5. The family tree below shows the trait of having attached earlobes. Having attached earlobes is
recessive, and having detached earlobes is dominant. People with attached earlobes are shaded in

a) Describe the sex and characteristics of the person labeled A.

b) Describe the genotype of the person labeled B.

c) Describe the genotype of the person labeled C.

d) Could the person labeled D have a recessive allele? Explain.

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Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Using meiosis, the sporophyte produces spores that are .