Answer:
Liver
Explanation:
Eukaryotes are organisms that are made up of cells that have a membrane-bound nucleus. They are commonly described as cells with a "TRUE" nucleus. Animals and plants are eukaryotes.
Since it says "Animal" we can cross out oak, because this is a plant. Viruses are not cells, they are not considered living organisms as well. Lactobacillus is a type of bacteria and bacteria is classified as prokaryotic.
Prokaryotes are different from eukaryotes because they lack that membrane-bound nucleus.
The student is trying to see which substance (disinfectant 1, 2, 3, or the distilled water) can disinfect the most.
<span>This is a barrier island. These typically are formed as a way of protecting the mainland from storms and erosional forces. In addition, barrier islands typically form parallel to the mainland and in chains. These islands can allow wetlands to form once enough sand has built up near the shoreline.</span>
<span>It is the variable in an experiment is not directly altered</span>
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.
