Calcite-secreting organisms such as and live in the ocean’s sunlit surface waters and form the basis of most marine food webs.

A. coccolithophores; foraminifers
B. diatoms; foraminifers
C. diatoms; radiolarians
D. coccolithophores; radiolarians

Flock x flock y flock z total pieces of food eaten (from previous page) 147 93 60 food percentage* % % % simulated number of birds in flock for 3rd generation** * divide each flock's total pieces of food by 300, the total number of pieces of food eaten. ** multiply the food percentage for each flock by the total number of birds (30).

Categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. makes predictions

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.