Words similar to raven
Example sentences for: raven
How can you use “raven” in a sentence? Here are some example sentences to help you improve your vocabulary:
Following this line of reasoning, Peter Raven (1972) suggested more than thirty years ago that bird-pollinated flowers were predominantly red because ‘red is the only color of the spectrum that is at once inconspicuous to most insects and also an excellent “signal” of a high caloric reward for birds’.
This explanation for the evolution of red coloration in bird-pollinated flowers differs from the one proposed by Raven (1972) in a key respect.
In the Opening Remarks referred to, Raven McDavid did not actually give Sledd credit for suggesting the subject conference but the idea, of another one.
Raven's interpretation of inconspicuousness was soon transformed into invisibility; it was assumed that bees did not visit red flowers because they couldn't detect them (Proctor et al.
Of course, Possingham's model (1992) is not incompatible with birds being more efficient than bees at exploiting red flowers, and the results would be strengthened if, as has been suggested (Raven 1972; Chittka and Waser 1997), birds are better at detecting red flowers than blue ones.