In eukaryotic cells, DNA is divided into long segments called ________.
Fill in the blank(s) with the appropriate word(s).
chromosomes
In eukaryotic cells, DNA is divided into long segments called chromosomes.
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A zoologist analyzes the jawbones of an extinct mammal and concludes that it was an herbivore. The zoologist most likely came to this conclusion based upon _____
A) the position of muscle attachment sites B) the shape of the teeth C) the size of the mouth opening D) the angle of the teeth in the mouth
What evidence supports the hypothesis that humans originated in Africa?
A) H. sapiens genomes contain some alleles from Neanderthal genomes. B) One Y chromosome lineage is that originated 1,000 years ago is found in 8% of modern day Asian men. C) Alleles of nuclear genes are less variable in African populations than in other populations. D) Mitochondrial DNA sequence variation is higher in African populations than in other populations.
An ideal antimicrobial therapeutic drug exhibits all of the following characteristics, except
A. they are nontoxic to host. B. they are easily administered. C. they have limited capacity to elicit resistance. D. they are nonallergenic. E. they are easily broken down by host.
Which one of the following is a true statement comparing phospholipids and triacylglycerols (fats and oils)?
A. Both molecules contain a phosphate group. B. Triacylglycerols may be saturated or unsaturated, but all phospholipids are saturated. C. Phospholipids are the primary storage form for fats in our bodies. D. Phospholipid molecules have a distinctly polar "head" and a distinctly nonpolar "tail," whereas triacylglycerols are predominantly nonpolar. E. In nature, phospholipids occur in fused rings (sterol form), whereas triacylglycerols maintain a straight-chain form.