Answer:
Option (c).
Explanation:
Eukaryotes may be defined as the organism that contains the well defined nucleus and membrane bound cell organelle. The eukaryotes contains morte cell organelles as compared with prokaryotes.
The ribosomes of eukaryotes are larger than the ribosomes of prokaryotes. The 80'S ribosomes are present in eukaryotes whereas 70'S ribosomes are present in prokaryotes.
Thus, the correct answer is option (c).
 
        
             
        
        
        
Heterotrophs help in maintaining a balance in the ecosystem by providing organic compounds for autotrophs. Certain heterotrophs such as fungi help in reducing decomposed plant and animal material. This recycling activity is important in reducing waste in the environment.
I think *
        
             
        
        
        
Answer:
Explanation:
To preserve Zoological garden expertise are needed to manage the creatures that are there.
Good and conducive environment should be provided for the animals. 
Routine cleaning to avoid outback of diseases
Adequate resources should be provided this include food to avoid eviction of important species.
Geosphere is made up of the crust they form the layer of soil that support growth of plant and also supply nutrients.
Atmosphere is made of gas some of which help sustain life. Example is oxygen, carbon dioxide
Hydrosphere form the liquid portion of the earth it included large water bodies that serves as habitat for aquatic organism. 
Oxygen and carbon are been released into the atmosphere where they are been taking up by plant or animal dead and remains of this organism lead to the release of this gases in both organic and in organic form back into the soil where it is taken up by plants back into the atmosphere and some are washed in the water bodies. 
Plants takes in carbon-dioxide from atmosphere, absorbs nutrients from the soil through their root and water from the water table needed fro their growth. 
 
        
             
        
        
        
In the cell, the function of the smooth endoplasmic reticulum is that it produce lipids, which are fats and oils. They also transport materials..