Answer:
The correct answer would be she has probably already had all the strains of colds and viruses in her office.
Previous exposures to the strains of colds and viruses helped Andrea to develop adaptive immunity in her body.
Adaptive immunity helps in developing the memory against specific pathogens and thus helps in providing long-lasting protection against recurrent infections.
For example, after vaccination against a specific pathogen, our body becomes immune against that particular pathogen.
The correct option is C.
Primary reinforcer refers to the basic needs of an animal, such as food, water, shelter, etc. Secondary reinforcer, which is also called condition reinforcer refers to the condition in which a stimulus reinforces a behavior after it had been associated with a primary reinforcer.
In the question given above, the primary reiforcer is food.
Answer:
The process of respiration in plants involves using the sugars produced during photosynthesis plus oxygen to produce energy for plant growth. ... As with photosynthesis, plants get oxygen from the air through the stomata.
New
chemical- new substance
physical- just a state change
