3. Bark beetles are native to U. S. forests and play important ecological roles. In terms of the crosscutting concept of Stability and Change, describe how an increase in the bark beetle
population affects the ecosystem as a whole.

An autotrophic protist - they can perform photosynthesis and mainly consist of unicellular algae. they can be divided into number of systematic group according to the shape of their cell and the type of photosynthetic pigments they use.

1. protection 2. homeostasis 3. storage4.blood formation5.bone marrow 6.movement

The 3 steps are vasoconstriction, temporary blockage of a platelet plug, formation of a fibrin clot better known as coagulation.

1-taiga 2-desert 3-desert 4-taiga