Answer:
bcz lichens grow only there have no pollution and new ecosystem have no pollution in this way lichen are necessary after disturbances bcz after pollution have created by human
Polar amino acids tend to be hydrophilic, meaning that they bond to water. These are those that establish hydrogen bonds to water. They are considered polar because they have a R group that's hydrophilic. Because of this characteristic, in a protein they tend to a be a at the surface maintaining contact with the surrounding solutions. The most common polar amino acids are: arginine, lysine, glutamic acid, and aspartic acid.
B.) A food chain shows only a single pathway of energy.
Remember that food web are made out of lots of food chains combine. Food chain is only one pathway.
Answer:
0.859 minutes of arc
Explanation:
The arc length for a given radius and angle in radians is ...
s = rθ
So, the angle is ...
θ = s/r
For the given geometry, the angle in radians is ...
θ = (0.75 mm)/(3000 mm) = 0.00025 radians
In minutes of arc, this is ...
(0.00025 radians)(60 minutes/degree)(180 degree/(π radians)
= (0.0025)(60)(180)/π minutes
≈ 0.859 minutes
The angle subtended is about 0.859 minutes of arc.
