This is the process by which plants or animals kept by breeders are gradually improved.
This is the process by which plants and animals in nature are gradually improved and adapted to their environment.
This is the collection of fossils found in the earth and represent a sample of creatures that have lived in the past, even the distant past.
This refers to where organisms are found to exist on the earth and, according to the author's theory, all organisms of the same species descended from the same ancestor.
Struggle for Existence
This concept is how the author describes the competition among organisms for the scarce resources provided by nature.
This is the study of the physical properties of plants and animals.
This is the study of embryos of animals.
This is the ship...
This section contains 194 words
(approx. 1 page at 300 words per page)