In each fly species, the entire body segment that gave rise to the original flight wings is missing. The mutation(s) that led to the flightless condition could have _____
A) duplicated all of the Hox genes in these flies' genomes
B) resulted in paedomorphosis
C) altered the expression of a Hox gene
D) originated in another species
C
You might also like to view...
A characteristic that an organism displays is called __________
A. a gene B. a chromosome C. DNA D. gene expression E. a trait
Which is the correct sequence of events for protein degradation in eukaryotes?
A. ubiquitin binds target protein ? protein unfolds and enters proteasome ? protein directed to proteasome ? protein digested ? amino acids are released and recycled B. ubiquitin binds target protein ? protein directed to proteasome ? protein unfolds and enters proteasome ? protein digested ? amino acids are released and recycled C. protein directed to proteasome ? ubiquitin binds target protein ? protein unfolds and enters proteasome ? protein digested ? amino acids are released and recycled D. protein directed to proteasome ? protein unfolds and enters proteasome ? ubiquitin binds target protein ? protein digested ? amino acids are released and recycled E. protein directed to proteasome ? protein unfolds and enters proteasome ? protein digested ? ubiquitin binds target protein ? amino acids are released and recycled
The oldest proposed cell microfossils are from ____ year-old rocks
a. 3.5 billion b. 1.25 billion c. 1.8 billion d. 1.5 billion e. 500 million
Phytochrome is converted from the inactive to the active form by being exposed to light of what color?
A. Far red B. Red C. Yellow D. Blue E. Violet