Why was the transition from "purple bacteria" to "green bacteria" important for the evolution of complex organisms? Use evidence from the video and the chart in your answer.

An atom of element A has 27 protons. What would the element's atomic number be?

A few unidentified seeds were found in a sealed clay jar during an archaeological dig. radiocarbon dating showed that the seeds were 725 years old. when the seeds were planted, plants grew from them.

Extreme temperature changes or increased moisture speed up the weathering rate.

There is only 2 genders male and female. If you can not deal with it go cry to your horrible sense of truth.

Which of the following structures would you expect to find in a single-celled organism? A. internal organs B. legs and feet C. outer covering D. large brain

Which u. s. states are most likely to oppose strict permit requirements under the Clean Air Act

In a text area below compare and contrast a cell membrane and a cell wall

Which is an advantage of sexual reproduction? a. two parents are required. b. only one parent is required. c. it leads to genetically diverse offspring. d. it leads to genetically identical offspring.

How are three different types of consumers alike and how are they different

What do a door and a venus flytrap leaf have in common