response?
Concepts to Consider: In cellular aging, cells lose their ability to divide. It is related to the
discovery that most cells lose the ability to produce telomerase, which is an enzyme that replicates the DNA of the ends of chromosomes. Apoptosis, high-calorie diets, hormonal
changes, malfunctions of the immune system, and DNA damage by radiation also contribute
to premature aging
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Primary growth
a. occurs along the sides of stems. b. is dependent upon apical meristem. c. increases the diameter of older plants. d. is responsible for additions to woody parts. e. fits all of these descriptions.
Explain energy transduction and receptor potential as they relate to the function of a sensory receptor. What will be an ideal response?
When you eat a hamburger, you are eating at which trophic level?
A. level 1 B. level 2 C. level 3 D. level 4
Virus infected cells and tumor cells are targeted by ________, which are lymphoid derived cells of the innate immunity
a. cytotoxic T cells b. neutrophils c. plasma cells d. natural killer cells