A student observes a leaf epidermis under a microscope. it has many stomata but they all appear closed. this epidermis was most likely from:

3. If a plant cell was placed in a solution which was HYPOtonic to the salinity of the cell itself, what would be the expected reaction? a. Water enters the cell c. Water released from central vacuole b. Water exits the cell d.

Walking through the woods, you come upon a patch of ferns. You notice small, scabby-looking brown dots on the underside of the fronds. What are they, and what is their function?

If the metabolism of a cell suddenly slowed down so that there was less cellular energy available, which role of the cell membrane would you expect to be most affected?

During an anatomical class, Dr. Hales removes the heart of a frog and places it in a beaker of oxygenated Ringer's solution.

Match the characteristics below to either seedless or seed plants. vascular plants only bryophytes and pteridophytes reproduce by spores gymnosperms and angiosperms vascular or nonvascular plants monocots and dicots

Which human activity has had the greatest impact on climate change? A. deforestation B. burning fossil fuels C. production of nuclear waste D. building skyscrapers

How long can food that requires time-temperature control be left in the danger zone? A. A maximum of 3 hours B. A maximum of 4 hours C. A maximum of 1 hour D. A maximum of 2 hours

Explain the characteristics of this soil sample that likely allowed Judy to make this identification. Include particle size and texture in your response.

Rick uses an electronic air sampler to determine the amount of dangerous chemicals in the air. Which functions of the air sampler confirm that it is an electronic tool? Check all that apply. It collects chemical data.

Prokaryotic cell lacks membrane - enclosed structure is called?