Organisms require ----- and ------ to maintain themselves, grow and reproduce. a. DNA; energy b. food; sunlight c. nutrients; energy d. DNA; cells
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Organisms require ----- and ------ to maintain themselves, grow and reproduce.
a. DNA; energy
b. food; sunlight
c. nutrients; energy
d. DNA; cells
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- In 2005, researcher Woo-suk Hwang reported that he had made immortal stem cells from human patients. His research was hailed as a breakthrough for people affected by degenerative diseases, because stem cells may be used to repair a person's own damaged tissues. Hwang published his results in a peer-reviewed journal. In 2006, the journal retracted his paper after other scientists discovered that Hwang's group had faked their data. Does the incident show that results of scientific studies cannot be trusted? Or does it confirm the usefulness of a scientific approach, because other scientists discovered and exposed the fraud?What does selective mean ? In biologyYou are now ready to complete the first task about Choices in Biology. In this Activity you have collected details about the consequences of a heavy metal pollutant on human health. You have also identified a cellular biotechnology that uses a microorganism in removing it. Your task is to research one heavy metal endocrine disruptor or heavy metal neurotoxin that affects humans. Using good Self-Regulation skills, you may choose to research the same heavy metal you have been describing in this Activity. Alternatively, review some of the other heavy metals from the class discussion. You may find that the effect of the heavy metal you can describe the best is not the first one you began researching. As you continue your research, keep track of your sources. The important details to collect are: What is the environmental source of the heavy metal? What are the symptoms of being exposed to this heavy metal endocrine disruptor or heavy metal neurotoxin? What gland, hormone or neuronal…
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- FOR THE FOLLOWING STUDIES, WRITE A NULL HYPOTHESIS.-You want to test whether birth control pills increase a woman’s chances of getting breast cancer. -You are interested in discovering if cattle grazing in grasslands alters the plant species that grow in those grasslands. -You want to study whether tomatoes are grown organically (without chemical pesticides and fertilizers) have greater vitamin content than tomatoes grown conventionally (with chemical pesticides and fertilizers).A team of researchers is interested in testing the amount of oxygen gas (O2) produced when the same species of plant is exposed to different colors of visible light. The research team has developed a hypothesis to test and designed experimental conditions to run. They have submitted the work to you for feedback and approval. Your job is to provide feedback concerning both the hypothesis and the experimental design. This will enable them to make the necessary changes to obtain approval for their research. The Team’s Hypothesis: The levels of oxygen gas will be higher for plants exposed to visible red light. How would you improve the hypothesis while also putting it into a proper hypothesis with an IF and THEN statement?Which of the following is NOT a fundamental characteristic of life? a.) Ability to communicate with other members of the same life form b.) Ability to utilize energy derived from the external environment c.) Ability to adapt to changing environments d.) Ability to regulate the internal environment of the life form