The world ocean covers 70.8% of the earth's surface

Indicate whether the statement is true or false


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Biology & Microbiology

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Circular DNA molecules found in nature (such as bacterial, viral, or mitochondrial DNA) are

A) positively supercoiled. B) negatively supercoiled. C) not supercoiled, due to their small size. D) always oriented in a triple helix to conserve space. E) always in the relaxed state.

Biology & Microbiology

A(n) _____ disease has only recently been detected in humans, or has recently expanded its range

a. emerging b. epidemic c. pandemic d. sporadic e. plague

Biology & Microbiology

Which term is used to describe the way homologous pairs of chromosomes line up in random orientations relative to each other during metaphase I?

A. independent assortment B. random fertilization C. crossing over D. genetic variation

Biology & Microbiology

If you are setting up a PCR reaction, how much extension time per cycle should you allocate for the Taq DNA polymerase to amplify a 5-kb DNA fragment from a 10-kb template?

A) 1 minute B) 2.5 minutes C) 5 minutes D) 10 minutes E) 20 minutes

Biology & Microbiology