Which of the following exist in a population have to undergo natural selection?
a) no mutations
b) a favorable trait
c) homologous structure
d) all the same genes

a structure that has no known function, but possibly had a function for an ancestor is known as
a) vestigial structure
b) homologous structure
c) natural selection
d) mutation

Some technological solutions to problems like global warming meet the specific needs and situations of local communities. an example from india involves converting the solid waste from cattle into clean-burning fuel for cooking. this reduces the amount of greenhouse gases, specifically methane and carbon dioxide, released into the environment from wood fires. when evaluating the feasibility of implementing this solution, computer models are used to weigh costs against benefits. what factor is least likely to impact the decision on adopting this technology?

How many types of rock can form from the rock cycle

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.