What type of fiber allows tissue to easily stretch and recoil?
a. elastic
b. connective
c. collagen
d. dense regular
e. loose regular
ANSWER: a
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The organism Caenorhabditis elegans, a member of the phylum ____, is an important model organism
for studies of the genetic control of development.
a. Arthropoda b. Onychophora c. Nemertea d. Annelida e. Nematoda
Joan and her doctor notice a suspicious lump in her breast. Joan also has a family history of breast cancer. Which of the following is not a likely next step as they work to determine the cause of the lump?
A. performing a diagnostic mammogram B. genetic testing for mutations in the BRCA1 gene C. taking a biopsy of the lump to look for the presence of cancer cells D. performing a mastectomy to remove all breast tissue in that breast
Vaccines produced by genetically engineered bacteria cannot cause disease they are modeled after
Indicate whether the statement is true or false
Please choose the one BEST response for each.
A. neuroglia B. detects a stimulus C. both receives and sends signals from other neurons D. neurotransmitter molecule E. controls muscles and glands F. sodium-potassium pump G. gray matter H. voltage difference across a cell membrane I. voltage difference across a cell membrane that is not receiving stimulation J. dendrite K. brief reversal of the voltage difference across a cell membrane L. a response intensifies the conditions that caused its occurrence M. neuron membrane potential at which gated sodium channels open N. electroencephalography O. positron-emission tomography