If an Arabidopsis plant does not express homeotic genes during flower development
A. The plant will die.
B. The plant will only develop to the heart stage.
C. The plant will not develop cotyledons.
D. The plant will develop leaves instead of flowers.
E. The plant will develop flowers instead of leaves.
D. The plant will develop leaves instead of flowers.
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Plants having the ability to take up organic nitrogen are most likely to be found in the ____
a. arctic tundra b. salt marsh c. tropical forest d. grassland e. temperate forest
Because of the atomic structure of carbon, it tends to form
a. covalent bonds. b. ionic bonds. c. hydrogen bonds. d. sulfide bonds. e. bonds only with hydrogen.
Which of the following statements about retroviruses is correct?
A) Retroviruses produce mRNA from the integrated viral DNA but produce progeny RNA genome from the genomic RNA template. B) Retroviruses produce both progeny RNA genome and mRNA from the genomic RNA template. C) Retroviruses produce progeny RNA genome from the integrated viral DNA but produce mRNA from the genomic RNA template. D) Retroviruses directly use the genomic RNA for viral protein translation. E) Retroviruses produce both progeny RNA genome and mRNA from the integrated viral DNA.
A population of mice shifting from light-colored coats to darker coats is displaying the effects of _____ selection
A. Artificial B. Disruptive C. Directional D. Sexual E. Stabilizing