<span>These protrusions will only bind to </span>certain<span> receptors on the host cell; they are essential for both host specificity and viral infectivity.</span>
The correct answer for the given question above would be option B. Their role in the process of digestion is the absorption of nutrients. The small intestine is covered with finger-like projections which are known as villi. These villi help in absorbing the nutrients into the blood.
Conserve energy – remember to turn off lights, computers, and electric appliances when not in use
Use energy efficient light bulbs and appliances
Participate in your local utility’s energy conservation programs
Limit driving by carpooling, using public transportation, biking and walking
Combine errands for fewer trips
Keep your automobile well tuned and maintained. Follow the manufacturer’s instructions on routine maintenance, such as changing the oil and filters, and checking tire pressure and wheel alignment.
Avoid excessive idling of your automobile
Drive electric or plug-in hybrid electric vehicles
Use electric or hand-powered lawn care equipment
Be careful not to spill gasoline when filling up your car or gasoline powered lawn and garden equipment
Run dishwashers and clothes washers only when full
Choose environmentally friendly cleaners
Use water-based or solvent free paints whenever possible and buy products that say "low VOC"
Seal containers of household cleaners, workshop chemicals and solvents, and garden chemicals to prevent volatile organic compounds from evaporating into the air
Purchase and use low-polluting outboard marine engines and personal watercraft (4-stroke and direct fuel injection 2-stroke outboard marine engines).
Advocate for emission reductions from power plants and more stringent national vehicle emission standards
