A scientist is investigating how the amount of available water affects plant growth in a rainforest. Although all of Earth's spheres are interconnected, which of Earth’s spheres does the scientist’s investigation focus on?

the geosphere and the hydrosphere
the hydrosphere and the biosphere
the biosphere and the geosphere
the geosphere and the atmosphere

Asnail, elodea (aquatic plant), or both were added to the tubes and they were stoppered. tubes were placed under a grow light for 24 hours and the results recorded. the test tubes were then covered for 24 hours to produce a dark environment and the results recorded. which statement best explains the change in test tube d from the light setup to the dark setup.

The instructions for making proteins come originally from

How does the study of genetic disorders such as pku biologists understand normal alleles?