The answer is A. Putting the aquarium in the dark means that
the aquatic plants will not be able to photosynthesize. The process of photosynthesis produces oxygen
as a by-product. The oxygen is used by the fishes in respiration and release
carbon dioxide. The carbon dioxide is used by the aquatic plants in photosynthesis.
Answer:
According to me answer no 4 is correct.
Explanation:
single cell amoebas can perform all life functions capture the food, digestion, respiration, excretion, and reproduction also. These all are similar to multicellular animals.
Answer:
TRUE
Explanation:
The green plants have green pigments present on their leaves, which are commonly known as chlorophyll. This chlorophyll pigments have the ability to absorb the necessary amount of sunlight, that is required to carry out the process of photosynthesis. Photosynthesis usually refers to the process where the green plants can synthesize their own food in the presence of sunlight, water (H₂O), and carbon dioxide (CO₂), and in return, it liberates food (glucose) and oxygen (O₂) that is essential for the survival of all living organisms.
The reaction that takes place during the time of photosynthesis is given below-
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
This process converts light energy into chemical energy, that is stored in the molecules of glucose.
Hence, the above statement is TRUE.
Answer:
(B) Energy transfer between trophic levels is almost always less than 20% efficient.
Explanation:
The ultimate source of energy on the Earth is the Sun. The energy coming from the Sun is captured by green plants by the photosynthesis. During photosynthesis sun energy is fixed into chemical energy (carbohydrate). So, in an ecosystem energy flow is unidirectional (from sun to the green plants). The fixed chemical energy from green plants is transferred to the herbivores then to carnivores through food. When one organism eats another organisms, only 10 % of the energy present in the organism is transferred as a food for the next organism and a large amount of energy is lost as heat into the environment. Thus, energy keeps on decreasing when stored energy moves from producers to top consumers. Thus, less than 20% energy transfer limits the trophic levels in most of the ecosystem.
The digeorge syndrome is a genetic disorder, which caused by the deletion in the chromosome number 22. This disease is characterized by the congenital heart disease, immunodeficiency, and hypocalcemia.
In this case, the most frequent clinical manifestation is hypocalcemia. Hypocalcemia is the condition, in which the blood calcium level would be declined to a significant level.
