Which one of the following is true about the extinction of species? A. Very few species have ever become extinct. Most continue to exist B. There have been extinction events in which many species became extinct at about the same time aside from these extinction is very rare. C. Up until recently species rarely become extinct. Humans have caused the majority of extinction D. Many species have become extinct throughout the history of life on earth

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

28. how many linkage groups will be formed by homogametic organism with 28 chromosomes?

98 points you will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. before you conduct your experiment, you need to form a hypothesis. a hypothesis is a prediction of what you think will happen in the experiment. the hypothesis is a statement that describes “if” a certain set of circumstances are present “then” there will be a specific result that will occur. record your hypothesis here: record the results from step one of the experiment (dropping the objects in the air): first trial: second trial: third trial: record the results from step two of the experiment (dropping the objects in a vacuum): first trial: second trial: third trial: did the experiment support your hypothesis? using the data from your experiment, describe why you believe your hypothesis was either proven or disproven. what forces were acting on the objects dropped in the air? what force was acting on the objects dropped in the vacuum? part two: comparing forces choose two forces and compare and contrast these forces. you must provide two ways that they are alike and two ways that they are different. you may make a list, write in paragraph form, or make a chart. choose two forces and compare and contrast these forces. these must be different forces than used in the prior question. provide two ways that they are similar and two ways that they are different. you may make a list, write it out, or make a chart.