Biology, 30.06.2021 07:10 jasontbyrer
(ii) Suggest why it is important to compare the change in length rather
than the final lengths of the potato stick in this type of investigation.
.. (1)
(iii) Identify one source of error with the method and suggest an
improvement
errer
improvement
[2]
(b) Another investigation was carried out into the effect of different
concentrations of sucrose solution on potato sticks.
In this investigation students decided to measure the change in mass
rather than the change in length.
The students followed a similar method to the one in 3(a) but they left
the potato sticks to soak for three hours instead of 30 minutes.
(i) The students dried the potato sticks on paper towels before
measuring the mass of each potato stick.
Suggest why this step was not important in the investigation
described in 3(a), where length was measured.
Answers: 1
Biology, 21.06.2019 15:30
Sammi is studying the interaction of the digestive and circulatory systems in the human body. she has listed various processes that occur in each of the systems. put the processes in order to describe the interaction between these two systems. tiles nutrients diffuse through the villi of the small intestine.digestive processes break nutrients down in the mouth, stomach, and small intestine.blood is pumped through the circulatory system to deliver nutrients to other organs.nutrients are ingested at the mouth.nutrients enter the capillaries of the circulatory system. sequence
Answers: 2
Biology, 22.06.2019 04:30
Types of scientific inquiry that biologist engage in that cannot be completely controlled
Answers: 1
Biology, 22.06.2019 15:20
Suppose a particular species of tulip plant has three alleles for the gene that codes for flower color. the cr allele produces red tulips, the cp allele produces purple tulips, and the cw allele produces white tulips. cr is dominant over cp and cw, and cp is dominant over cw. for each of the following crosses, determine the expected ratio of offspring for each flower color. cr cp x cp cw cr cw x cp cw 1 red: 1 purple : 0 white, 1 red: 2 purple: 1 white, 2 red: 1 purple 1 white, 1 red: 3 purple : 0 white, 2 red: 0 purple : 2 white, 2 red: 2 purple : 0 white
Answers: 2
(ii) Suggest why it is important to compare the change in length rather
than the final lengths of t...
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