Answer:
B
Explanation:
any loose jewelry can fall into the food or get stuck in anything while prepairing the food
Answer:
A. Independent variable 2. dominant tree species
B. Dependent variable 3. tree survival rate after the fire
C. Controlled variable 1. thinning or no thinning before the fire elevation of the site
Explanation:
A. An independent variable doesn't undergo changes during the experiment because it is not conditioned by other variables in the experiment. In this example, dominant tree species represent a variable that is independent of the experiment itself.
B. A dependent variable is those that you need to measure and depends on the other factors in the experiment. In this example, tree survival is dependent on the factors that affect the results (i.e. humidity in the trees, presence of resinous material in the trees that are non-combustible, etc.)
C. A controlled variable is those that we use to observe an expected outcome in the experiment and therefore it is used to compare with the test group. In this case, thinning or no thinning are used as positive and negative controls, respectively, because they enable their comparison with the test group in the experiment.
Answer:
AaBb
Explanation:
<u>Cross between true breeding strains</u>
Parents: AAbb x aaBB
Gametes: Ab aB
The F1 is homogeneous: AaBb.
<u>To obtain the F2 generation we must do a cross between 2 F1 individuals</u>: AaBb x AaBb
Their genotypes are the same, so they both will produce the same type of gametes: AB, Ab, aB and ab.
If you do a Punnett Square, you can check the ratio of genotypes of the F2, and that the "4" refers to AaBb.
Answer:
OA increased soil aeration due to an increase in earthworm populations.