<u>ANSWER:</u>
Scientists are now of the opinion that life originated from inorganic molecules.
<u>EXPLANATION:</u>
- Scientists now think that "life on earth" originated around 3.5 to 3.9 million years ago.
- According to scientists, "building blocks of life"(amino acids) were first formed and these combined to form the compounds essentially needed for life on earth.
- There are many scientists who also think that the first organic molecules on earth came from meteorites.
- There are however many scientists who also think that some of the "building blocks of life" may have been formed abiotically on earth.
Answer:
Superior vena cava, Inferior vena cava, Coronary sinus.
Explanation:
Superior vena cava, Inferior vena cava and Coronary sinus deliver the oxygen poor blood to right atrium.
Superior vena cava delivers the deoxygenated blood from the upper half of the body to the right atrium.
Inferior vena cava delivers the deoxygenated blood from the lower half of the body to right atrium.
Coronary sinus delivers the oxygen-poor blood from the heart muscles to the right atrium.
Answer:
The correct answer is option immune tolerance.
Explanation:
Immune tolerance is the condition in which there is no response to the immune system to molecules, tissues or substances that can induce an immune response.
Body Does not show the immune response to the molecules or substances that is present in the food is an example of immune tolerance. Immunological memory, passive immunity, and secondary immune responses are the response type of immunity but the immune tolerance is not a response.
Thus, the correct answer is option - immune tolerance.
Answer:
True
Explanation:
Many environmental factors such as humidity, sun exposure, or temperature, can affect how prone you are and can increase your chances of developing certain diseases.
I believe it would be 1. Species preservation and biological control.
