Select all the correct answers.

a colorimeter is an instrument used for chemical analysis by comparing a liquid’s color with standard colors. in an experiment, a scientist used two colorimeters and noted the readings. the first colorimeter showed consistent readings that were five points lower than the actual reading. the second colorimeter provided readings that were the same as the actual reading. which two statements are implications of these readings?

a) the first colorimeter is reliable but not valid.

b)the second colorimeter is valid and reliable.

c)both the colorimeters are reliable and valid.

d)the readings of the first colorimeter can be used without repeating the experiment.

e)the readings of the second colorimeter aren’t reliable and can’t be used for the experiment.

The first colorimeter (i'm guessing is standard) is less exact then the actual reading, and has a harder time pin-pointing. (it gives a number near the actual temperature, but it is not correct.)

The second colorimeter is exact, and should be 'trusted more in the future', because it gives an accurate reading of the current temperature.

these are the 2 conclusions i got from the top information given to me.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.