Who developed the two-part naming system
scientists use today to classify newly found
organisms?
a. Charles Darwin
b. Carolus Linnaeus
c. Aristotle
d. Alexander von Humboldt
e. Ernst Mayer
B
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Acetylcholine is a neurotransmitter that binds to receptors on skeletal muscle cells. The receptor-signal complex brings about a series of events that result in contraction of skeletal muscle
Venom from black widow spiders causes an explosive release of acetylcholine. What would that do to its victims? A) The victim's muscles would be unable to contract. B) The victim's muscles would be unable to relax. C) The victim's cell receptors would no longer be able to bind regulatory hormones. D) The victim's cell receptors would be able to bind regulatory hormones but at a rate greatly exceeding normal rates.
The plants and animals now present on acreage from which the trees were removed ten years earlier
represent a. primary succession. b. a climax forest. c. pioneer species. d. secondary succession. e. species introductions.
________ is the mechanism by which some organisms, such as Komodo dragons, can develop eggs into zygotes without sperm
Fill in the blank with correct word.
The greatest difference in the concentration of respiratory gases is found in which of the following pairs of mammalian blood vessels?
A) the pulmonary vein and the jugular vein B) the veins from the right and left legs C) the pulmonary artery and the inferior vena cava D) the pulmonary vein and the aorta