Question

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Answer 1

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 help support the cells. < -- my coice

Which of the following best describes the relationship between the structure of the cell membrane and its function?
The cell membrane folds upon itself easily, which facilitates cellular reproduction by mitosis.
The membrane is rigid and inflexible preventing the movement of substances across the cell membrane.
The outer layer of the membrane is hydrophilic, which allows water to flow in and out of the cell easily to eliminate waste.
The proteins that are embedded in the cell membrane act as channels to transport substances in and out of the cell. < --- my choice


Runners only have enough stored ATP in their muscle cells to run for about five seconds. Which answer correctly explains how the runner’s body adjust to the longer distance, for example, a marathon (42.1 km)?

The runner's body will convert stored fat molecules into energy. < --- my choice
The runner's body will create the needed energy by breaking down proteins.
The runner's body will supply the needed energy by producing starch.
The runner's body will produce the energy by activating the Golgi apparatus.
Cellular respiration is a process involving the breakdown of glucose molecules in order to generate energy for cellular activities. Given the general reaction below, which of the following best describes the products labeled x and y?

C6H12O6 + O2 → _x___ + __y___ + energy

The products are CO (carbon monoxide) and H2O2 (hydrogen peroxide), which then decompose into carbon dioxide (CO2) and water (H2O).
The products are H2O (water) and CO2 (carbon dioxide), which then undergo anaerobic respiration.
The products are CO2 (carbon dioxide) and H2O (water), which then become the reactants for photosynthesis. < ---- my choice
The products are O2 (oxygen) and H2O (water), which are then used for growth and to keep the organism hydrated.

M. J. Schleiden shifted the scientific community's attention to cellular processes with his

attention to disproving spontaneous generation
publication of ideas on cell generation
theories on the division of cells
claim that cells were the basic unit of all plant matter < --- my choice