Answer:
una correcta distancia del planeta respecto al sol, la presencia de agua en el planeta, la presencia de la capa de ozono, La presencia de los elementos químicos esenciales, y el campo magnético terrestre
Explanation:
Answer:
Even the keeping of animals as pets represents a type of mutualism. Pet dogs (Canis familiaris) and cats (Felis catus) are fed and kept safe in domestication, while humans benefit from the companionship of these animals, and sometimes from other services, as when cats kill pest rodents.
Explanation:
Hopefully this helps :)
Answer:
The correct answer is -
The control group: the group of people with no supplements and kept inside.
The dependent variable: Vitamin D level in all groups.
The independent variable: the source of vitamin D (sun or tablets)
Explanation:
The control group of any experiment is the group of subjects that did not receive any type of treatment or did not manipulate by the independent variable. Here the group of 30 people that kept inside and did not get supplements is the control group.
The independent variable is a variable that directly affects the dependent variable by a change in the independent variable. In this experiment, the sunlight and vitamin D tablets are independent variables that affect the vitamin D level in people.
The dependent variable is a variable that is affected by the independent variable or depends on the independent variable, vitamin level is the dependent variable.
Answer:
Naturally acquired active, Live, primary, Artificially acquired active, Artificially acquired passive, Antibodies, Naturally acquired passive
Explanation:
Immunity refers to the state of being resistant to infection or reinfection with a pathogen
It can be passive or active immunity.
Active immunity can be Naturally acquired active immunity when a person is exposed to live pathogens,manifests the disease and due to primary immune response they become immune. Artificially acquired active immunity is through vaccination.
Passive immunity can be Naturally acquires passive immunity where a fetus gets some antibodies from maternal blood stream and becomes immune to certain pathogens. Whereas Artificially acquired passive immunity is when an individual is injected with antibodies such as gamma globulin.
