3. The principle that states geologic changes occur
over long periods of time is
a. the threshold theory,
b. catastrophism.
c. gradualism.
d. the feedback mechanism.
Da
bogato breakun into continente during

The excretory system, need answers for all: )

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean

Draw any one of the skeletal structures of a 2° alkyl bromide having the molecular formula of c6h13br and two stereogenic centers. indicate chirality by using wedge and hashed wedge notation. lone pairs do not need to be shown.