The tree in the figure is based on which type of traits, and what is the name of the genus for the most recent horse?
A. Genetic homology: Pliohippus.
B. Genetic (DNA): Orohippus.
C. Morphological: Equus.
D. Morphological: Hyracotherium.
E. Molecular: Equus.
Answer: C
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What cell type secretes histamine at the site of an infection?
A) macrophages B) cytotoxic T cells C) mast cells D) natural killer cells E) helper T cells
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Compare and contrast the oncogenic viruses human herpesvirus 4 (Epstein-Barr virus) and hepatitis B virus (HBV).
What will be an ideal response?