The answers are; A & B
Intuitively as it sounds, cyclic change is the change that recurs over a particular period of time. Seasons recur every year in specific regions on earth. In addition, receeding and expanding of ice caps also occur based on seasons. These two are examples of cyclic changes.
You just need to count the number of crest (high points) if waves that like pass the fixed point 1 second or some other time period. The higher the number is man, the greater the frequency is, Hope this helps!
Answer:
The question is incomplete as options was not given. Here is the complete question:
Which phrase does not describe a way the human body responds to fight disease?
(1) destruction of infectious agents by white blood cells
(2) production of antibodies by white blood cells
(3) increased production of white blood cells
(4) production of pathogens by white blood cells
Explanation:
Answer is option 4, PRODUCTION OF PATHOGENS BY WHITE BLOODS CELLS.
During the fight against diseases by human, the white blood cells otherwise called leukocytes are involved in the protection of the body against infectious agents and pathogens, do not produce more pathogens rather antibodies to fight against the invading pathogens.
There is increased production of white blood cells during infection by pathogens, the infectious agents are destroyed by the white blood cells and the production of antibodies against the pathogens.
<span>Lamarck proposed that by selective use or disuse of organs, organisms acquired or lost certain traits during their lifetime. Then passed onto offspring-leading to change in species.</span>
