When plants wilt, their soft stems and leaves begin to droop. what is going on inside the plants' cells that causes plants to droop like this? ` the cell membranes begin to come apart when there is insufficient water around the cells. `the cytoplasm of the cells becomes more concentrated, which slowly poisons the cells. ` the cell walls become brittle as they dry out, and some of them collapse. ` the central vacuoles in the cells lose water and can no longer support the cells.

What is called the "building block" of life?

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.