The first reason was that his theory of continental drift was just too weak for most geologists to accept. Even though he believed the supercontinent that broke up into different continents moved, he did not have a clear explanation to how the continents moved. The other reason is that some of his explanation clashed with ideas that were widely accepted in the science communities. He used similar fossils from different continents to back up his theory of continental drift. However, at that time, many scientists that had observed similarities in fossils in places like South America and Africa believed there were similar fossils in different continents because of a land bridge that were formed by two continents.
Many science communities believe that land bridges allowed migration of many different species and even people to one place to another by large bodies of water frozen by low temperature known as ice age.
Answer:
The question: Do mice live longer when they are fed high sugar diets?
Hypothesis: There are two hypothesis the null hypothesis which we assume is correct, it states that a high sugar diet will have no effect on the life span of a mouse and an alternate hypothesis that we accept if evidence shows that sugar does increase the life span if mice. It says a high sugar diet does incerease the life span of mice.
Prediction: Assume that the null hypothesis is correct. High sugar diets will not increase the life span of the mice.
Collect data through experimentation. Use some mice as a 'control'. These mice will not undergo any changes but will be kept for comparison. Expose some other mice to high sugar diets and the compare the outcome with the 'control' mice.
Analyzing: From the experiment this you can choose which hypothesis you are going to accept. I.e. null: no change or alternate: there was a change and do some extra research to back up your hypothesis.
Hope this helps :)
Answer:
If a planet is considered habitable it means that the planet has all the conditions necessary to support life ,these conditions can be the presence of oxygen
Chewing bread, tearing paper, breaking rocks
Recessive alleles. Recessive alleles are only expressed phenotypically when the offspring receive recessive genes from each parent. In other words they are only expressed phenotypically when they occur in pairs. In the presence of dominant gene they are never expressed phenotypically and the offsprings with both the recessive and dominant genes occurring concurrently are referred to as carriers.
