Answer:
1) About 8.7 million.
2) They are being found everywhere.
Loss of habitat from human civilizations
Answer:
E. Enzyme cleaves PIP2, forming DAG and IP3.
D. IP3 binds to a ligand-gated ion channel in the ER membrane.
A. Calcium ions flow through the ligand-gated ion channel.
C. Calcium ion concentration increases in the cytosol.
B. Calcium ions activate a protein, leading to a cellular response.
Explanation:
The enzyme phospholipase C which cleaves PIP2 into DAG and IP3 Is activated by the G protein once the histamine signaling molecule is received. IP3 moves to the cytosol to bond to IP3 gated calcium channel in the Endoplasmic reticulum membrane allowing for influx of Ca++ from the Endoplasmic reticulum membrane to the cytosol prompting a cellular response. The histamine's signal transduction pathway allows for amplification and regulatation of a signal at different points
Primary succession is where lichens move into an area with no soil. They will then create soil and make an ecosystem.
1. Expose the bare rock do to volcanic eruption or glacier. The first step to primary succession is to have a place with bare rock, no soil at all. If there is already soil in place, this would be secondary succession.
2. Pioneer species arrives (like lichen). Lichens basically create soil from rock, they are needed to start an ecosystem.
3. Soil start forming and mosses begin growing
. Now the lichens will begin to create a lot of soil, capable of holding life like moss. There still won't be enough nutrients in the soil for anything more complex at this point.
4. Small plants start to grow. Since the moss is starting to die, it will add nutrients to the soil. After awhile, enough nutrients will be in the soil for small plants to grow.
5. Evergreen trees start growing. Evergreen trees are softwood, which will come before hardwood trees during primary succession.
6. Deciduous trees move in. Deciduous trees, like oaks and maples, are hardwood trees and will come last in primary succession. This is the ideal climax community.