How could an embryonic stem cell be used to repair a severed spine?
A) Embryonic stem cells secrete proteins that repair all other cell types, including nerve cells.
B) Embryonic stem cells can grow into any other cell type, including a nerve cell.
C) Embryonic stem cells can cause any other cell type to multiply.
D) Embryonic stem cells are primarily involved with neural growth and development.
B
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Which of the following models of growth takes
place when the amount of available resources is not limiting?
a. arithmetic growth b. logistic growth c. logarithmic growth d. exponential growth e. exponential growth and arithmetic growth
The physical structure of the capillaries in the nephron ____
a. ensures balanced filtration b. prevents proteins from filtering into urine c. allow blood cells to pass readily out of the kidneys d. hold in salt ions e. block foreign metabolites from entering the urinary tract
Which antibodies are secreted when an allergic person is exposed to an allergen?
a. IgA b. IgD c. IgE d. IgG e. IgM
Which of the following organelles would form a membrane-bound package, also known as a vesicle?
A) chloroplasts B) ribosomes C) Golgi apparatus D) mitochondria E) lysosomes