Which type of communication mechanism travels the best in water?
a. Sound
b. Smell
c. Taste
d. Sight
e. All of these choices travel equally as well.
a
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Which is incorrect about the Fc region of an immunoglobulin?
A. It contains an effector molecule that can bind to cells such as macrophages and mast cells. B. It is called the crystallizable fragment. C. It determines the class to which the immunoglobulin belongs. D. It contains an effector molecule that can fix complement. E. It forms the antigen binding sites.
Meiosis and Changes in Number of Chromosomes
What will be an ideal response?
Which of the following pairs indicates the closest
macroevolutionary link among the animals according to the evolutionary history tree in the text? a. turtles; crocodiles b. lizards; amphibians c. mammals; birds d. bony fishes; lung fish e. crocodiles; birds
Four of these statements are true about mitochondria. Which one is not true?
A. They have DNA. B. Their DNA can experience mutations. C. In animals, the mitochondria come from the mother. D. They undergo genetic recombination during fertilization. E. Their DNA can be used as molecular clock.