What percentage of animals on earth are vertebratesa.5b.25c.50d.90

Which best summarizes the finding of avery? a. some traits are recessive. b. humans reproduce sexually. c. dna is a transforming factor. d. traits cannot be inherited.

Which statement correctly describes a way that mutations increase the likelihood that a species will survive in a changing environment

Which greenhouse gas is emitted when burn fossil fuels for energy? a.nitrogen b.oxygen c.carbon dioxide d.helium