<h2>Answer:</h2>
Bar Graph
<h2>Explanation:</h2>
Bar graphs can be used to compare changes over the same period of time for different entities such as the given case has two plants. The bars can be plotted vertically or horizontally. A vertical bar chart is sometimes called a line graph. As Dan is calculating the progress of two different plants over continuous period of time of sunflower seedling for two different fertilizers so he needs a bar graph for it.
Answer:
Some mutations can be contagious, like infections
Explanation:
A mutation refers to a change in the DNA sequence. Mutations result from a number of causes. It is a permanent alteration in the structure of the DNA.
Not all mutations are harmful. It has been scientifically proven that some mutations make organisms more infectious.
For instance, the new mutant of Corona virus in UK is more infectious than the former strain.
The child have fewer neural synapses than a stimulated child. In our nervous system, synapses are structures that allows neurons to conduct electrical impulse from each other. Synapses transmits information via electrical or chemical means. In chemical synapses, the electrical activity is converted into the release of neurotransmitter that binds in to the receptors that can be found in the post synaptic membrane.In Electrical impulse, the pre and post synaptic cell membranes are connected by synaptic clefts. This allow the passage of electrical current causing changes in the voltage in the presynaptic cell and induce voltage change in the post synaptic area.
Answer:
Parasitism
Explanation:
The kind of relationship in which one organism benefits to the detriment of the other is called parasitism. The parasites feeds on the other organism and it derives nourishment and nutrient from it. The host or the other organism suffers and does not benefit from the relationship. This relationship can lead to the eventual death of the host organism. Example is tapeworm and man.
Barnacles belong to phylum Crustacea.
