Answer:
D. all of these.
Explanation:
All of these are the questions that involves ethical considerations because the method used in these questions are not doing naturally. Vitro fertilization is the fusion of woman's egg with the sperm of male outside the uterus of women which is unethical. Testing of unborn children in the womb for genetic disorders and producing genetically modify plants are also unethical because it does not occur naturally. It occurs due to intervention of humans in God's creation.
 
        
             
        
        
        
Answer:
isometric contraction
Explanation:
An isometric contraction occurs as the muscle produces tension without changing the angle of a skeletal joint. Isometric contractions involve sarcomere shortening and increasing muscle tension, but do not move a load, as the force produced cannot overcome the resistance provided by the load.
 
        
             
        
        
        
Leptin  hormone  is  the  hormones  which  appears  to  be   designed  to  protect  the  body  against  weight  loss.
    Leptin  hormone  is  secreted   from  fat  cells  and  it  helps  to  regulate  body  weight.  Leptin  hormone   is  predominantly made  by  adipose  cell that    help  to  regulate  energy  balance   by inhibiting  hunger. leptin  hormone  is opposed  by  the  action  of  the  ghrelin  hormone which  is  a  hunger  hormone/
        
             
        
        
        
The correct answer to this is:
“Astrocytes”
Astrocytes also called star cells due to their shape are the
most abundant glial cells in the brain. Extensions from these cells encase
capillaries and offer extra control over which materials enter or leave the
intercellular fluid of the CNS thus acting like a permeability membrane.
 
        
             
        
        
        
Answer:
No, this would not be a symbiotic relationship.
Explanation:
Symbiotic relationship is between plants and fungi.