Answer:
Autotrophs.
Explanation:
Autotrophs may be defined as the organisms that can prepare their own food. The autotrophic organism do not depend on the other organisms for their food.
Plants are considered as autotrophs because they can prepare their own food. The autotrophs uses sunlight to convert the water and carbon dioxide into food and oxygen.
Thus, the correct answer is option (3).
Gas exchange of oxygen and carbon dioxide takes place in the alveoli<span>. Oxygen from the inhaled air diffuses through the walls of the </span>alveoli<span> and adjacent capillaries into the red blood cells. The oxygen is then carried by the blood to the body tissues.</span>
Answer:
To separate DNA using agarose gel electrophoresis, the DNA is loaded into pre-cast wells in the gel and a current applied.
Explanation:
The phosphate backbone of the DNA (and RNA) molecule is negatively charged, therefore when placed in an electric field, DNA fragments will migrate to the positively charged anode.
