Which of the following most often should lead to allopatric speciation?
A) Habitat isolation
B) Behavioral isolation
C) Gametic incompatibility
D) Mating time differences
A
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A challenge to traditional (pre-1860) ideas about species came from embryology, where it was discovered that __________.
A. mutations have a far more dramatic effect on embryos than on adult organisms B. all animals develop similar embryonic gills C. the more advanced the animal, the more slowly it develops D. embryos of dissimilar organisms, such as sharks and humans, resemble each other
Which of the following is (are) a sterilizing gas(es) that can be used on heat-sensitive materials?
A. Isopropanol B. Glutaraldehyde C. Ethylene oxide D. Chlorine gas
Antibiotics that target the cell wall are an effective treatment against many pathogenic bacteria
Indicate whether the statement is true or false
At the end of this experiment two layers are formed in the tube. Where will the DNA be?
A) In the aqueous mixture at the bottom of the tube. B) At the interface between the two layers. C) In the alcohol layer at the top of the tube.