Cellular division within the eukaryotic cells requires DNA to condense into the:
A. 30-nm chromatin fiber.
B. 1400-nm chromatin fiber.
C. 300-nm chromatin fiber.
D. 2-nm chromatin fiber.
E. 44-nm chromatin fiber.
B
Biology & Microbiology
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Under the ___________ , species are identified based on their unique habitat requirements.
A. phylogenetic species concept B. biological species concept C. evolutionary species concept D. ecological species concept E. general lineage concept
Biology & Microbiology
The "poles" of a cell are its
a. centrosomes. b. centromeres. c. autosomes. d. centrioles. e. automeres.
Biology & Microbiology
Which of these fly organs, as they exist in the description above, best illustrates an exaptation?
A) vestigial halteres B) halteres C) mouthparts D) eggs
Biology & Microbiology
The original source of variation within a population comes from ________
Fill in the blank(s) with correct word
Biology & Microbiology