A true body cavity completely surrounded by __________ is called a coelom
a. ectoderm
b. mesoderm
c. endoderm
d. exoderm
e. mesoglea
B
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Two genes (A and B) are located on each of two pairs of homologous chromosomes. In a tetrad, one sister chromatid
contains alleles ab, while the other sister chromatid contains alleles AB (upper and lower case indicate different alleles of the same gene). Which genetic combinations are possible in the four gametes that are produced from a single chiasma between these chromosome pairs?
a. Ab, AB, ab, aB b. Ab, Ab, aB, aB c. Aa, Bb, ab, Ab d. Ab, Ab, AB, AB e. AB, AB, ab, ab
Each answer option below lists terms that classify cell types according to their developmental potential. Which of the options lists the terms from those capable of differentiating into the greatest number of different specialized cells to those capable of differentiating into the least number of different specialized cells?
a. multipotent, pluripotent, totipotent b. pluripotent, totipotent, multipotent c. totipotent, multipotent, pluripotent d. totipotent, pluripotent, multipotent e. multipotent, totipotent, pluripotent
The smallest particles occurring in soil are referred to as
A) clay. B) gravel. C) sand. D) silt.
Binding of which complex increases the ability of RNA polymerase to transcribe the lac operon?
What will be an ideal response?