The correct answer is b. The kingdom classification system can change based on the discovery of new information and organisms.
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The kingdom is taxonomic rank, below domain which is divided into smaller groups called phyla. Different kinds of proposed classification changed over time and at the moment the kingdom-level classification of life includes Bacteria, Archea, Protozoa, Chromista, Plantae, Fungi and Animalia.</span>
Cell membranes serve as barriers and gatekeepers. They are semi-permeable, which means that some molecules can diffuse across the lipid bilayer but others cannot. Small hydrophobic molecules and gases like oxygen and carbon dioxide cross membranes rapidly.
The answer would be the second option. The best reason for doing more background research after making an observation and before forming a hypothesis is to prevent making the same mistakes made in a prior experiment. It is to make sure that you are able to see the problems of a research and make an experimental design that will minimize the errors.
A white blood cell engulfing a bacterium is an example of blood functioning in protection.
<h3>What is a white blood cell?</h3>
White blood cells or better called leukocytes are blood cells produced in the bone marrow that belong to the immune system which are responsible for the <u>protection </u><u>and</u> <u>combat of infections and diseases</u>.
There are different types of white blood cells, among these are: <em>neutrophils, eosinophils, basophils, monocytes and lymphocytes</em>.
Usually the blood count of these leukocytes is used to detect situations such as infections, allergies, inflammation or leukemia.
Therefore, we can confirm that a white blood cell engulfing a bacterium is an example of blood functioning in protection.
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