Answer:
A) They form covelant bonds
Explanation:
covelant bonding occurs when pairs of electrons are shared by atoms.
 
        
                    
             
        
        
        
Answer:  "photosynthesis" .
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<u>Note</u>:  These small, moving "green disks" seen while observing an <em>Elodea</em> plant cell—under a microscrope— are "chloroplasts".   The "chloroplasts" are organelles that ar responsible for "photosynthesis" .
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Answer: "homeostatic (dynamic equilibrium) range" 
Homeostasis can be observed through the "homeostatic range (pre-set limits)" of the body's pH, temperature and blood glucose. 
Explanation:
Homeostasis is the control of internal environment , physical and chemical conditions maintained by the living systems. A body takes control of its internal environment in spite of external forces interruptions. It can be defined as the body's defensive mechanisms. 
Homeostasis is maintained and controlled by the nervous system. 
Homeostasis is for optimal functioning of the internal environment such as body pH, body temperature, fluid balance, chemical ions balance (calcium, sodium and potassium) and blood glucose. 
Body temperature is normally about 37.5° C (98.6° F). 
Salt concentration in body fluids is normally about 0.9%
Blood glucose is normally about 10 mg/ml. 
A disturbed (imbalanced body as a result of external forces) body regains its haemostasis balance by 
Activating reflexes that fight the disturbance and maintaining behaviours to counteract the disturbance. 
 
        
             
        
        
        
Answer:
Tree planting is the safest solution to pollution. Save the earth, save our environment. Don't be cruel, conserve your fuel.
 
        
                    
             
        
        
        
The nurse have noted that the patient might have anorexia nervosa due
to low body mass index, due to malnutrition a delayed onset of menstruation may
result. Anorexia is an eating disorder characterized by low weight and a strong
desire to be thin. Another assessment finding is that the patient might have
type 1 diabetes mellitus where there is a risk of developing amenorrhea caused by interruption in the
hypothalamic-pituitary-ovarian-uterine axis.