Population ecology is the study of how populations — of plants, animals, and other organisms — change over time and space and interact with their environment. Populations are groups of organisms of ...

Researchers have uncovered a cell-intrinsic mechanism, that controls the appropriate number of T cells in the organism and thus ensures that the immune system functions properly. This mechanism has ...

When environments change again and again, evolution surprises—and one population doesn’t reveal a whole species ...

Over a single day, in the placid waters of a single pond, a million virus particles might enter a single-celled organism known for the minuscule hairs, or cilia, that propel it through those waters.

PART 1: THE HISTORICAL FRAMEWORK: EVOLUTION AS SCIENCE: Before Darwin -- Darwin and natural selection -- The arguments and the evidence for evolution -- PART 2: ORIGINS: THE ENORMITY OF TIME: The ...

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