1) Since the bacteria has the ability to eat up oil it will help prevent further damage to the marine flora and fauna due to oil spills. (B)
2) Woolly Mammoth lived during the ice age as the weather became warmed their fur along with the change in their food supply may have caused their deaths. Based on the options given, shedding of fur may have helped them from going extinct.
3)Since the student wants to compare how thermal energy is transferred between spoons the best way to do that is to place an ice cube on each spoon and record the rate of melting of the cubes. Placing both spoons are room temperature and recording the change in temperature in each will not assist in answering his question. And measuring the change in the weight of the spoons after placing them in the freezer will not provide data in regards to the transfer of thermal energy.
4) Meiosis is defined as a type of cell that once it divides it results in four daughter cells, while mitosis is defined as the type of cell that results in two daughter cells and each has the same number and kind of chromosomes as the parent cell. Skin cells undergo mitosis as such, the answer is B, both characteristics represent mitosis.
5)A Punnett square is a diagram in the shape of a square that is used to predict an outcome of a cross breed. In other words, it is used to determine the probability that an offspring having a set genotype. In a Punnett square, a lower case letter indicates a recessive allele while an upper case letter represents dominant allele.
6) The Arctic is an environment that is covered in ice based on this animals are more likely to survive if they have white skin or fur as it would be easier for them to blend with the environment. Having black fur would make them stand out even more due to the environment.
7) Homozygous means that the gene has identical alleles on both homologous chromosomes. it is represented by two capital letters for a dominant trait as such, RR is the correct answer.
8) Since the question is referring to skin cancer specifically, the only option is A, avoid staying outdoors when the sun is strongest. Skin cancer is caused by a mutation in the cells in which UV light affects the cells of the skin.
9) since the chart is not given I am unable to answer the question but you mentioned that you knew the answer.
