Define the design and structure of a bioassay.
What will be an ideal response?
Bioassays are experiments (with one or more experimental and control groups) designed to test the effects of man-made substances (e.g., new drugs, new fertilizers, and new herbicides) and human designed protocols (e.g., waste discharges) on humans in general and on other aspects of the environment. One example is the LD50 of toxic substances (the lethal dose causing the death of 50% of exposed organisms).
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Which of the following is a paracrine regulator that affects almost every organ in the body?
A. insulin B. testosterone C. prostaglandin D. gonadotropin E. epinephrine
What is the term for gene regulation that occurs by removing introns and splicing together exons that will be sent to a ribosome?
a. epigenetic level of regulation b. post-transcriptional level of regulation c. translational level of regulation d. post-translational level of regulation
To start the transcription process, a large molecule, __________________, recognizes a _______________________.
a) DNA polymerase; termination site b) RNA polymerase; promoter site c) DNA polymerase; promoter site d) DNA polymerase; promoter site e) RNA polymerase; messenger RNA
In the late 1700s, two populations of minnows became isolated when an earthquake altered the path of a river. Now the populations can no longer successfully breed with each other even when they are both moved to the same pond
These organisms have undergone ________ speciation. Fill in the blank(s) with correct word