Answer:
To demonstrate that the inhibition by Janthinobacterium lividum on chytrid found in adult amphibian skin is real, the best experimental design would be take infected amphibians and assign them to two populations. Leave one population alone; inoculate the other with Jl. Measure the rate at which infection proceeds in both populations (option C).
Explanation:
Chytrids -<em>Batrachochytrium dendrobatidis</em>- are a species of pathogenic fungi with affinity for amphibian skin, causing alteration of keratin and damage to the animal body.
The verification that Janthinobacterium lividum is capable of inhibiting amphibian skin chytrids requires the design of an experimental model, the most appropriate being that of an infected amphibian population exposed to the bacteria, while the other (control) is not exposed to J. lividum.
In theory, amphibians in the population exposed to bacteria should decrease chytrid infection, whereas in the normal population the infection would remain the same.
Answer:
The main difference between lymphocytes and phagocytes is that lymphocytes generates specific immune responses against pathogens whereas phagocytes generate the same response to any pathogen.
Explanation:
This means lymphocytes are the tools of the adaptive immunity whereas phagocytes are the tools of innate immunity
A balance that performs in an enclosed compartment with no air currents to disturb is called an analytical balance.
Analytical balances are instruments used for precise and determination of mass of matter. They are accurate and very precise instruments. They require a draft-free location on a solid bench that is free of vibrations.
Analytical balances of today are digital and have built in calibration weights to maintain accuracy. Older versions usually require to be manually calibrated using specific standard weights.
I think your answer should be B. an organism. Hope this helps. =^-^=