A medical researcher experimented with the effects of calcium intake on the healing time of broken bones. People who had
similar broken bone injuries were divided randomly into two groups, one of which received a calcium supplement and one of
which received a placebo. The data showed that there was no significant difference in healing times between the two groups, so
the researcher concluded that calcium intake has no effect on bone healing time. Why is the conclusion of the researcher not
justified?
The researcher did not use a control group.
The bone injuries in different people cannot be compared.
The overall calcium intake of the two groups was not considered.
The data can only give a statistical probability, so no conclusion can be made.

What is a gene ? a) a section of a protein that codes for dna. b) the alternate version of a trait. c) the visible trait in the f1 generation. d) a section of dna that codes for a specific trait .

Select the word from the list that best fits the definition a system made of 25 satellites

Benito is doing research on the effects of florida's elevation on its climate. his notes include the following: 1. the average elevation of florida is 30 m above sea level. 2. the highest point in florida is britton hill, which is 105 m above sea level. 3. the change in temperature from 0 m to 1,000 m is 7 °c. what can benito conclude about the effects of florida's elevation on its climate? a.) florida typically experiences cold temperatures and temperature changes within a narrow range. b.) florida typically experiences cold temperatures and temperature changes within a broad range. c.) florida typically experiences warm temperatures and temperature changes within a narrow range. d.) florida typically experiences warm temperatures and temperature changes within a broad range.