Predict what would happen if an embryonic epidermal cell switched from expressing Ecadherin to N-cadherin
A. The cell would leave the epidermis and
join the neural cells.
B. The cell would become a neural cell.
C. The cell would die.
D. There would be no effect.
A
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Which blood type is the universal donor?
1.A+ 2.B 3.AB+ 4.AB 5.O
Allele frequencies can change across the geographic range of a species according to climate, geological features, or direction in the range
For instance, a certain allele frequency might go up along with the elevation or down as you go south in the species' range. This systematic change in frequency is referred to as A) genetic drift. B) q2. C) directional selection. D) a cline. E) heterosis.
An element has eight protons, nine neutrons, and eight electrons. Its atomic number and atomic mass, respectively, are __________.
a. 8 and 16 b. 8 and 17 c. 9 and 16 d. 9 and 17 e. 16 and 8