Transcription factors control which of the following phases of pattern formation in the human embryo?
A. formation of body axes and segmentation
B. segmentation and development of segment characteristics
C. segmentation, development of segment characteristics, and cell differentiation
D. formation of body axes, segmentation, development of segment characteristics, and cell differentiation
E. cell differentiation
D. formation of body axes, segmentation, development of segment characteristics, and cell differentiation
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Read the following scenario to answer the following question. Cellular respiration converts the energy of fuel molecules to a form of energy that a cell can use to perform work. In an average day, most adult humans need to consume about 2,000 Calories to maintain their health. However, the exact amount of dietary Calories a person needs depends upon many factors, including the person's age, physical activity, size, and health. Foods that we consume vary greatly in their nutritional content and quality. A large hard-boiled egg, for example, has about 75 dietary Calories and contains about 70% of our recommended daily intake of cholesterol. If a person eats one hard-boiled egg and digests the egg fully, cellular respiration will convert most of this energy into ________.
a. carbon dioxide b. sugars c. heat d. ATP e. none of the above
Autoimmune diseases result from a breakdown in the ability of the body to____
a. produce antibodies b. produce memory cells c. destroy major histocompatibility proteins d. distinguish self from non-self e. distinguish between harmless and pathogenic microorganisms
The abundance and diversity of marine viruses are considered
a. low abundance with high diversity. b. high abundance and low diversity. c. low abundance and low diversity. d. high abundance and high diversity.
Unlike phytoplankton, which are at the mercy of currents, zooplankton can move at will within a current
Indicate whether the statement is true or false