It is useful for an ecologist to identify the keystone species in an ecosystem because the keystone species is important to maintaining the stability of an ecosystem, and any changes in the keystone species population shows that there is changes in ecosystem health.
Answer:
all 20
Explanation:
It is impossible to know how many individuals will have the disease at the end without knowing other factors such as the condition where the subjects are being held, trial specifications and safety measures, etc. Based on the information provided, the best prediction that can be made is that all 20 subjects will have the disease. This is because since none of them are immune the disease will spread between the patients/subjects through contact or testing equipment.
Answer:
Flower -> Insect -> small fish -> Big fish -> Seagull
Explanation:
All of these animals are eaten by the one arrow is pointing to.
X-GAL is included in order to True An enzyme that cuts between the third and fourth bases from the 5′ end of a six base DNA sequence will result in blunt ends.
<h3>What are Bacterial Plasmids?</h3>
Plasmids are the little DNA rings that your bacterial self was stealing. Plasmids are specifically non-essential, extrachromosomal DNA fragments. What does that exactly mean? A plasmid is a brief, typically circular, double-stranded DNA fragment that is located outside of the main bacterial chromosome in the b.
Between 5 to 100 genes that are not necessary for the survival of the bacteria are typically found in plasmids. The primary bacterial chromosome contains the genes necessary for healthy cell structure, metabolism, and growth. The bacterium would still be able to survive even if all of the plasmids were taken out as long as it is flourishing in a low-stress environment.
Learn more about bacteria with the help of the given link:
brainly.com/question/16479483
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