Origins and Evolution of Life

True (A)

False (B)

<p>Reproductive isolation. (A), Geographic isolation. (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

Life began through chemical evolution that formed the first cell over about one billion years.

The process where life evolved from single-celled prokaryotes to multicellular organisms over 3.7 billion years.

Evidence from fossils, ice drills, and analyses that shows the history of life, although incomplete.

Change in a population’s genetic makeup over time leading to adaptations.

Small genetic changes in a population over time due to mutations and recombination.

The total collection of genes in a population, which evolves with mutations and reproduction.

Process where traits improving survival become more common through differential reproduction.

Heritable traits that enhance survival and reproduction in specific environments.

The presence of multiple alleles in a gene pool, allowing evolution and adaptation.

Change in populations of two species as they interact over time, affecting each other's evolution.

A species' role in its ecosystem, including its adaptations and interactions.

Species with broad ecological roles and adaptability to various environments.

Species with narrow ecological roles, requiring specific habitats and making them vulnerable to changes.

Normal rate of extinction occurring continuously, usually low-level.

A catastrophic event causing a significant rise in extinction rates, affecting many species.

Formation of new species due to geographic isolation of populations.

New species arise within the same geographic area due to behavioral or genetic changes.

Rapid evolution of multiple new species to fill ecological niches after a mass extinction.

Manipulating an organism's genes to change its traits and characteristics.

Organisms whose genetic material has been altered using genetic engineering techniques.

Human-driven selection of traits in organisms, often seen in farming and breeding.

A barrier that prevents members of two different species from producing fertile offspring.

Alterations in the environment that require species to adapt, migrate, or risk extinction.

The rate at which a population can reproduce, impacting its ability to adapt to changes.

Concerns regarding the implications and consequences of manipulating genetic material.

Human evolution is influenced by two key adaptations: a complex brain and opposable thumbs.

Continued evolution influenced by human activities, artificial selection, and genetic engineering.

The decline in species variety due to human activities leading to extinction.

Involves systematic testing and adaptation of genetic changes but comes with uncertainties.