Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

911 results
  1. ... and how they protect their pollen; role of bees in pollen ‘transfer; poor man's orchid which catapults its pollen when insect alights; lupin flower whose pollen paste is pushed forward by a piston to strike body of bee seeking nectar; snapdragon; meadow sage. Members of composite ...
  2. NLM Digital Collections - The descent of man, and selection in relation to sex 
    Publication: New York : D. Appleton and Company, 1898
    ... 495. ——, Hermann, emergence of bees from pupa, 217 ; pollen-gathering of bees, 232 ; proportion of sexes in bee-', 258 ; courting ...
  3. ... of the pistil? Would the stigma receive the pollen as the bee goes into the corolla tube or as it ...
  4. ... of vegetable generation*. By robbing plants of their pollen, do not bees con- tribute not a little to that vast ... urged in support of this conjecture. To the pollen of vegetables and the labours of the bees mankind are indebted for a very important arti- ...
  5. ... of vegetable generation*. By robbing plants of their pollen, do not bees contri- bute not a little to that vast ... precise nature of the matter by which the pollen is converted into wax, in the stomach of the bee. Experiments will, in all probability, show, that the ...
  6. ... vegetable genera- tion. By robbing plants of their pollen, do not bees contribute not a little to that vast variety ... urged in support of this conjecture. To the pollen of vegeta- bles and the labour of the bees, mankind are indebted for a very im- portant ...
  7. ... plant ess) 1 (Pr Spm/pr +) © “ae 3, “bee From pollen = cultures 6880 and 6881, table :» From self-pollinated ...
  8. ... plant ess) 1 (Pr Spm/pr +) © “ae 3, “bee From pollen = cultures 6880 and 6881, table :» From self-pollinated ...
  9. ... The flowers do not secrete nectar but the bees are attracted by pollen in the open flower head and the pollen ... actual speed. Model shown with stigma Projecting, model bee again visits it carrying pollen on its body from another flower. GERMINATION—-PHOTOMICROGRAPH ...
  10. ... one time sup- posed to be merely the pollen of plants elaborated by bees. Bonnet, however, so early as 1768, asserted it ... assertion. The latter writer, indeed, proved that the pollen is not at all essential to the production of wax, for bees fed on honey and waler equally secreted it, ...
first · previous · 1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10 · next · last