There was no protective ozone layer early in Earth's history, which allowed Earth's surface to be bombarded with ultraviolet radiation

Indicate whether the statement is true or false


TRUE

Biology & Microbiology

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A transgene is best described as  

A.  hard to destroy once inserted into a genome. B.  hard to study because of its transposons. C.  created by several of the DNA motifs. D.  an inserted foreign gene. E.  a result of endosymbiosis.

Biology & Microbiology

Which of the following is an example of a lipid?

a. amino acids b. monosaccharides c. steroids d. disaccharides

Biology & Microbiology

A farmer produces a variety of apple with deep pink flesh by selectively crossbreeding apples with pinkish hues. This is an example of

A) convergent evolution. B) natural selection. C) artificial mutation. D) artificial selection. E) inheritance of acquired characteristics.

Biology & Microbiology

One-millionth of a meter is called a

A) centimeter. B) decimeter. C) micrometer. D) millimeter. E) nanometer.

Biology & Microbiology