Science Questions

19- invasive species- a foreign species introduced successfully into a new area, and competes successfully with the native species

Examples in new York

* Asian longhorn beetle/ destroys maple trees/ mostly in nyc area

20- Ecosystem productivity- organism plus non living (abiotic) components. Example wet lands

Net primary productivity; total amount of carbon in biomass by photosynthesis per year minus the amount of carbon oxidized by cellular respiration

21- two examples of global biomes

1. Plants

2. Animals

22- properties of aquatic biomes

* Salinity (from near zero to 35ppt)

* Water depth- affects light quality coming inside the water

* Water flow- limit types of species

* Nutrients

* Nitrogen& phosphorus short supply except near the coast

* Iron short in the ocean

* Aquatic biomes are being affected because human alered them, by population, changing their chemistry

23- been critical for development of human cultures because the domestication of animals has been critical to the survivorship of humans. It helped with food and labor for farming and allowed technological advances.

24- plants respond to attacks with chemical signals that stimulate defense

25- new York plants

Maypole ( podophyllum peltatun)

Contains podophylum (resin in roots )

Anti viral

Etoposide ( interferes with cancer cell growth)

Treatment for living & testicular cancer

Venereal warts

Its defense is the roots

Example 2 prunus serotina tree

* Bark contains

* Tannins

* Prunasim

* Treatment for

* Colds

* Fever

* Cough medicines

The bark protects it against chewing animals

26- photosynthesis makes sugars from co2 sugars= “cheap” building blocks for many other compounds

Plants that use sugars grow faster

Because Nitrogen is more expensive to make the plant grows slower.

Nitrogen is usually scarce in soil

Nitrogen is needed for photosynthesis enzymes...