The double-stranded DNA molecule can be described as a twisted rope ladder. What component of DNA would be like the steps of the ladder?

A) DNA polymerase
B) nitrogenous bases
C) phosphate groups
D) sugar (deoxyribose) molecules


Ans: B) nitrogenous bases

Biology & Microbiology

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What is the only known eusocial mammal?

A. humans B. naked mole rats C. beavers D. prairie dogs E. honeybees

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The "missing link" between birds and dinosaurs was found when fossils of ________ were unearthed in a German quarry

a. Archaeopteryx b. Phascolarctos cinereus c. Sphenodon d. Saurophaganax

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Once an organism is placed in a specific species, the designation cannot be changed

Indicate whether the statement is true or false

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