Answer:
C, a long absolute refractory period.
Explanation:
Tetanus is not possible in cardiac muscle tissue because cardiac cells have longer action potentials and a very long refractory period compared to other cells. This helps prevent the heart from cramping and seizing up.
 
        
             
        
        
        
1. A logging company plants two acres of land with
trees for every one acre of forest it removes -B. using resources sustainably-
2. Julia uses old glass jam jars as pots for
her plants-C. recycling resources-
3. Jackson installs a solar-powered water heater
to supply his house with hot water-A. using renewable resources-
 
        
                    
             
        
        
        
Protists are a group of organisms that are characterized as Eukaryotes that are neither plants nor animals nor fungi. They are very diverse, and there are many hypotheses about their classification. The cladogram for protists is constantly changing and, sometimes, there are opposite hypotheses that both have data to support them. What is the implication of a changing hypothesis.
It is acceptable because data are still being collected.
It is acceptable everything in science should always change.
It is not acceptable because the correct answer needs to be found.
It is not acceptable because science never changes.
Answer:It is acceptable because data are still being collected.
 
        
             
        
        
        
Mangroves swamps or forests are productive wetlands and grow in saline and humid climates.  They play an important role in fisheries, coastal protection and wildlife habitat.
<h3>What is the importance of mangrove forests?</h3>
The mangroves are located in the subtropical and the tropical region where the climate is high in humidity and have saline and waterlogged forests.
The mangroves interact with the ecosystem through various means and help other aquatic organism for shelter and reproductive sites. 
They help the ecosystem in maintaining water quality and help in coastal protection along with aiding the wildlife habitat. The fishes reside in the roots and the forests structures and lay their eggs.
Therefore, option d. all of the above is correct.
Learn more about mangroves here:
brainly.com/question/238731