What is a key trait of a multicellular organism?
a. The organism has many cells.
b. All the organism's cells have the same function.
c. A division of labour exists among the organism's cells.
d. All the organism's cells are similar in shape.
Answer: c. A division of labour exists among the organism's cells.
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Often it is important for health reasons to induce labor (i.e., smooth muscle contractions) in pregnant women. The drugs used for this purpose would most closely resemble
A. arginine vasotocin. B. oxytocin. C. antidiuretic hormone. D. prolactin. E. cortisol.
The causative agent of whooping cough is ________.
A. Bordetella pertussis B. Campylobacter jejuni C. Bartonella henselae D. Ehrlichia chaffeensis
The type of system depicted in the accompanying figure:a
can be found in arthropods. b. can be found in cephalopods. c. can be found in annelids. d. has hemoglobin as the oxygen transporting pigment. e. can be found in arthropods and annelids.
Scientific laws are used to describe natural events or relationships. Which scientific law explains why the gametes formed by an organism do NOT contain exactly the same alleles as alleles as the parent?
A) the law of conservation of matter B) the law of independent assortment C) the second law of thermodynamics D) the law of conservation of energy