Answer:

Explanation:
B-cells engulf an antigen by endocytosis.
<u>Endocytosis:</u>
The process by which cell takes up external materials by fusing them with plasma membrane is called endocytosis.
After engulfing the antigen, B-cells become sensitive to the pathogen.
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Hope this helped!
<h3>~AH1807</h3>
Both types of feedback require a signal to begin the process, transduce that signal, and exhibit a response
Answer:
you can make it with items found ... Rubberband (or Rainbow Loom Bands-great way to use the millions that are just lying ... Once you have all the holes made in your straws you can move to the ... The peg will help when winding up the rubber band car to make it go.
Answer:
Energy is gained by consuming food
Energy is lost due to: The whole organism not being eaten (skeleton and fur left behind). Not all the food being digested – some passes out of the animal in excretion or egestion . Energy being lost as heat in respiration and therefore not being passed onto the next level.
Answer: Mercury and Venus are the only planets without moons.
Explanation: The outer Solar System includes Jupiter, Saturn, Uranus, Neptune and Pluto and the rest of the moons.