Accessory minerals ____. A)are present in large quantities in ...

[humphriesbr@me.com]

Accessory minerals ____.
 A)are present in large quantities in rocks
 B)are easily leached from the mineral crystal structure
 C)always fracture rather than cleave
 D)make up the structure of clam shells
 E)are not useful for identification and classification of rocks

Question 2

_____ is a special type of natural selection in which males compete for mates or females select mates based on such traits.
 A)Mate selection
 B)Breeding
 C)Sexual selection
 D)Cross-breeding
 E)Survival of the fittest

[Li Jun]

Answer to Question 1

E

Answer to Question 2

C