The correct answer for this question is this one:"Blood flows through capillaries relatively slowly, allowing sufficient time for diffusion or active transport of materials across the capillary walls. In this way, the histological structure of capillaries permits a two-way exchange of substances between blood and interstitial fluid"
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Answer:
B. A small fraction of the energy is transferred to higher trophic levels, majority stays in the lower trophic levels
Explanation:
Energy transfer between trophic levels is insufficient. When an organism is eaten by another organism, not all of the biomass of prey forms the biomass of the predator. Majority of the energy is released into environment during cellular respiration. Some of the matter also remains undigested and is not used by the predator. Thus, only 10% of energy available at one level is transferred to the next level. So when we keep on moving up in a food chain, energy available keeps on decreasing.
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 answer for this question is CIRCULAR. hope it works.