The sac which surrounds the heart is called the
A. endocardium.
B. pericardium.
C. atrium.
D. myocardium
B.
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Repeated sequences within eukaryotic genomes may be represented as long repeated sequences next to each other, and are called ___________ repeats
Repeated sequences in eukaryotic genomes can also be located throughout the genome, and are called _______________ repeats. A. tandem; dispersed B. dispersed; tandem C. overlapping; adjacent D. adjacent; overlapping E. None of the answer options is correct.
Most of a living organism (approximately 98%) is made up of what three elements?
What will be an ideal response?
The formation of amino acids under abiotic conditions was important because they serve as ____.
A. a supply of structural units for proteins B. enzymes to catalyze reactions C. subunits in the formation of DNA D. subunits in the formation of RNA E. subunits for the formation of lipids
Compare and contrast ionic bonds, covalent bonds, polar covalent bonds, and hydrogen bonds. Explain how valence electrons are involved in the formation of each
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