What unusual amino acid-based hormone uses the direct gene activation method illustrated in this image?
Answer: thyroxine
Biology & Microbiology
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Preparation for the fight-or-flight response includes activation of the _____ nervous system
A) sympathetic B) somatic C) central D) visceral E) parasympathetic
Biology & Microbiology
Snow geese usually select mates of their own color, an example of ____
a. genetic drift b. founder effects c. population bottlenecks d. nonrandom mating e. random mating
Biology & Microbiology
How do epithelial cells obtain their nutrients? a. Direct blood supply from an artery
b. Nutrients are delivered by macrophages. c. Direct blood supply from a vein. d. Diffusion from adjacent cells. e. Osmosis of nutrients from underlying tissue.
Biology & Microbiology
The spindle fibers are produced by the
A) nucleus. B) chromosomes. C) centrioles. D) chromatin.
Biology & Microbiology