It is believed that eukaryotes evolved their mitochondria from a symbiotic relationship with a free-living aerobic bacteria.
Answer the following statement true (T) or false (F)
True
It is true that scientists believe that eukaryotes evolved their mitochondria from a symbiotic relationship with a free-living aerobic bacteria.
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A normal sperm count is ________ sperm per ejaculate.
A) 100,000 to 500,000 B) 1 to 2 million C) 15 to 200 million D) 1 to 3 billion
Steroid hormones and thyroid hormones do not
require a membrane receptor because they a. are small enough to pass directly through the membrane. b. are soluble in the lipid bilayer. c. pass through special membrane channels. d. are water-soluble. e. dissolve in the cholesterol of the membranes.
Hydrogen ions in the blood can be neutralized temporarily by which of the following?
a. bicarbonate b. ADH c. renin d. urea e. filtration
The inability of T and B cells to recognize the body’s MHC markers as foreign is known as ____
a. immunological tolerance b. immune intolerance c. immune surveillance d. immunity bias e. autoimmunity