Nitrogen-fixing bacteria are important a. they turn nitrogen from the air into nitrogen compounds in the soil. b. they are essential for plants being able to carry out photosynthesis. c. they break up dead animals in the soil. d. they release nitrogen from the soil into the atmosphere.

Which plant has a visible leaf modification that will it conserve water in extremely dry environments?

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?

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?