According to the ABC model of floral development, which genes would be expressed in a showy ornamental flower with multiple sepals and petals but no stamens or carpels?
A) A genes only
B) B genes only
C) C genes only
D) A and B genes only
E) A and C genes only
Answer: D
You might also like to view...
How do mass extinction events influence subsequent species composition and diversity?
A. by immediately increasing species diversity B. by permanently altering climate C. by reducing competition among surviving organisms D. by eliminating smaller organisms instead of larger organisms
The DNA of an organism is studied and found to contain 30% adenine. Based on this you would
predict that the DNA of this organism also contains 30% ____.
a. thymine b. cytosine c. each of cytosine and guanine d. each of thymine and guanine e. guanine
When exploring the Universe, looking for life, most scientists agree we should look for “carbon-based life forms.” Why is carbon considered so important to life?
a. Carbon atoms are a minor but very important component in lipids which are needed for life. b. The Carboniferous Period is a geological period on Earth when carbon was very prevalent. It is believed that all planets with life must pass through this period. c. The carbon atom’s ability to form four covalent bonds to as many as four different atoms makes it a fundamental structural component in the organic macromolecules. d. Carbon atoms make matter that burns readily, and it is believed that life could not develop without fire.
The insulation that keeps the signal within the axon is called what?
a. myelin sheath b. glial bodies c. Nodes of Ranvier d. axon terminals