The first gene therapy experiments were undertaken in an attempt to cure otherwise fatal genetic diseases in children. What type of incurable genetic disease was the first gene therapy trial attempting to cure?
A) immune deficiency
B) cancer
C) cystic fibrosis
D) Tay-Sachs
E) epidermolysis bullosa
A) immune deficiency
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What is the primary limiting factor that determines why no female animal can produce a very large number of very large eggs?
A) Time is limited. B) There are energy constraints. C) Temperature constraints will prevent females from carrying too many eggs. D) Male availability is limited. E) There will be an increase in predation pressure if the females carry too many large eggs.
What is the difference between endocrine and exocrine glands?
a. Endocrine glands are discrete structures, while exocrine glands may be specialized cells in other tissues. b. Exocrine glands produce hormones, while endocrine glands do not. c. Endocrine glands only affect cells in the immediate area, while exocrine glands do not. d. Endocrine glands secrete into the interstitial fluid, while exocrine glands release secretions into ducts. e. Exocrine glands secrete neurohormones, while endocrine glands do not.
In scanning electron microscopy, an electron beam passes through a very thin slice of a specimen and then falls onto a
photographic plate or a fluorescent screen. Indicate whether the statement is true or false.
The adrenal cortex provides a slower but long-term stress response in comparison to the adrenal medulla.
Answer the following statement true (T) or false (F)