In the mantle/////////////////////////////////
A: In a lab a scientist measures the height of roses that received different fertilizers.
An experiment must include variables. The other three are just measurements, but since the scientist is varying the types of fertilizers used, this better describes an experiment. It is also done in a controlled environment (in a lab) which helps to eliminate other uncertainties.
One the XY belong to the male (XX is for females ) and these chromosomes are sex chromosomes and are always the same in every human being ( well except for some genetic disorders)
The tissue level or organization refers to a group of cells of the same origin that carry out a specific function. It can be viewed as a group of cells that don't necessarily make up an organ. The tissue level or organization refers to a group of cells of the same origin that carry out a specific function.
