Shared Genes: Why Humans & Prokaryotes Share 1000?

All the organisms on your campus make up a. an ecosystem. b. a community. c. a population

Which of the following best demonstrates the unity among all organisms? a. identical DNA sequences b. descent with modification c. the structure and function of DNA

A controlled experiment is one that a. proceeds slowly enough that a scientist can make careful records of the results. b. tests experimental and control groups in parallel. c. is repeated many times to make sure the results are accurate.d. keeps all variables constant. e. is supervised by an experienced scientist

Which of the following statements best distinguishes hypotheses from theories in science? a. Theories are hypotheses that have been proved. b. Hypotheses are guesses; theories are correct answers. c. Hypotheses usually are relatively narrow in scope; theories have broad explanatory power. d. Hypotheses and theories are essentially the same thing. e. Theories are proved true; hypotheses are often falsified.

Which of the following is an example of qualitative data? a. The temperature decreased from 20C to 15C. b. The plants height is 25 centimeters (cm). c. The fish swam in a zigzag motion. d. The six pairs of robins hatched an average of three chicks. e. The contents of the stomach are mixed every 20 seconds.

Which of the following best describes the logic of scientific inquiry? a. If I generate a testable hypothesis, tests and observations will support it. b. If my prediction is correct, it will lead to a testable hypothesis. c. If my observations are accurate, they will support my hypothesis. d. If my hypothesis is correct, I can expect certain test results. e. If my experiments are set up right, they will lead to a testable hypothesis

With rough sketches, draw a biological hierarchy similar to the one in Figure 1.3 but using a coral reef as the ecosystem, a fish as the organism, its stomach as the organ, and DNA as the molecule. Include all levels in the hierarchy.

Based on the results of the mouse coloration case study, suggest another hypothesis to extend the investigation

In a short essay (100150 words), discuss Darwins view of how natural selection resulted in both unity and diversity of life on Earth. Include in your discussion some of his evidence. (A suggested grading rubric and tips for writing good e

A typical prokaryotic cell has about 3,000 genes in its DNA, while a human cell has about 20,500 genes. About 1,000 of these genes are present in both types of cells. Based on your understanding of evolution, explain how such different organisms could have this same subset of genes. What sorts of functions might these shared genes have?