Flowering plants originated during the
A. Permian Period.
B. Tertiary Period.
C. Devonian Period.
D. Cretaceous Period.
E. Jurassic Period.
D. Cretaceous Period.
You might also like to view...
Bryophytes are able to actively control their hydration
A. true B. false
Of the following choices, which could be used in the treatment of a patient in order to determine the patient's cancer subtype?
A. Microarray analysis B. Western Blot analysis C. Oryza sativa D. PCR E. Transformation
What is the major limiting factor for benthic communities on continental shelves?
a. Food b. Space c. Substrate d. Light
In a certain variety of plants, a cross between a red-flowered plant and a white-flowered plant
produced an all-red flower F1. In the F2 there were 140 red, 50 cream, and 65 white. (a) Offer an explanation for this F2 ratio. (b) What ratio would be produced in a testcross of the F1 hybrid? (c) What ratio would be produced if all the white F2 plants were crossed among themselves? What will be an ideal response?