It is january and haley, sarah and becky are tired of having cold feet while waiting for the school bus to come in the morning. they decide to design an experiment to test the effectiveness of wool, cotton and nylon as insulators. they fill identical bottles with 200 ml of water at 100 c and place inside each sock. they take the temperature of the water after 20 minutes.

what is the independent variable (manipulated variable) in the following experiment?
question 2 options:

identical bottles with 200 ml of water.

the different types of sock materials as insulators.

the temperature after 20 minutes.

having cold feet.

IV: type of insulators (wool, cotton, or nylon)

DV: temperature of water

C: 200ml, water temp, 20 minutes

Explanation:

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set

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.'