The wing of the bat and the fore-limb of the dog are said to be homologous structures. This indicates that:
Which of the following best represents Lamarck's ideas on the evolutionary process?
Select ALL (4) of the vestigial organs from the options below.
Choose the appropriate term from the following pairs: A butterfly wing and a bird wing are examples of ____________________________ structures because they ____________ arise from a common ancestor.
Evolution of one or more closely related species into different species; resulting from adaptations to different environmental conditions.
Which of the scenarios below are describing directional selection?
Which of the options below best describes the theory "the inheritance of acquired characteristics"?
According to Darwin's theory of natural selection, individuals who survive are the ones best adapted for their environment. Their survival is due to the
Which statement about the members of a population that live long enough to reproduce is consistent with the theory of natural selection?
A species of bird ate many types of seeds, each type coming from a different species of tree. The birds' beaks varied in size, with some individuals having slightly smaller beaks and others having slightly larger beaks.
A few years went by without much rain, and the only species of tree that survived had large seeds. Many generations later, almost all the birds had the slightly larger beaks. How is this best explained?
Moths are a type of insect similar to butterflies. A species of moth lived in a forest made up of a mixture of dark- and light-colored trees. Some of the moths were dark-colored and some were light-colored. The coloring of these moths is inherited from parent to offspring. The dark moths were hidden from predators on the dark trees, and the light moths were hidden on the light trees.
When the light-colored trees were killed by a disease, the forest was suddenly made up almost entirely of dark-colored trees. Generations later, almost all the moths had the dark coloring. Which of the following gives a correct explanation?
Determine which of the types of evidence of evolution are being explained below.
"Changes in a population over time due to reproductive preferences"
Large grassland birds, such as emus and ostriches, are examples of __________________ evolution. They have wings, but do not have a similar bone structure to birds that fly (analogous structure).
What is "fitness" of an organism?
Which type of selection selects TOWARDS recessive and dominant phenotypes, and AGAINST the intermediate phenotype.