What Two Things Are Needed to Create an Emission Nebula

question 37

Multiple Choice

What two things are needed to create an emission nebula?

• A)interstellar gas and dust
• B)hydrogen fusion and helium ionization
• C)cool stars and much interstellar dust
• D)hot stars and interstellar gas, particularly hydrogen
• E)hydrogen gas and carbon dust

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Definitions:

Eusociality

A complex social structure seen in some animal species, characterized by cooperative care of the young, reproductive division of labor, and overlapping generations within a colony.

Parental Investment

The effort expended by parents in raising offspring to improve their chances of survival and reproductive success.

Reproductive Output

The total number of offspring an organism can produce over its lifetime, a key factor in evolutionary fitness.

Trivers-Willard Hypothesis

A theory suggesting that parental investment in offspring is influenced by the parent's condition and the offspring's potential reproductive success.