Which of the following is a primary reason for the lowered brain volume of older adults compared with that of younger adults? a. lower numbers of synapses
b. lower number of neurons
c. Increased length and complexity of axons hing
d. Increased growth of dendrites

then that particular organisms become extinct.

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.

yes, because even though a theory has a  lot of evidence to support it, it is not always true

answerblank(1); ecological; blank(2); evolutionary;