Answer:
Once nitrogen is converted into compounds like ammonium and nitrate, these can be taken up from soils by plants and then the nitrogen can be used to form macromolecules like proteins and nucleic acids (DNA and RNA). ... It is an important part of many cells and processes such as amino acids, proteins and even our DNA.
Explanation:
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The water is warmed up by the sun and then it evaporates into the atmosphere. The sunlight warms the water by its heat.
Water is then cooled down and condensation takes place.
The water then finally returns back to the earth by the process of precipitation in the form of rain or ice.
Water and nutrients that are not recycled on earth are stored in the form of reservoirs.
Answer: Option D) there are no holes for blood to enter or leave the system
The human cardiovascular system is considered closed because there are no holes for blood to enter or leave the system
Explanation:
The closed circulatory system are made up of blood vessels called arteries from the heart that branch into small units called capillaries but eventually join up with other blood vessels called veins that are connected to the heart. So, blood is always confined to circulate within the blood vessels and the heart as there are no holes for blood to enter or leave the system
Thus, the human cardiovascular system is considered closed
I was wondering 2 but could u help me with the answer if u have it??
Glycolysis is the very first step in extracting the energy from the bonds of sugar. This is the breakdown of glucose to pyruvates which releases energy. One molecule of glucose produces four ATP molecules. Glycolysis is an oxygen dependent metabolic pathway.
