Examlex
Which major perturbation can occur to a close binary system and radically alter the evolution and behavior of the two individual stars?
Gene Investment Theory
A theory suggesting that individuals are genetically predisposed to invest resources in ways that maximize the passing of their genes to the next generation.
Survival of the Fittest
A concept in evolutionary biology describing the mechanism by which organisms better adapted to their environment tend to survive and produce more offspring.
Short Answer
A method of response in exams or surveys that requires a brief and direct explanation or fact.
Ethics Committees
groups responsible for ensuring that research and professional practices are conducted ethically, often reviewing proposed studies to protect participants' rights and welfare.
Q16: Compared with a star in the middle
Q26: Parallax of a nearby star is used
Q38: At the present time,the energy of the
Q89: Hydrogen "burning" by fusion reactions occurs only
Q101: Cepheids and RR-Lyrea stars are characterized by
Q130: Measurements from distant galaxies indicate that supernovae
Q148: The first accurate measurement of stellar parallax
Q174: A planetary nebula is a:<br>A) gas shell,
Q175: An astronomer observing certain regions of the
Q240: Which property is NOT a characteristic of