B) sperm are to anthers.
C) pollen is to carpels.
D) pollen is to sepals.
A) 100 times more acidic.
B) 10 times more acidic.
C) 10 times more basic.
D) 100 times more basic.
Answer: A
Which of these causes damage to kidney cells in glomerulonephritis?
A) Antibodies against Streptococcus B) Circulating immune complexes C) Complement fixation D) Formation of immune complexes E) Production of IgG
Bacteria in biofilms
A) are composed of only a single species. B) are easily treated and removed. C) form on teeth, medical devices and in the middle ear. D) behave the same way as planktonic, or single-living bacteria.
In flowering plants, eggs are to ovules as
The tube feet of a sea star
(a) bear tiny toes. (b) are located only at the tips of the arms. (c) function in movement. (d) protect the organism from predatory fish.