### important conservation technique:

Captive breeding
* can also keep pest flies away if done carefully.
* focuses on the reproduction of rare animals in captivity.
* gives iguanas with good personalities a chance to reproduce.
* helps to raise reproductive rates and maintain genetic diversity.
* is an important conservation technique.
* practical way for scientists to restore rare fish to streams or rivers.
* raises many ethical, environmental, social and economic issues.
* very succesfull way to reintroduce the population into the wild.
+ Short-beaked Echidna, Conservation status: Mammals of Australia :: Mammals of New Guinea :: Monotremes
  * Captive breeding is difficult, partly because of the relatively infrequent breeding cycle. This has conservation implications for the endangered species of echidna from the genus 'Zaglossus', and to a lesser extent for the Short-beaked Echidna.

### important dicot characteristic:

Secondary growth
* depends on both the vascular and cork cambia.
* gives the plant girth, producing new xylem and phloem.
* helps in the production of wood and bark in trees.
* includes the thickening of the stems and roots.
* is also what allows dicots to form an ever-widening stem or trunk
  - an important dicot characteristic
  - characterized by an increase in thickness or girth of the plant
  - found in dicots but absent in monocots
  - produced by a cambium
  - that growth which determines the girth or diameter of the plant stem
* occurs due to cell divisions in the vascular cambium a.
* produces wood and bark in seed plants.

### important ecological concept:

Food web
* Some food web analyses use isotopes.
* Some food web analyses use multiple isotopes
  - stable isotopes
* collection of food chain that correspond to each other.
* is an important ecological concept
  - several food chains connected together
* network of food chains in an ecosystem
  - interconnected at various trophic levels
* represents complex network of many interconnected food chains and feeding relationships.

### important environmental minerals:

Clay mineral
* Most clay minerals are the result of weathering of some pre-existing rock
  - too small to identify in the petrographic microscope
  - give off an 'earthy' smell when wet
* Some clay minerals cause damage.
* are important environmental minerals
  - products of the rock that makes up most of Siberia and the surrounding mountains
  - remarkable substances
  - silicates arranged in microscopic sheets of aluminum and silica
* attract water molecules and plant nutrients ions.
* can also act as cementing agents.
* continue to be formed as long as the soil exists.
* form complexes with humus and act as reservoirs of nutrients
  - diagenetically soon after deposition of the debris flow
* occur as microscopic plates and help hold water and nutrients of plants in soil.

Important event
* Most important events occur during eras.
* are likely to cause very many changes in gene expression.
* bring joys.

### important export product:

Natural stone
* Most natural stone used for patios is rock that can be quarried in flat, thin sheets.
* are usually soft and smooth.
* is an important export product
  - both a durable and popular material
* mark their graves.
* offers almost as many possibilities in color and texture as tile.
* places special demands on the tools used to work it.
* vary greatly in size and quality.

### important field:

Molecular evolution
* is an important field
  - studied through proteins and enzymes
* looks at how proteins have evolved and how organisms are related to each other.
* result of pure blind chance.