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.

The diagram illustrates the activity of vesicles during a cellular process.

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a. earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c. earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.