Hi , the answers are:
A. a widely distributed fossil of narrow range in time
B.the beginning of a new or distinctive period
C. a molecule capable of acting as an enzyme
D. animal using only two legs for walking.
Answer:
<em>The correct option is C) H2SO4</em>
Explanation:
A molecule can be described as a substance which is made up of the same kind of atoms or element. For example, O₂, N₂ etc. Hence, option A is an example of an element.
A compound can be described as a substance which is made from different atoms or elements. For example, H2SO4 is made up of the elements hydrogen, oxygen, sulphur. Hence, option C represents an example of a compound.
Answer:
The formed elements of the blood include red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes). Of these, leukocytes are primarily involved in the immune response. All formed elements originate in the bone marrow as stem cells (HSCs) that differentiate through hematopoiesis.
Explanation:
The formed elements of the blood include red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes). Of these, leukocytes are primarily involved in the immune response. All formed elements originate in the bone marrow as stem cells (HSCs) that differentiate through hematopoiesis.
The meatpacking plants were mainly concerned about making money.
