Vacuoles are essentially sacs surrounded by a membrane. They are used by cells as temporary storage sites. They often store food, enzymes, and other materials needed by the cell, and some vacuoles store waste products.
use of a microscope containing improved lenses that could magnify objects almost 300-fold, or 270x. Under these microscopes, Leeuwenhoek <span>found motile objects. </span>
Answer:
B) Styrofoam is a good insulator.
Explanation:
When talking about thermal energy, or a heat, insulator is a material that doesn't allow heat to pass through easily. On the other hand, a conductor is completely the opposite, it allows, quite successfully, transfer of the heat.
So, regarding ice cream, from these definitions above, we can conclude that insulators will prolong melting time, while, in the conductors, ice cream will melt rather fast.
Looking at the table, we see that Styrofoam had the longest melting time, which makes it quite successful insulator.
Vitamin A deficiency is the leading cause of preventable blindness in children.
You eat the turkey sandwich on wheat bread with mayyonaise using your mouth the salivary gland produce a hormone to help your mouth chew and it breaking down into a pieces to ensure that it would be fit to your esophagus. then when the food enter on your esophagus a narrow long tube connected to your mouth a peristalsis a smooth tissue will help to narrow down the food towarda your stomach and then when the food reach your stomach your stomach undergo a series of reaction first your stomach breaking down the food into a little pieces and mixed it with a strong gastric juice to extract the proteins and the raw materials needed by your body (then it is different discussion for today) your stomach need to process your food up to 6 hrs of digestion after that the food will become a feces this will enter to the small intestine and to the rectum and then to the anus.
