________ are small oligonucleotides, 20—30 nucleotides in length, that bind specifically to mRNA and facilitate the destruction of the mRNA.

Fill in the blank(s) with the appropriate word(s).


Silencing RNAs, or siRNAs

Biology & Microbiology

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Which concept helps visualize resource use and the potential for interspecific competition in nature?

a. allopatric speciation b. the competitive exclusion principle c. sympatric speciation d. ecological niche e. resource partitioning

Biology & Microbiology

The above figure represents

a. individual genes from an asexual worm. b. maternal chromosomes that are identical. c. paternal chromosomes that are identical. d. both maternal and paternal chromosomes. e. none of these.

Biology & Microbiology

In humans, the male is the homogametic sex

Indicate whether the statement is true or false

Biology & Microbiology

The E. coli that normally live in the human large intestines and produce vitamin K that the body uses would be best termed a ________ relationship.

A. saprobic B. parasitic C. commensal D. mutualistic

Biology & Microbiology