In the mid-1900's the Soviet geneticist Lysenko believed that his winter wheat plants, exposed to ever-colder temperatures, would eventually give rise to ever more cold-tolerant winter wheat. Lysenko's ideas on this subject are in agreement with the ideas

TRUE or FALSE: Natural selection is a random process.

TRUE or FALSE: Evolution requires the operation of natural selection.

TRUE or FALSE: The main source of genetic variation among human individuals is the reshuffling of alleles in sexual reproduction.

The ____________________ is the chronological collection of life’s remains found in layers of rock.

List the five conditions that theoretically would completely prevent the occurrence of natural selection in a population over time?

An island has a population of 100,000 moths that has 98% grey individuals and 2% black individuals. Generation after generation, this ratio and population size remains basically the same. After a hurricane, 10,000 black moths are blown onto the island.

Charles Darwin and _________________________ independently articulated the concept of natural selection.

TRUE or FALSE: Evolution must happen whenever a population is not well-adapted to its environment.

If two species have genes and proteins with sequences that match closely, biologists conclude that the two species share a common ____________________.

TRUE or FALSE: If two modern organisms are distantly related in an evolutionary sense, then one should expect that they share fewer homologous structures than two more closely related organisms.

Mutations in a gene can lead to the development of new ______ for the gene.

Different alleles are the results of _______.

The differential contribution of offspring to the next generation by various genetic types belonging to the original population is known as ____________________.

In order to create new breeds of dogs, breeders practice ____________________ selection.

What quality must exist in a population before natural selection can act upon that population?

TRUE or FALSE: Mutations occur at random; natural selection can preserve and distribute beneficial mutations.

The creation of a new species is called ____ (a type of evolution).

A generation-to-generation change in the frequencies of alleles in a population is called ____________________.

According to Lamarck, evolution resulted from the inheritance of ____________________ traits.

What piece of evidence most strongly supports the common origin of all life on Earth?

Fossils found deep in the earth are generally ______ than the fossils found above them.

TRUE or FALSE: Evolution must happen, due to organisms' innate desire to survive.

If a population of otters is reduced dramatically in size, the population ____________________ will lead to the loss of substantial genetic variation, even if the population size recovers after a few generations.

According to Darwin’s theory of evolution, ____________________ change over time.