How does the respiratory system interact with the circulatory system?
a.
the circulatory system removes oxygen from the body to make room for carbon dioxide in the respiratory system.
b.
the circulatory system transports oxygen that the respiratory system brings into the body.
c.
the respiratory system transports oxygen to the heart for the circulatory system.
d.
the respiratory system brings in carbon dioxide so the circulatory system can transport it throughout the body.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.

ans.

dna fingerprinting is defined as a process that determines the dna characteristics of an individual. these dna characteristics are unique among individuals as their fingerprints, so it is known as dna fingerprinting.

steps of dna fingerprinting includes extraction of dna from sample, amplification of dna, restriction digestion of amplified dna, and then analysis of dna by gel electrophoresis, respectively.

thus, the next step performed by the scientist is 'to cut the amplified dna (obtained by polymerase chain reaction) by restriction enzymes that cleave the dna into fragments and their analysis.'