Choose the true statements about the evolution of flower symmetry.
_____ Some radially symmetric flowers have ancestors with bilaterally symmetric flowers.
_____ Having radially symmetric flowers is ancestral to having bilaterally symmetric flowers.
_____ All cases of flowers with bilateral symmetry involve the CYCLOIDIA (CYC) gene.
_____ Bilateral symmetry in some flowers is a homoplastic character derived through convergent evolution.
__X__ Some radially symmetric flowers have ancestors with bilaterally symmetric flowers.
__X__ Having radially symmetric flowers is ancestral to having bilaterally symmetric flowers.
_____ All cases of flowers with bilateral symmetry involve the CYCLOIDIA (CYC) gene.
__X__ Bilateral symmetry in some flowers is a homoplastic character derived through convergent evolution.
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An adult brain weighs about
a. one pound. b. two pounds. c. three pounds. d. one half pound. e. ten pounds.
A chromosome has broken, and a piece of one chromosome is translocated to a non-homologous chromosome. This is an example of what type of chromosomal alteration?
A) paracentric inversion B) dicentric bridge C) unbalanced translocation D) Robertsonian translocation E) inversion loop
The location of translation in prokaryotic cells is
A. on ribosomes. B. on the plasma membrane. C. on mesosomes. D. on chromosomes E. in the nucleoid.
Dormant, thick-walled resting cells of cyanobacteria that are resistant to desiccation are called ________.
A. akinetes B. baeocytes C. thylakoids D. hormogonia