Which of the following is NOT a characteristic of bacterial chromosomes?
A. They are single stranded.
B. They are around 10? smaller than eukaryotic chromosomes.
C. They contain gene coding regions and regulatory regions.
D. They have 10-base-pair regions that control DNA folding.
E. They have only one origin of replication.
A. They are single stranded.
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The oldest endospores to be revived and cultured to produce live bacteria are
A) 25,000 years old. B) 250 years old. C) 250,000 years old. D) 250 million years old. E) 2,500 years old.
A ________ prevents sperm from entering the vagina and provides some protection against STDs
Fill in the blank(s) with correct word
Characteristics of eudicots include all EXCEPT
A. woody or herbaceous plants. B. flower parts in fours and fives. C. leaves with netted veins. D. vascular bundles arranged irregularly in the stem. E. two cotyledons.
Some bones have __________ that makes blood cells.
Fill in the blank(s) with the appropriate word(s).