Scientific theories, such as the theory of evolution, must be

a- neither testable nor observable
b- testable and observable
c- observable
d- testable

Which entry is in the wrong position in the table?

What are the pros and cons of quadrat sampling?

The table above shows five different types of chromosomal abnormalities that can occur during meiosis. they result in either an individual having too many or too few chromosomes in their genome. what is the most likely cause of these chromosomal abnormalities?