2. Cells in a developing embryo respond to substances that stimulate them to go through the cell cycle without
entering Go in order to form many new cells quickly. These substances are produced from the instructions in
oncogenes. Oncogenes are turned off as organisms mature.
What results if the oncogenes are reactivated later during growth and development?

How does land development destroy ecosystems? it increases human carrying capacity too rapidly. it converts them into residential or agricultural areas. it forces humans to import non-native plants and animals. it expands the natural range of native wildlife species.

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

The galapagos island contain 13 species of finches four of the species are seen here it is believed that all of the species had one common ancestor and overtime