Answer:
Explanation:
The immune system responds to antigens by producing cells that directly attack the pathogen, or by producing special proteins called antibodies. Antibodies attach to an antigen and attract cells that will engulf and destroy the pathogen. The main cells of the immune system are lymphocytes known as B cells and T cells.
The answer is glucose. Ready energy for any type of cell is glucose. Other molecules may be used for energy, but they are broken down before being used as an energy source. DNA is not used for energy; proteins are used only when an organism is in starvation mode.
B.They can change the distance over which you apply a force.
C.They can change the direction in which you apply a force.
D.They can change the amount of force you exert.
this is science
The correct answer is B. They can change the distance over which you apply a force.
The incorrect statement about simple machines is A. They can change the amount of work done on an object. Simple machines do not change the total amount of work; instead, they offer a mechanical advantage by changing the force and distance relationship.
The statement that is not true of simple machines is:
A. They can change the amount of work done on an object.
Simple machines are designed to make work easier by changing the force and distance relationship. However, they do not change the amount of work done on an object because the product of the force applied and the distance over which it is applied (work) remains constant, according to the law of conservation of energy. A simple machine can change the direction of the force, change the amount of force exerted, and change the distance over which the force is applied, which are the benefits of its mechanical advantage.
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Answer:
hydrogen ion
Explanation:
A hydrogen ion is created when a hydrogen atom loses or gains an electron. A positively charged hydrogen ion (or proton) can readily combine with other particles and therefore is only seen isolated when it is in a gaseous state or a nearly particle-free space.
B. 25% of the area is vegetation and 75% is roofed or paved
C. 50% of the area is vegetation and 50% is roofed or paved
D. All of the above will have the same runoff
Answer: The correct option is B. 25% of the area is vegetation and 75% is roofed or paved.
Vegetation can cause precipitation and reduce runoff. Leaves and stems are used in capturing rain and prevents the rainwater to reach the ground. Dense vegetation with higher surface area under vegetation absorbs water and prevents runoff. Pavements or roofs cause the runoff water by filling the waterways as there is no vegetation for water absorption which leads to overfilled waterways and in turn cause flooding.