Explanation:
c.) Postive nucleus, Negative electrons
Answer:
-Cells are the basic units of structure and function for living things.
-All living things are made of cells.
-All cells come from pre-existing cells.
Explanation:
The true statements are:
Only a fraction of matter consumed at lower trophic levels is transferred to higher trophic levels to produce growth and release energy through cellular respiration.
And
There are fewer organisms at the higher trophic levels of a food web.
These first statement is actually the reason for the second.
Infection occurs when viruses, bacteria, or other microbes enter your body and begin to multiply. Disease occurs when the cells in your body are damaged as a result of infection and signs and symptoms of an illness appear. Pathogenic microbes challenge the immune system in many ways.The adaptive immune system ( antigens) reacts specifically to pathogens (germs). It is able to recognize attacking pathogens and fights against certain antigens or foreign substances. The next time a known antigen is encountered, the adaptive immune system can respond faster.
