#Question id: 2438
#Unit 2. Cellular Organization
Rac, a GTPase superfamily protein,
a. is related to Ras.
b. may be activated by growth factors.
c. stimulates lamellipodia formation.
d. stimulates filopodia formation.
e. stimulates stress fiber assembly.
#Question id: 2120
#Unit 2. Cellular Organization
Which one of the following statements about membranes is true?
#Question id: 14687
#Unit 13. Methods in Biology
#Question id: 11176
#Unit 10. Ecological Principles
Species that reproduce once and then die are ______ species.
#Question id: 3397
#Unit 11. Evolution and Behavior
In a large natural population of Mimulus guttatus, one leaf was sampled from each of a large number of plants. The leaves were crushed and subjected to gel electrophoresis. The gel was then stained for a specific enzyme, X. Six different banding patterns were observed, as shown in the accompanying diagram.
Which one of the following conclusions is most appropriate based on the above observations?
A) There are three alleles of one locus and that the individuals with two bands are heterozygotes.
B) There are two alleles of one locus and that the individuals with two bands are heterozygotes
C) Population is present as hardy-Weinberg equilibrium
D) Population is not present as hardy-Weinberg equilibrium