Answer:
DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The order of these bases is what determines DNA's instructions, or genetic code.
Explanation:
Water pollution is the contamination of water bodies, usually as a result of human activities. Water bodies include for example lakes, rivers, oceans, aquifers and groundwater. Water pollution results when contaminants are introduced into the natural environment. For example, releasing inadequately treated wastewater into natural water bodies can lead to degradation of aquatic ecosystems.
In this question, the correct order of flow of energy in an aquatic ecosystem is Phytoplankton → zooplankton → fish → mammal.
<h3>What do you mean by an Ecosystem?</h3>
An environment may be defined as the complex of physical, chemical, and biotic factors (such as climate, soil, and living things) that act upon an organism or an ecological community and ultimately determine its form and survival.
The flow of energy in an aquatic ecosystem depends on the phytoplankton which are known as the producers of an aquatic ecosystem.
Therefore, the correct order of flow of energy in an aquatic ecosystem is described above. Hence, the correct option is B.
To learn more about the Aquatic ecosystem, refer to the link:
brainly.com/question/842527
From the smallest single celled organism to the tallest tree all life depend on the properties and reactions of four marcro molecules which are carbohydrate, protein, lipids and nucleic acid.
This is because, these organic molecules are the building blocks of all living things and they are responsible for most of the structure and functions in the body.
Antibiotics are ineffective in treating viral infections because Antibiotics kill only living cell. Antibiotics treat bacterial infections but not viral infections. Foe example, an antibiotic is an appropriate treatment for step throat, which is caused by the bacterium Streptococcus pyogenes. However, it is not the right treatment for most sore throats, which are caused by viruses.
