Answer:
An inclined plane reduces the effort force by increasing the distance through which the force is applied. So the actual effort decreases and is less than the unity always. Therefore, an inclined plane reduces the effort as well as work done.
Explanation:
Answer:
Explanation:
Both parents have black color and normal vision but some of their progenies show brown color and some shows PRA, this reveals the brown coat color and PRA are recessive traits and both parents are heterozygous. The progenies include black normal vision, brown normal vision and black, PRA, that is the alleles for these genes separate independently of each other.
Let us denote the alleles as B-black, b-brown and P-normal vision, p-PRA, then the genotype of the heterozygous parent is BbPp, alleles separate independently of each other so the possible gametes are alleles for the color and vision segregate independently during gamete formation.
Thus, option C is correct.
Fire extinguishers are classified according to the type of fire. jThe A, B, and C ratings define what kind of burning materials each fire extinguisher is designed to quench.
Class B fire extinguishers are effective against flammable liquid-form fires. Examples of which are cooking oils, gasoline, kerosene and the like. There are two commonly used effective fire-fighting chemicals used in these types of fire namely monoammonium phosphate and sodium bicarbonate. The monoammonium phosphate can effectively smother the fire from these liquid combustibles while the sodium bicarbonate induces a chemical reaction to extinguish the fire.
Therefore, the Class B fire extinguishers are suitable for liquid form combustibles such as cooking oil, gasoline, kerosene or paint.
C. The cell wall provides extra support for plant cells to prevent them from bursting in hypotonic solutions.
Answer:
A
Explanation:
If a shopping mall does open it can impact the envirornment because it builds roads, uses gases, and chops down trees.
Trees- Animals need trees to grow there offspring.
Roads- Destroy dirt and add harmful chemicals
Gases- Pollute the air.
