Quotes by Ernst Mayr

Ernst Mayr

A new species develops if a population which has become geographically isolated from its parental species acquires during this period of isolation characters which promote or guarantee reproductive isolation when the external barriers break down.

Character

Population

Science

A species consists of a group of populations which replace each other geographically or ecologically and of which the neighboring ones integrate or hybridise wherever they are in contact or which are potentially capable of doing so (with one or more of the populations) in those cases where contact is prevented by geographical or ecological barriers.

Groups

Population

Science

A species is a reproductive community of populations reproductively isolated from others that occupies a specific niche in nature.

Community

Nature

Science

According to the concept of transformational evolution, first clearly articulated by Lamarck, evolution consists of the gradual transformation of organisms from one condition of existence to another.

Evolution

Firsts

Transformation

All interpretations made by a scientist are hypotheses, and all hypotheses are tentative. They must forever be tested and they must be revised if found to be unsatisfactory. Hence, a change of mind in a scientist, and particularly in a great scientist, is not only not a sign of weakness but rather evidence for continuing attention to the respective problem and an ability to test the hypothesis again and again.

Forever

Mind

Science

anyone who writes about “Darwin’s theory of evolutionin the singular, without segregating the theories of gradual evolution, common descent, speciation, and the mechanism of natural selection, will be quite unable to discuss the subject competently.

Common

Society

Writing

As a consequence, geneticists described evolution simply as a change in gene frequencies in populations, totally ignoring the fact that evolution consists of the two simultaneous but quite separate phenomena of adaptation and diversification.

Ignoring Facts

Population

Two

Biology can be divided into the study of proximate causes, the study of the physiological sciences (broadly conceived), and into the study of ultimate (evolutionary) causes, the subject of natural history.

Causes

Science

Study

Definitions are temporary verbalizations of concepts, and concepts- particularly difficult concepts- are usually revised repeatedly as our knowledge and understanding grows.

Definitions

Difficult

Understanding

Every politician, clergyman, educator, or physician, in short, anyone dealing with human individuals, is bound to make grave mistakes if he ignores these two great truths of population zoology: (1) no two individuals are alike, and (2) both environment and genetic endowment make a contribution to nearly every trait.

Mistake

Physicians

Two

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Acceleration

Atheism

Atheist

Believe

Biology

Branches

Brotherhood

Causes

Character

Civilization

Common

Community

Criticism

Curiosity

Definitions

Development

Different

Difficult

Discovery

Diversity

Doe

Earth

Events

Evidence

Evolution

Example

Facts

Feels

Firsts

Forever

Fossils

Found

Friendship

Gaps

Generations

Giving

Glowing

Groups

Hands

Heuristics

Honesty

Ideas

Ignoring Facts

Important

Isolation

Issues

Language

Life Is

Littles

Location

The Future Blueprint

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The Home Therapist: Anti Anxiety

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Quotes by Ernst Mayr

Ernst Mayr

A new species develops if a population which has become geographically isolated from its parental species acquires during this period of isolation characters which promote or guarantee reproductive isolation when the external barriers break down.

A species is a reproductive community of populations reproductively isolated from others that occupies a specific niche in nature.

According to the concept of transformational evolution, first clearly articulated by Lamarck, evolution consists of the gradual transformation of organisms from one condition of existence to another.

anyone who writes about “Darwin’s theory of evolutionin the singular, without segregating the theories of gradual evolution, common descent, speciation, and the mechanism of natural selection, will be quite unable to discuss the subject competently.

As a consequence, geneticists described evolution simply as a change in gene frequencies in populations, totally ignoring the fact that evolution consists of the two simultaneous but quite separate phenomena of adaptation and diversification.

Biology can be divided into the study of proximate causes, the study of the physiological sciences (broadly conceived), and into the study of ultimate (evolutionary) causes, the subject of natural history.

Definitions are temporary verbalizations of concepts, and concepts- particularly difficult concepts- are usually revised repeatedly as our knowledge and understanding grows.

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