Yes they can be seen using a light microscope.... hope this helps! :)
Answer:
The correct answer is- Immune system
Explanation:
There are physical, chemical and immunological barriers present in our body which helps us to protect from the foreign antigen. They all assist each other and helps in pathogen removal from our body.
The physical barrier includes skin, gastrointestinal tract, respiratory tract, etc which do not allow the microbe to enter the body. Chemical barriers include tear, saliva, acid in the stomach which kills microbes on the body surface.
Immune cells like macrophages, B cells kills microbes when it gets in the body. Lymphatic system also contain immune cells and helps in microbe removal.
So the immune system is assisted by physical barrier, chemical barrier, and lymphatic system.
<span>Endotherms</span> <span>require</span> <span>a higher
metabolic rate</span> <span>than</span> <span>ectotherms</span>. This is because <span>endotherms</span> maintain a <span>regular/</span> constant body temperature while <span>ectotherms</span> depend on the heat in the <span>environment</span> to regulate body <span>temperature</span>.
Therefore, <span>endotherms</span> must eat regularly to
maintain this metabolic rate and <span>sustain</span> <span>constant</span> temperatures.
Explanation:
the chemical energy is stored is carbohydrate molecule such as sugars, which are synthesized from carbon dioxide and water - hence the name photosynthesis .
