Horizontal gene transfer is less prevalent in eukaryotic species because
A. of the presence of organelles in the cells of eukaryotic species.
B. of the multicellularity in eukaryotic species, which is lacking in prokaryotic species.
C. eukaryotic species reproduce by sexual reproduction.
D. of multicellularity and sexual reproduction.
E. of the presence of organelles and multicellularity.
D. of multicellularity and sexual reproduction.
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Tanisha and Tawanda are twins but do not look alike. They are the result of fertilization of
A) one oocyte by two sperm cells. B) two oocytes by one sperm cell. C) two oocytes by two sperm cells. D) one oogonium by one spermatogonium.
Genomic DNA is replicated during which of the following cell-cycle phases?
A) G0 B) G1 C) G2 D) M E) S
What would be the valence number of electrons in the sulfur (S) atom? Its atomic number is 16.
A. 6 B. 8 C. 2 D. 32 E. 16
The heart wall muscle layer is known as the ____
a. epicardium b. pericardium c. endocardium d. endothelium e. myocardium