Answer:
<u>Statement no 1 is true</u>. A primary response occurs when an antigens invades the body for the first time. B cells and T cell are activated to generate a response.
<u>Statement no 2 is true</u>, the B cells form plasma cells and memory cells during a primary response.
<u>Statement 3 is false</u>. A secondary response is faster than the primary response. When a pathogen invades the body again, the immune system already has memory cells for this pathogen. These memory cells will generate a quick response.
<u>Statement no 4 is true</u>. During a secondary response, the plasma cells will make more plasma cells and will also make memory cells as the pathogen might invade again.
Answer:
Cell - Muscle cell, blood cells
Tissue - Muscle tissue, cardiac (heart) tissue
Organ - Heart, lungs, pancreas
Organ system - Respiratory system, circulatory system
Answer:
Formed when a male gamete (sperm) and a female gamete (egg) combine.
Explanation:
A zygote is formed when these two gametes come together. This initial phase is carried out in the Zygotic stage.
<em>Hope this is correct. Have a wonderful day.</em>
Answer:
below
Explanation:
I'm unsure on what your lab was about or what you experimented but I'll give you a definition of the carbon cycle.
The carbon cycle is the process in which carbon gets moved around in all the hemispheres of the earth. For example, atmosphere, geosphere, pedosphere, biosphere, etc. Carbon is very important not only many minerals but all biological compounds.
Best of Luck!
