Which of the followings a defining characteristic that was common to all protocells (protbionts)? a. they possessed the ability to replicate DNA
b. they had simple organelles (e. g., mitochondria)
c. they were all autotrophs
d. had a membrane or membrane-like structure separating the inside from the outside
e. they all had a cell wall made of peptidoglycan

Coral reefs support more species per unit area than any other marine environment on earth. what is one way coral reefs are important to the health of the biosphere

State officials are considering constructing a road through a forested wilderness area. this action will likely affect the forest ecosystem in various ways. part a: predict how the construction of a road could negatively affect plants and animals in that ecosystem. (3 points) part b: describe one way that the construction of a road could have a positive impact of the forest ecosystem. (1 point)

Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs