I would say, C. Because an controlled variable is an experimental element which is constant and unchanged throughout the course of the investigation.
:
A flea and dog are an example of parasitism, because the flea irritates the dog's skin and feeds on its blood.
In a parasitic interaction, one organism benefits whereby the other one harmed. It is a positive - negative relationship. This interaction involves the interaction between the host and the parasite. The host is the bigger organism, here, the dog that is being harmed. The parasite is the flea causing the harm and benefiting from the relationship.
Certain bacteria live in the digestive tract of humans, and their relationship is an example of because mutualism the bacteria help humans to break down the food they eat.
In mutualism, the interaction is based on both organism deriving benefit from one another. Here, the bacteria gets its nourishment by breaking down human food. Human beings are able to digest the food better and are also nourished. A win-win situation is established.
Cattle egrets eat insects off the back of an elephant, which is an example of commensalism because the cattle egrets benefit without either harming or helping the elephants.
This relationship is known as commensalism in which one organism derives benefit. The other one derives no benefit and it is also not harmed in the process. The egrets feeds on the insects that are not harming the cattle.
Explanation:
Answer: Slow, long lasting, widespread responses
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Evolution is the process by which an organism develops an adaptive mechanism to respond to selection forces.
Human evolution is similar to every evolution in the animal and plant kingdom. Forced by the environment both internal and external forces, animals adapted to the extreme conditions they were put in. As humans evovled, bacteria and other microorganisms also evolved to better attack and obtain food from other organisms including mankind. </span>
Answer:
Fungi
Explanation:
In the given question, the characteristics of an organism have been provided based on which the organism can be distinguished. The characteristics are:
1. Multicellular: Bacteria is unicellular therefore other options could be the answer.
2. Eukaryote: Protista is a eukaryotic organism but unicellular therefore the answer could be either plant or fungi.
3. Lacks chlorophyll: all plants possess chlorophyll therefore the organism could be Fungi.
4. Produce spores and reproduce sexually and asexually: confirms that the organism is Fungi as the fungi show these characteristics.
Thus, Fungi is the correct answer.
