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, 22.06.2019 20:50, peytondavis2424
The genetic code is essentially the same for all organisms. based on this information, one can logically assume which of the following statements to be correct? a. dna was the first genetic material. b. the same codons in different organisms translate into the different amino acids. c. different organisms have different numbers of different types of amino acids. d. a gene from an organism can theoretically be expressed by any other organism. e. all organisms have experienced convergent evolution.
Answers: 3
Biology, 23.06.2019 05:50, queeneaf
Which of the following effects does the recessive allele have in an organism which also displays a dominant allele? a. the recessive allele will turn into a dominant allele b. the gene will have a disorder c. the dominant allele will become recessive d. it has no effect
Answers: 2
(ii) Suggest why it is important to compare the change in length rather
than the final lengths of t...