Parasitism
Explanation:
This relationship in which the heartworms gets nutrient from the host and in the process, the host eventually dies from infestation is known as parasitism.
- The organism that houses the heartworm is called the host
- The heartworm in itself is called the parasite.
- Parasitism is a positive - negative relationship in which one organism feeds on the other and causes harm to it in the process.
- Plasmodium falciparum is the parasite of malaria in man.
- In commensalism, one organism depends on the other without causing harm to it. Example is cattle and egret.
- Mutualism is a positive - positive relationship in which both organism derives benefits from the other. Example is lichen.
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Answer:
B. Are the insect’s antennae longer than its head?
Explanation:
Dichotomous key refers to the tool or method which helps the scientist to identify organisms.
It uses a specific series of questions which help in segregation of organisms and ultimately help the scientist to identify the organism on the basis of the observations or properties share by the organism.
Example of a simple dichotomous key is shown below.
Similarly, insects can have antennae longer or shorter than their heads. Thus, the question "Are the insect’s antennae longer than its head?" would help in segregating insects based on their antennae length.
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If the stimulus reaches the threshold an action potential will be generated. If the stimulus doesn't reach it no action potential will be generated. If the stimulus will be stronger the action potential will have the same amplitude. The refractory period makes it harder to generate an action potential so they decrease the frequency of action potential production.
Answer:
The building blocks of proteins are amino acids, which contain elements such as H,N,O,C , and more. They are the monomers of the proteins. So, the monomer will be the amino acids, and the polymer will be the proteins themselves
Explanation:
Answer:
Silencer
Explanation:
Silencers are the position and orientation free sequences that are present outside the protein-coding sequence of a gene. Silencers serve as a binding site for some transcriptional regulatory proteins that tend to inhibit gene expression. Binding of these "repressor" proteins to the silencers inhibits the gene expression.
The deletion of silencers from DNA would increase the rate of the gene expression as the inhibitory transcription regulatory proteins do not have binding sites to inhibit the gene expression. Therefore, the deletion of silencer sequences of the beta-globin gene would have caused the increased rate of its expression.