Things around us are usually made up of combinations of elements. These combinations are called molecules. Molecules make up combinations called compounds.
Water is an example. There are 2 oxygen atoms and 1 hydrogen atom (oxygen and hydrogen are elements). Together there molecules make up H2O (water) which is a compound.
I hope this makes sense! I'm happy to answer any other questions you might have :)
One of the functions of the muscular system is pumping blood. <span>The cardiac muscles in our body control the pumping of blood throughout arteries and veins. The contraction of the heart muscle is involuntary and is controlled by the hearts own electrical system. The right side of the heart receives blood from the body and pumps it to the lungs. The left side of the heart receives blood from the lungs and pumps it out to the body.</span>
The answer you chose is correct becAuse if both parents are heterozygous for a disease that is recessive there is a 25%chance of the offspring inheriting the trait.Ex:
R r
R (RR) (Rr)
r (Rr) (rr) rr is the only outcome that can inherit the disease.
They were classified by their use.
Depending on the similarity of the plant species .
Same species usually have similar looking or have similar function of pollen
whereas different species of plant differ in method of spreading their seeds therefore their seeds differ in shape size weight etc ...
a hibiscus plant containing a flower has pollen that are small and grainy which enables it to stick to insects when they come for the juicy nectar. For a coconut tree it has seed which large in size hollow and light weight enabling it to float in water and reach another place to grow and increase their species once again
