1. 6 identical pieces of carrot were cut, weighed and put into placed in solutions of different concentrations of sugar solution. After an hour, they were removed, blotted dry and weighed again.
The change in mass was calculated. The results are shown below.
Distilled water 0.5M
1.OM
1.5M
Mass at start (8)
2.65
2.66
2.67
2.65
Mass at end (g)
2.92
2.85
2.35
1.89
a) What was the independent variable?
b) What was the dependent variable?
c) Suggest two variables that were kept the same
d) Explain why some pieces of carrot lost mass

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.

What contributes to the high level of biodiversity found in wetlands? a. the large amount of available organic matter to organisms that are food for larger organisms b. the amount of available water for organism use c. the high nutrient availability d. all of the above select the best answer from the choices provided a b c d

Asample of soil from a c horizon is light brown in color and has a high content of a mineral called feldspar. which of the following statements is most likely true