The first species of a community are __________.
Fill in the blank(s) with the appropriate word(s).
pioneer species
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Most cells have a resting membrane potential between ________.
Fill in the blank(s) with the appropriate word(s).
How many chromosomes would be found in the karyotype of a Down syndrome female?
A) 44 B) 45 C) 46 D) 47
Map units on a linkage map cannot be relied upon to calculate physical distances on a chromosome for which of the following reasons?
A) The frequency of crossing over varies along the length of the chromosome. B) The relationship between recombination frequency and map units is different in every individual. C) Physical distances between genes change during the course of the cell cycle. D) The gene order on the chromosomes is slightly different in every individual.
This embryonic structure will become the embryo's part of the placenta
A) morula B) trophoblast C) zygote D) corona radiata