The correct answer is option A. They either match up with a receptor molecule on the surface of the cell or enter the cell through the membrane.
The intercellular signals are the signals, which transfer the signals from one cell to the another and the intracellular signals are those signals, which carries message within the cell.
The intercellular signals may or may not be transferred through the gap junctions. The chemical signals are one of the type of the cell signals. The chemical signalling molecules generally have a receptor on the cells, where these molecules can bind and can be cause the activation of the cell. The chemical signals can also enter into the cells through active transport and facilitated diffusion. So, these type of transports does not go through the Gap junction.
I believe animals that possess homologous structures probably evolved from the same ancestor. Homologous structures are similar because of common ancestry. A homologous structure is an example of an organ or bone that appears in different animals, underlining anatomical commonalities demonstrating descent from a common ancestor.
Answer:
E) The tetanus immune globulin provides immediate, short-term protection, and the tetanus vaccine provides long-term protection.
Explanation:
Basically, immunization is very important and necessary to protect the person from diseases.
In the above scenario, individual who is injured with severe lacerations does not have any history of previous tetanus vaccination. Because vaccination is for long term protection but it also take time to produce antibodies in an individual. Individual is injured and can have risk of tetanus.
So, along with vaccine we will administered the tetanus immune globulin to provide immediate, short term protection against tetanus.
Answer:
B. Chromosomes
Explanation:
This process is required to produce egg and sperm cells.
