If you were to look at the age structure of a population of an endangered species and determine that there are mostly older individuals you could say that the population is declining and could be in danger of extinction.
<h3>What are 
endangered species?</h3>
An organism that faces extinction is referred to as an endangered species. The two main factors that cause a species to become endangered are habitat loss and genetic diversity loss.
Because it prevents our native fish, plants, and other animals from going extinct, the Endangered Species Act is crucial. There is no turning back once they are gone they are lost forever.
Endangered species are those that are at risk of going extinct and must therefore be safeguarded and conserved. Extinct species are those that no longer exist on the planet.
It's Important to Save Endangered Species because:
- From antibiotics to anti-cancer medications, they are the sources of those substances.
 - They are the earliest indication of significant environmental problems.
 - They support the well-being of crops (and, indirectly, people).
 - They help the economy grow.
 
To know more about Endangered Species refer to:  brainly.com/question/10415903
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Step-by- step-Explanation:
- Archaebacteria are very similar to Bacteria with respect to their cell size,prokaryotic organisation,circular DNA etc.
 - Archaebacteria very similar to Gram-positive bacteria on the basis of cell structure.
 - Both bacteria and Archaebacteria have several similar Metabolic Pathways.
 - Unlike Bacteria Archaebacteria are habitants of extreme climates like hot springs and ice capped continents.
 
Thus Archaebacteria are much alike to Eubacteria.
 
        
             
        
        
        
With the kisspeptin actions of releasing in direct to GnRH, it is expected that the receptors of the kisspeptin will be found in the hypothalamus. The hypothalamus' function is to coordinate the activities of the other system in the body in order to respond to different stimuli and to provide actions where it is needed in a person's life.
        
             
        
        
        
The answer is C because, Ecoregions cover relatively large areas of land or water, and contain characteristic, geographically distinct assemblages of natural communities and species.