Viruses are made up of DNA
Consumers. we are on top of the food pyramid being lead consumers
Answer:
Photosynthetic organisms were making oxygen, but it reacted with the iron dissolved in seawater to form iron oxide minerals on the ocean floor, creating banded iron formations. ... The oxygen that is now in the Earth's atmosphere was not there at the beginning.
Explanation:
The pulmonary veins are the exceptions.
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The pulmonary veins are the veins that are part of pulmonary circulation and those veins transfer oxygenated blood from the lungs to the heart. <span> Two veins, one from each lung transport the blood to the </span><span>left atrium<span> of the heart.</span></span></span>
Answer:
The current answer is b) bacteria need for proper growth and cannot make themselves.
Explanation:
An essential nutrient is one which is required to the cell for the proper growth from the environment because it cannot be synthesized by the cell itself.
Some essential nutrients that bacteria require for their growth are carbon, nitrogen, water, iron, inorganic salts, and many other molecules.
These nutrients should be given from an easily available source to the bacteria for their proper growth because these nutrients are required to perform essential metabolic activities and can not be synthesized by bacteria on their own.
