Answer: Marbles placed inside a hollow sphere are used to describe protons in a nucleus.
the marbles are not the protons nor is the hollow sphere the nucleus. Therefore, when the scientist does this, he is using a model. However the rest of the 3 options are the real things you use.
Animals and plants are associated with both divisions and phyla
As kingdom grows the more species are in the classifying group.
<span>And since there are only a number of kingdom and thousand species, it would account that species changes more rapidly and exponentially grows than kingdoms.</span>
<h3>The graph is useful for showing trends and for identification of the relationship between two variables. It shows how two variables correlate with each other.</h3>
Answer:
atrial systole, ventricular systole, and complete cardiac diastole.
Explanation:
Every single beat of the heart involves three major stages: cardiac diastole, when chambers are relaxed and filling passively; atrial systole when the atria contract leading to ventricular filling; and ventricular systole when blood is ejected into both the pulmonary artery and aorta
Answer:
the discoveries, events and people that continue to affect the history ... The extremely infectious disease was class-blind, killing rich and ... that a few cells remaining in Petri dishes could be used as biological weaponry. ... smallpox, a disease that had now been killing unhindered for at least 2,800 years.
Explanation:
