Sexually selected traits are those traits that help an organism reproduce by competing for and attracting a mate. Some examples include the plumage...
An example of sexual selection is the feathers on a male peacock. This is an example of intersexual selection as the bright feathers on the male ar...
Elephants seals use intrasexual selection, the males will compete with each other for the opportunity to find a mate. They physically battle and th...
Start studying Unit 9: Evolution OLI Quizzes. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Study with Quizlet and memorize flashcards containing terms like Which statement is true about Charles Darwin? A) He was the first to propose a hypothesis for the origin of life. B) He was the first to outline the modern theory of evolution. C) He was the first to ask questions about the origins of life. D) He was the first to publish the traditional belief of evolution., Which of the ...
There is natural variation among individual organisms within a population, meaning they are all different in some ways. This variation within the population permits flexibility and survival in response to changing environmental circumstances. Variations that increase survivability are more likely to be passed on to subsequent generations.
A few examples of sexual selection in animals are described briefly above. However, there are many other examples of both intrasexual and intersexual selection in animals.
Intrasexual selection relates to the competition between members of a species of the same sex. Generally, this refers to male-male competition for the opportunity to mate with a female. However, female-female competition also occurs. Intrasexual selection is influenced by the sex ratio in the population, resources, and any hierarchy.
When any two species are compared, biologists can find many detailed similarities in their cell structures and genetic sequences. For example, a yeast cell (fungus) has many genes and proteins that are a close match to similar structures found in human cells. How do biologists interpret such similarities?
Starting from one or a few life forms over 3 billion years ago, life has branched out. As life forms change, they tend to develop traits that aid their survival and reproduction
Each major form of life was created less than 10,000 years ago . Since then species have changed somewhat to better suit them to their environment.
A flowering shrub is introduced to North America as an ornamental plant. Beetles that normally feed on a different North American plant species begin to live and feed on the introduced shrub. Their appearance and seasonal schedule begin to shift as they adapt to feeding on the new plant host.
They are adaptations to a similar lifestyle but came from a different source because animals and fungi do not have a common ancestor.
Bacteria vary in how well they tolerate antibiotics. If a bacterial population is exposed to antibiotics, resistant individuals reproduce better and their frequency increases over time.
all individuals of a widespread species of bird, including individuals living in Asia, Africa, North America, and Australia.
When any two species are compared, biologists can find many detailed similarities in their cell structures and genetic sequences. For example, a yeast cell (fungus) has many genes and proteins that are a close match to similar structures found in human cells. How do biologists interpret such similarities?
Starting from one or a few life forms over 3 billion years ago, life has branched out. As life forms change, they tend to develop traits that aid their survival and reproduction
Each major form of life was created less than 10,000 years ago . Since then species have changed somewhat to better suit them to their environment.
A flowering shrub is introduced to North America as an ornamental plant. Beetles that normally feed on a different North American plant species begin to live and feed on the introduced shrub. Their appearance and seasonal schedule begin to shift as they adapt to feeding on the new plant host.
They are adaptations to a similar lifestyle but came from a different source because animals and fungi do not have a common ancestor.
Bacteria vary in how well they tolerate antibiotics. If a bacterial population is exposed to antibiotics, resistant individuals reproduce better and their frequency increases over time.
all individuals of a widespread species of bird, including individuals living in Asia, Africa, North America, and Australia.