What is an evolutionary grade?
Q: What is an evolutionary grade?
A: An evolutionary grade is a group of species at the same level of organisation that are not a clade.
Q: Who coined the term 'evolutionary grade'?
A: The term 'evolutionary grade' was coined by Julian Huxley.
Q: What is the difference between a clade and an evolutionary grade?
A: A clade is a strictly phylogenetic unit, while an evolutionary grade refers to a group of animals or plants which are very similar but not a clade.
Q: What is an example of a characteristic of an evolutionary grade?
A: An example of a characteristic of an evolutionary grade is a similar morphological or physiological complexity.
Q: Who strongly supported the use of 'grade' as a term in biology?
A: Ernst Mayr strongly supported the use of 'grade' as a term in biology.
Q: What is the purpose of using the term 'evolutionary grade'?
A: The purpose of using the term 'evolutionary grade' is to describe a group of species that are similar in morphology or physiology but not necessarily descended from a common ancestor.
Q: How long has the term 'grade' been used in biology?
A: The term 'grade' had been used for some time before cladism, according to Ernst Mayr.
