Which of the following hormones increases blood pressure by constricting arterioles all over the body?
A) Angiotensin B) Aldosterone C) ADH D) Erythropoietin
A
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What is the difference between a primary and a secondary source?
A. A primary source is the raw data before scientists publish, whereas a secondary source is a description of the original material. B. A primary source is the original material published by the scientists, whereas a secondary source is a description of the original material. C. A primary source is the original material published by the scientists, whereas a secondary source is the raw data before scientists publish. D. There is no difference between primary and secondary sources.
Which genetic event is a source of new alleles within a population?
a. Mutation b. Crossing over during Meiosis I c. Independent assortment during Meiosis I d. Change in chromosomal number e. Fertilization
A complex of proteins and small nuclear RNAs that form discrete particles to mediate splicing is a
A) holoenzyme. B) spliceosome. C) nucleosome. D) ribosome. E) chromosome.
After which Period did the last mass extinction
occur?
a. Permian b. Triassic c. Jurassic d. Ordovician e. Cretaceous