Francisco J. Ayala Quotes

Enjoy the top 5 famous quotes, sayings and quotations by Francisco J. Ayala.

“Insect resistance to a pesticide was first reported in 1947 for the Housefly (Musca domestica) with respect to DDT. Since then resistance to one or more pesticides has been reported in at least 225 species of insects and other arthropods. The genetic variants required for resistance to the most diverse kinds of pesticides were apparently present in every one of the populations exposed to these man-made compounds.”
— Francisco J. Ayala —

“It is probably fair to estimate the frequency of a majority of mutations, in higher organisms, between one in ten thousand and one in a million per gene per generation.”

— Francisco J. Ayala

“A hypothesis is empirical or scientific only if it can be tested by experience. A hypothesis or theory which cannot be, at least in principle, falsified by empirical observations and experiments does not belong to the realm of science.”

— Francisco J. Ayala

“Toby Tyrrell unravels the various formulations of Gaia and explains how recent scientific developments bring the hypothesis into question. His criticisms are insightful, profound, and convincing, but fair. On Gaia is wonderfully informative and a pleasure to read.”

— Francisco J. Ayala

Insect resistance to a pesticide was first reported in 1947 for the Housefly (Musca domestica) with respect to DDT. Since then resistance to one or more pesticides has been reported in at least 225 species of insects and other arthropods. The genetic variants required for resistance to the most diverse kinds of pesticides were apparently present in every one of the populations exposed to these man-made compounds.

— Francisco J. Ayala

“A few years ago, they [Neandertals] were thought to be ancestral to anatomically modern humans, but now we know that modern humans appeared at least 100,000 years ago, much before the disappearance of the Neandertals. Moreover, in caves in the Middle East, fossils of modern humans have been found dated 120,000-100,000 years ago, as well as Neandertals dated at 60,000 and 70,000 years ago, followed again by modern humans dated at 40,000 years ago. It is unclear whether the two forms repeatedly replaced one another by migration from other regions, or whether they coexisted in some areas”

— Francisco J. Ayala

Francisco J. Ayala Quotes Pictures

Want to see more pictures of Francisco J. Ayala quotes? Click on image of Francisco J. Ayala quotes to view full size.

Related Famous Quotes by Topics

• Readable Quotes

  “In language that is searing and lyrical, evocative and precise, this exceptional book thinks with the zombies, specters, felons, slaves, dogs, cadavers, and” — Donna J. Haraway

• Quotes About Dairy Milk

  “I was the all-American face. You name it, honey - American Dairy Milk, Metropolitan Life insurance, McDonalds, Burger King. The Face That Didnt” — Debra Winger

• Quotes About Waqt

  “Voh waqt bhee deykha taareekh kee gharion nay Lamhon nay khataa kee thee Sadiyon nay sazaa paayee (The ages of history have recorded” — Khushwant Singh

• Quotes About Plain Speaking

  “Plain speaking is necessary in any discussion of religion, for if the freethinker attacks the religious dogmas with hesitation, the orthodox believer assumes” — David Marshall Brooks

• 24 December Birthday Quotes

  “When Oscar Niemeyer died on December 5, 2012, ten days before his 105th birthday, he was universally regarded as the very last of” — Martin Filler

• You Live For Today Quotes

  “I really think that if you live for today, tomorrow takes care of itself.” — Sharon Tate

• It Is Not Easy Quotes

  “You Mabden seem to think that happiness must be bought with misery ... It is not easy for Vadhagh to understand that. We” — Michael Moorcock

• Quotes About Forgetting The Past And Moving On

  “Wanderlove is about forgetting the bad things and focusing on the good. Out with the old and in with the new ... The” — Kirsten Hubbard

• Quotes About Generation Gaps

  “They made you how they need you. They built you with all they know, and love—and so they cant see what youre not:” — Caitlin Moran

• Quotes About Aviation Engineering

  “Checklists turn out ... to be among the basic tools of the quality and productivity revolution in aviation, engineering, construction - in virtually” — Atul Gawande

• Quotes About Jedi Knights

  “It wasnt long after I began writing Star Wars that I realized the story was more than a single film could hold. As” — George Lucas

• Christmas And New Year Business Quotes

  “On Christmas. "Santa Claus represents God on assistance," said Clyde. "Santa Claus is a negative-idealed god, the pagan god of material worship," Leon” — Milton Rokeach

• Best Unsaid Quotes

  “Facts tend to take the punch out of a good hate rant and are therefore left best unsaid.” — John Ridley

• Make It Worth Your While Quotes

  “Heres something else Id like your opinion about," I said. "If he went back underground and sat down again in the same spot,” — Plato

• Try Hard Quotes

  “With my own comics, I try hard to get the vision in my head onto paper, to have one match the other as” — Gene Luen Yang