Answer:
The answer is:
B. Stretching toward the sun.
The deciduous trees have broad leathery leaves which stretch towards the sun. Their shape allows them to take in the maximum amount of sunlight to make food through the process of photosynthesis. This allows them to get food throughout all seasons, even in winter when there is little sunlight.
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Answer:
A radioactive (unstable) phosphorus isotope is made to replace a nonradioactive isotope of phosphorus in the molecule
Explanation:
Phosphorus has both unstable (radioactive) and stable isotopes. In any compound that contains phosphorus, the phosphorus atom present may be either a stable isotope of phosphorus or an unstable isotope of phosphorus.
However, if the molecule contains a stable nonradioactive isotope of phosphorus, it is possible to convert this isotope in the molecule to the unstable radioactive isotope by carefully carrying out exchange reactions in which the phosphorus isotope replaces the nonradioactive isotope in the molecule.
This is usually done in order to create radioactive tracers which are used to study chemical reactions and biochemical processes.
They are able to carry on photosynthesis longer then deciduous trees which lose thier leaves
