What microbe is responsible for crown gall disease in plants and is used to create transgenic plants incorporating Ti vectors?
A) Thermus aquaticus
B) Agrobacterium tumefaciens
C) Bacillus thuringiensis
D) Escherichia coli
E) Saccharomyces cerevisiae
B
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The liquid part of blood is called
A) water. B) plasma. C) serum. D) interstitial fluid.
Human chorionic gonadotropin (hCG)
a. is produced by the amnion. b. can be used to reveal pregnancy. c. is stored in the ovaries. d. acts as a hormone signaling menstruation. e. is needed to form the placenta.
In the United States, most thyroid disorders are caused by ____
a. iodine deficiency b. iron deficiency c. an autoimmune disorder d. insecticides e. a combination of more than one of these
Phagocytic white blood cells digest many of the invasive bacteria that enter the human body. How could a bacterial cell enter a white blood cell in order to be digested?
A) facilitated diffusion B) active transport C) exocytosis D) endocytosis