Answer:
Explanation:
In facilitated diffusion, molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers. A concentration gradient exists for these molecules, so they have the potential to diffuse into (or out of) the cell by moving down it.
Iron is a key component of hemoglobin. Hemoglobin the the protein responsible for transporting oxygen uses iron to bond oxygen. Additionally Hemoglobin is a key component of RBC (erythrocytes)... If iron is deficit the body is not able to produce red blood cells and it can result in iron deficient anemia.
Answer:
Fossils found in lower rock layers are older than fossils found in upper layers.
Explanation:
because they are further away from the earth surface
Answer:
Substitution
Explanation:
Substitution is when is a mutation that exchanges one base for another. In this case, the T is an A.
T-G-A-G-G-T-C-T-C-C-T-C
T-G-A-G-G-T-C-A-C-C-T-C
<span>The correct option is D. An homologous structure is a type of structure that is found in different animals but have similar form of arrangement. Homologous structures indicate decent from a common ancestor or same evolutionary origin. Homologous structures in two animals may not be alike in appearance or function but genetically, they came from the same structure of the last common ancestor.</span><span />
