Which communication method is most effective over short distances?
A) Vocalizations
B) Pheromones
C) Touch
D) Dominance hierarchies
E) Visual communication
E
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Why are the chances of an immune response in a patient given between 10 µg and 1g of an immunogen (drug) higher than a patient given higher than 1g or lower than 10 µg of the same drug?
What will be an ideal response?
Cells, cells, made of _____________.
Fill in the blank(s) with the appropriate word(s).
The umbilical cord of a mammal connects the
A) amnion and the chorion. B) maternal and fetal bloodstreams. C) yolk sac and the allantois. D) fetus and the placenta. E) embryo and the amnion.
Which statement is true of angiosperms?
a. All edible fruit are produced by eudicots. b. There are only two major groups of angiosperms. c. They all belong to the phylum Anthophyta. d. All angiosperms have a major tap root.