Which of the following statements does not provide an explanation for hybrid vigour ?

Define hybrid vigour?

Heat is added to a substance, but its temperature does not rise. Which one of the following statements provides the best explanation for this observation ?

What is hybrid vigour?

What is hybrid vigour?

Which of the following does not provide long term immunity?

Which of the following does not provide long term immunity?

Define hybrid vigour.

Define hybrid vigour.

What is hybrid-vigour?