Which of the following best describes a species?

a group of closely related organisms that can produce viable or fertile offspring

a group of closely related organisms that can not produce viable/fertile offspring

a group of closely related organisms that cannot produce any offspring

a group of distantly related organisms that can produce infertile offspring

Which element is found in both dna and proteins

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.

Which is an innovation of gymnosperms? gymnosperms are the first seed plants. gymnosperms are the first flowering plants. gymnosperms are the first vascular plants. gymnosperms are the first spore plants.