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stepan [7]
3 years ago
14

Briefly explain the role of memory cells in adaptive immunity.​

Biology
1 answer:
Marizza181 [45]3 years ago
4 0

Answer:

Memory cells remain ready to respond to a subsequent encounter with a pathogen quickly and efficiently. This so-called secondary response is always stronger than the primary infectious response

-i hope this helps sorry if its wrong

Explanation:

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How does the plasma membrane of a cell compare with the membrane in the U-shaped tube?
Lilit [14]

Answer:

La membrana plasmática, también llamada membrana celular, se encuentra en todas las células y separa el interior de la célula del ambiente exterior. En bacterias y en células de plantas, hay también una pared celular que se une a la membrana plasmática en la superficie exterior. La membrana plasmática se compone de una bicapa lipidia que es semipermeable. La membrana plasmática regula el transporte de materiales que entran y salen de la célula.

Explanation:

4 0
3 years ago
Explain the rock cycle by describing how an igneous rock can become a sedimentary rock, then a metamorphic rock, and then an ign
Paraphin [41]
An igneous rock can be formed from cooled magma. The igneous rock can become sedimentary if it is broken down by wind or water. The sedimentary rock can become metamorphic if it becomes buried in the earth, where pressure and heat would turn it into a metamorphic rock. The metamorphic rock can then become an igneous rock by melting underground and turning into magma, flowing out of a volcano, and cooling. 
5 0
3 years ago
Which of the following is likely to form the greatest number of bonds?
balandron [24]

Answer is Nitrogen, atomic number 7

The atomic number of nitrogen is 7. Hence, the number of electrons in the nitrogen atom is 7. In the nitrogen, valance electrons are 3 in number in 2P orbital. Its valency is 3. Therefore, it can make three bonds with other elements which is highest among the given options.

4 0
3 years ago
Define autotrophs, heterotrophs, producers, and photoautotrophs.
sergey [27]
Producers: living things that make their own food through a process called photosynthesis

Autotrophs: an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.

Heterotrophs: an organism deriving its nutritional requirements from complex organic substances.

Photo autotrophs: organisms that carry out photosynthesis. Using energy from sunlight, carbon dioxide and water are converted into organic materials to be used in cellular functions such as biosynthesis and respiration.
3 0
3 years ago
Which is a limitation of a scientific model?
iren [92.7K]

Answer:

The correct option is<em> D)  Models are not the "real thing" so it will never correctly represent the system in all respects.</em>

Explanation:

Scientific modelling can be described as a representation of the scientific theories or concepts in a way that can be better understood. Scientific models makes it easier to understand what physical, chemical or mechanical activity is taking place. Even mathematical representation comes under scientific modelling.

As models are not the real, hence they cannot be considered to be perfectly accurate. A model can never mark up to the complexity of nature.

8 0
3 years ago
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