Which of the following statements is true?
a. Most bacterial species can be cultured in the lab.
b. All bacterial species require the same essential nutrients.
c. All organisms require carbon as a macronutrient.
d. Bacterial species use a limited number of nutrient sources.

When analyzing tree rings, what do scientists assume a thin ring indicates?

Sediment layers stop lateral spreading when: they encounter a barrier they encounter an opposing current they run out of additional sedimentary material

In 1992, hurricane andrew left a wake of destruction through florida. one victim of the storm was a reptile-breeding facility. over 900 burmese pythons were set free, and today thousands of pythons live in florida. these pythons are an invasive species, or a harmful species not native to the region. 1. what impacts do you think the burmese pythons might have on local ecosystems