Which of the following is the strongest piece of evidence for why some scientists believe that we are at the start of a sixth mass extinction?

Read the following scenario to answer the following questions.The earliest cells detectable in fossils were different from the cells in animals, plants, fungi, and protists living today. These first prokaryotic cells gave rise to eukaryotic cells approximately 1.7 billion years ago. The structure of eukaryotic cells today suggests how they might have evolved from their prokaryotic ancestors. Scientists examining mitochondria and chloroplasts now think that these organelles were probably free-living prokaryotes before becoming a part of eukaryotic cells long ago.Which of the following is a characteristic of mitochondria that suggests that they might have evolved from free-living bacteria?

Match the following with the appropriate term:

The word “theory” in theory of evolution is best replaced by ________.

A period of mass extinction is often followed by ________.

You are attempting to link an individual to a crime. The only evidence you have is a tiny drop of blood. How can you use this drop of blood to definitively make the association?

Which of these is a type of posttranscriptional regulation of gene expression?

Please read the following scenario and then answer the following questions.Molecular biologists have perfected DNA fingerprinting so that it is possible to use the technique to provide evidence to solve crimes and even identify a child’s parents. Recently, a U.S. immigrant asked the U.S. Citizenship and Immigration Services for permission to have her young daughter who was living with grandparents in their homeland join her in the United States. Her request was denied because there was an apparent mix-up with the child’s birth certificate and it could not be used as proof of maternity. Other forms of proof are required in cases such as this. The mother requested DNA fingerprinting to show that she was the mother of the daughter. Samples of DNA were taken from the mother (Mom) and the daughter (D2) as well as from her daughter (D1) and her son (S) living in the United States with her. STR analysis was run on the three samples, and the results are shown below.  The results indicate that ________.

If adenine makes up 30% of the bases in a DNA double helix, what percent of the bases is guanine?

Please read the following scenario and then answer the following questions.Molecular biologists have perfected DNA fingerprinting so that it is possible to use the technique to provide evidence to solve crimes and even identify a child’s parents. Recently, a U.S. immigrant asked the U.S. Citizenship and Immigration Services for permission to have her young daughter who was living with grandparents in their homeland join her in the United States. Her request was denied because there was an apparent mix-up with the child’s birth certificate and it could not be used as proof of maternity. Other forms of proof are required in cases such as this. The mother requested DNA fingerprinting to show that she was the mother of the daughter. Samples of DNA were taken from the mother (Mom) and the daughter (D2) as well as from her daughter (D1) and her son (S) living in the United States with her. STR analysis was run on the three samples, and the results are shown below.  STR analysis can also be used for crime scene investigations in addition to maternity testing. Suppose that the results for the Mom were found at a crime scene, that the daughter’s and the son’s results were from possible suspects, and that each of the DNA markers in the gel was an STR marker. Would these results be enough to convince a jury that the results from the daughter matched the crime scene DNA (Mom)?