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The term ________________________ describes the changing of one element into another by radioactive decay.

A white dwarf is

Spectral types of stars (e.g., B, K, G, F, etc.) define uniquely their

What is the lowest mass that an object can have and still be a star?

One of the most recent supernova explosion known to have occurred in our own Galaxy

What is the most abundant element in the universe?

A white dwarf star, the surviving core of a low-mass star toward the end of its life, can be found on the Hertzsprung-Russell diagram

Only gymnosperms and woody plants have primary growth.

Which of the following statements does NOT describe the leaf epidermis?

Pores that facilitate the diffusion of carbon dioxide into leaves or herbaceous stems are