What is exposperm?

How do vestigial structures provide evidence for evolution? What explanation based on observed facts that are made? What is it important to use the same amount of water each time you conducted the experiment? Why do doctors recommended that some people use low sodium salt instead of table salt? What does vigorous mean in science? What is my expectation of science? What happens to recyclables after they are collected? Why is it important to prepare for a tornado? What are some examples of sentences using synonyms? Why do opaque objects make clearer shadows? Could I be pregnant if I had a period this month but it was a little funny acting and my body feels funny but my pregnany test is negative? What are some examples of pure solutions? Can you give me some adetives? Which freezes faster out of salt water sugar water and tap water and why? What you gained in terms of upgrading your theoretical knowledge? What are the names of the steps that can be used in Scientific methods? Is picking up your shoes a voluntary or an involuntary response? What is MND? Materials that can flow to fit their containers include? What is the main purpose of controlled variables in an experiment?