Answer:
Stem cells are special human cells that have the ability to develop into many different cell types, from muscle cells to brain cells. In some cases, they also have the ability to repair damaged tissues.
Explanation:
Answer:
The correct option is A. Polycythemia Vera
Explanation:
Polycythemia vera is a myeloproliferative disorder of bone marrow hematopoietic cells that causes excessive production of all types of blood cells.
Primary erythrocytosis occurs as a result of polycythemia vera, in this myeloproliferative disorder the bone marrow produces too many red blood cells along with excessive amounts of white blood cells and platelets. Bone marrow under normal conditions produces blood cells and contains the precursor cells of the three series: red blood cells, white blood cells or leukocytes and platelets or thrombocytes, this disorder is characterized by excessive or uncontrolled proliferation or growth of these cells. The increased production of red blood cells or erythrocytes is called erythrocytosis.
Answer:
B. Urban communities tend to have a higher population than rural communities.
Explanation:
I just took the test on ed.
Answer:
See below
Explanation:
Protists fall into the category of eukaryotes. They are diverse in nature and typically are found to be single celled organisms containing very organized structures.They are classified based on what is their source of nutrition.
<u>Autotrophic</u> - capable of photosynthesis to produce their own food, so an environment where sunlight, CO2 and water is available.
<u>Heterotrophic</u> - feed on other organisms
, an environment where prey is plenty and very limited or no access to sunlight.
<u>Mixotrophic</u> - a combination of the above two, an environment with all of the aforementioned factors present.
