Week 1
2
3
4
5
6
7
8
Height of plants grown in
sterilised soil (cm)
0,8
1,5
2.0
2,3
2,4
3,8
5,0
6,0
Height of plants grown in
non-sterilised soil (cm)
2,0
5,5
8,7
10,0
12,0
16,2
19.1
25,0
2.4.1
Define mutualism.
(1)
2.4.2
Describe the mutualistic relationship between the fungus and the
plants.
(2)
2.4.3
Identify the:
(1)
(a) Independent variable
(1)
(b) Dependent variable
i l
2.4.4
Describe ONE way in which the scientists ensured that the results
of this investigation are valid.
(1)
2.4.5
Use the data in the table above to draw two line graphs on the
same set of axes.
(6)​

3 is cell membrane, 5 is nucleoid and 6 is plasmid.

Explanation:

Structure 3 is cell membrane, structure 5 is nucleoid and structure 6 is plasmid. The structure 4 is cell wall which function is to protect the bacterial cell from outside environment.  Bacteria develop resistance to antibiotics due to mutation which change its features. The same type and regular use of antibiotics leads to develop resistance in the bacteria. Plasmids can be used in the production of insulin for diabetics because plasmid has the ability to produce many copies of certain genes.

the correct answer is: d. the saltine and pretzel are made of flour, yeast, and baking soda, and salt. the pecan contains no flour but it does contain fats. the pecan is a nut that can be consumed as a healthy snack. first of all, pecans are a source of fat (monounsaturated fat), but they provide less fat than some other nuts. pecans are a rich source of dietary fiber, manganese magnesium, phosphorus, thiamin, vitamin e…

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."