The correct answer is a cell.
The basic life building block is the cell.
The cell is termed as the biological, functional and structural unit of every living organisms. They are referred to as building blocks.
Cell biology is the study of cell. Cytoplasm is being found in the cell which is enclosed in a membrane. The biomolecules which are contained in a cell include nucleic acids and proteins.
There are organisms which contains single cell for example, bacteria and those which are multicellular for example, animals and plants.
Intermediates in the first half of glycolysis are: Glucose - 6-Phosphate, Fructose- 6- Phosphate, Fructose-1,6-bisphosphate, Glyceraldehyde-3-Phosphate, Dihydroxy acetone phosphate.
Intermediates in the second half of glycolysis are: 1,3-bisphosphoglycerate, 3-phosphoglycerate, 2-phosphoglycerate, phosphoenolpyruvate.
Glycolysis is the process of breakdown of glucose that occurs in all the organisms of the earth whether aerobic or anaerobic. It is a 10 step process that occurs in the cytoplasm of the cell.
Phosphoenolpyruvate (PEP) is the last intermediate of the glycolysis process which converts into pyruvic acid by the action of the enzyme pyruvate kinase. This step results in the synthesis of 2 ATP. The compound's role can also be seen in photosynthesis in C4 plants.
To know more about glycolysis, here
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Answer:
b. Small stagnant pools do not provide enough water to dilute ammonia, which is toxic.
Explanation:
Amongst urinary waste products which are ammonia, urea and uric acid, ammonia is the most toxic, then comes urea which is mildly toxic while uric acid is the least toxic. Various organisms excrete these urinary wastes as per their habitat/adaptations. These waste products have some advantages and some disadvantages over each other. For example, ammonia is extremely toxic so it cannot be retained in the body for a longer time but it requires very less energy to produce ammonia than to produce urea that is why most of the aquatic animals excrete ammonia as urinary waste to save their energy and keep on urinating frequently because they live in water all the time. In a large water pool, excreting this ammonia does not cause toxicity because it gets diluted in the surrounding easily.
In contrast to this, land inhabiting animals like mammals prefer to excrete urea as urinary waste even if they have to spend more energy/ATP to convert ammonia into urea with the help of urea cycle. Land animals have to retain urinary waste products in their body for a longer time as compared to aquatic animals and this is the reason why they urinate less frequently because urea being less toxic can be retained in the body for a longer time.
But african lungfish is an exception to other aquatic animals when it comes to producing urinary waste because they live in small stagnant pools of fresh water and if they will excrete ammonia as waste it will make the habitat toxic leading to their death.
The correct answer is the second option. Animals have two major types: vertebrates and invertebrates. Vertebrates are animals that have backbone while the invertebrates do not have one. Examples for vertebrates are birds and mammals while the latter are insects and squid.
