The substance most rich in unsaturated fats is
A. fat that is solid at room temperature.
B. butter.
C. beef fat.
D. bacon grease.
E. olive oil.
E. olive oil.
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Which of the following was derived from an ancestral cyanobacterium?
A) chloroplast B) mitochondrion C) flagella D) mitosome
Which of the following would be the first step in the biosynthesis of a virus with reverse transcriptase?
a. A complementary strand of RNA must be synthesized. b. Double-stranded RNA must be synthesized. c. A complementary strand of DNA must be synthesized from an RNA template. d. A complementary strand of DNA must be synthesized from a DNA template. e. none of the above
Between 9 am and 7 pm, the lizard likely used endothermy to maintain a high, stable temperature.
a. true b. false
A karyotype of an individual with mild mental retardation shows three copies of the X chromosome. If this individual decides to have children, how is her chromosomal abnormality likely to affect her offspring?
a. All of her children will inherit an extra copy of the X chromosome. b. Any female children have a 75 percent chance of inheriting an extra copy of an X chromosome. c. She will be unable to produce male children. d. Half of her eggs will contain an extra copy of the X chromosome.