In his book On the Origin of the Species, Charles Darwin described how species change over time. Which of the following is NOT part of his observations that describes the mechanisms of natural selection? Group of answer choicesDisease and natural disaster will limit population growth.Species today descended with modifications from ancestral species.Organisms produce more offspring than can survive.Organisms with advantages will survive and reproduce.

Which of the following is a true statement about Charles Darwin?Group of answer choicesHe based his theory on the inheritance of acquired characteristics.He was the first to discover that living things can change, or evolve.He proposed natural selection as the mechanism of evolution.He worked out the principles of population genetics.

Darwin's theory of natural selection has long been a guiding light for explaining changes in species over time. These changes happen for a number of reasons and are usually based on selective pressure.Which of the following examples is NOT an instance of natural selection?Elimination ToolSelect one answerAA group of giraffes stretching their necks in order to reach more leaves to eat.BA shift in the coloring of beetles over time to blend in with the leaves.CMore nocturnal mice in an area over time due to the presence of daytime predators.DA group of gophers getting smaller over time because they can hide in caves from predators.

Because he was well aware of the effect his theory of evolution would have on the public and on the Church of England, Darwin delayed publishing his work for several decades while he gathered additional evidence. After invoking selective breeding of domesticated species as evidence that groups of organisms are capable of change, he then proposed that natural populations can change as well. On which two lines of evidence did he base this proposal?Group of answer choicesOrganisms within a population vary, and all populations produce more offspring than can be supported by the environment, resulting in competition for survival within the population.Organisms produce more offspring than can be supported by their environment, and adaptations to specific environments increase an organism's ability to survive and reproduce.Some individuals leave more descendants than other individuals, but the individuals in a population are essentially identical to each other.Some individuals within a population have greater survivability and reproductive success than others, and favorable traits within a population will accumulate over generations. PreviousNext

How did Darwin explain the process of natural selection?a. Traits acquired during an organism's lifetime are passed on to offspringb. Individuals with unfavorable traits are more likely to survivec. Offspring inherit helpful traits that lead to better adaptationd. Overproduction of offspring ensures survival of the species

Darwin's development of natural selection was influenced by the writings of the economist Thomas Malthus, who noted thatGroup of answer choicesspecies change as their environment changes.there is a great deal of variation in nature.many organisms will not survive to adulthood.economic competition is analogous to survival of the fittest.