What will be an ideal response?
People with autism have lower levels of _____, a hormone that contributes to bonding behavior in other mammals
a. oxytocin
b. prolactin
c. estrogen
d. LH
a
Biology & Microbiology
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Arthropods invaded land about 100 million years before vertebrates did so. This most clearly implies that _____
A) arthropods evolved before vertebrates did B) extant terrestrial arthropods are better adapted to terrestrial life than are extant terrestrial vertebrates C) ancestral arthropods must have been poorly adapted to aquatic life, and thus experienced a selective pressure to invade land D) vertebrates evolved from arthropods E) arthropods have had more time to coevolve with land plants than have vertebrates
Biology & Microbiology
Membranes that surround the heart and lungs would be classified as ____
a. serous b. cutaneous c. mucous d. synovial e. tissue
Biology & Microbiology
In muscles, aerobic respiration uses glucose derived from stored glycogen as energy source for the first ten minutes of activity; after over half an hour, _____________ becomes the main fuel source.
A. lactate B. fatty acid C. myoglobin D. protein E. blood glucose
Biology & Microbiology
What causes a change in the number of chromosomes?
Biology & Microbiology