Many cacti do not have leaves but rather have oversized stems. what role of leaves is therefore taken on by the stems of cacti?
a. they absorb water and nutrients from the soil.
b. they transport materials throughout the plant.
c. they store excess water.
d. they produce food by photosynthesis.

Has magnification ability of hundreds of thousands of times

Aremote community desperately needs more electrical energy. it is located in an area with the following characteristics: average wind speed of 15 – 20 km/hr some medium-sized rivers with slow-moving currents few coal deposits some oil exploration being conducted within 400 miles based on the above information, which energy source would be the most economical and safest for the community to pursue? a. fossil fuel b. hydroelectric c. nuclear d. wind

Chitin is a chemical component of the cell walls