The organism that has all the adaptations listed above is C. polar bear.
Answer:
I know im like 2 years late but the answer is d.
Explanation:
It'll always be the one where they are all together and all at or close to the exact target
Answer:
The problems that can be caused by Expansion or Contraction a;long with the solutions are:
Explanation:
- The railway tracks made of steel expand during the summer and contract during the winter. This can cause them to become curved during the summer thereby causing rail derailment.In order to prevent this, an air gap is kept in between the railway lines so that they get the space to expand without getting curved.
- The electric wires linking the telegraph posts are made up of metals and so they expand in the summer and contract in the winter, which can cause them to tear. This is why the wires are loosely fixed so that they can expand and sag in the summer and contract and tighten in the winter.
- Bridges are constructed with joints where some space is maintained to allow the easy expansion and contraction in summer and winter respectively.
The correct answer is (b) Increase
Pines trees are infected by different insects during the adverse and stressed environmental condition. Pine borer beetle is pest that infect pine tree during the stressed condition due to lack of water in that area. In healthy condition pines can kill these insects but in stressed condition insect will effect the plant so if the number of beetle will decrease, the population of pines will increase in that area.
Answer:
Beaver are helping to keep water in areas that would otherwise be dry." Even during drought, where beaver were present, there was 60 per cent more open water than those same areas during previous drought periods when beaver were absent.
Explanation:
