Answer:
The correct answer is "The ammonia is controlled with a filter that uses two type of bacteria."
Explanation:
- The Biosphere on earth is composed of all the ecosystems, while each ecosystem is composed of the abiotic and biotic components and their mutual interactions. Aquarium is an example of aquatic ecosystem.
- Abiotic components constitute the non-living part of the ecosystem.
- Biotic components constitute the living part of the ecosystem.
- In the aquarium,
- The abiotic components include the air, water, heat, minerals, sunlight, fluorescent light.
- The biotic components include the aquatic plants, aquatic animals and the bacteria (in the filter attached to the aquarium).
- These bacteria are responsible for fixing dissolved nitrogen gas present in the water of the aquarium to ammonium and are called nitrogen-fixing bacteria.
- Free living bacteria like cyanobacteria or blue-green algae are examples of nitrogen-fixing bacteria.
- Fixation of dissolved nitrogen gas to ammonium and then conversion of ammonium to nitrites and nitrates (done by other bacteria) is essential because plants (terrestrial or aquatic) can use only nitrates as the source of nitrogen for the purpose of metabolism.
Answer:
<u><em>The correct option is the presence of a specific hormone receptor.</em></u>
Explanation:
Every cell membrane contains certain cell surface receptors which detect an extracellular molecule and allow it to perform function inside that particular cell. The cell surface receptors receive and transmit signals.
For a specific hormone to function inside a particular cell, the cell must possess a specific hormone receptor embedded in the plasma membrane which will detect the hormone and allow it to function inside the cell.
The two most important properties of a telescope are: Light gathering ability<span> - The better a telescope can gather light, the better you will be able to see far away stars and faint objects in the night sky. Magnification - The magnification of a telescope describes how much larger the telescope can make objects appear.</span>
Answer:
C
Explanation:
I think it is c but im only answering bc i am really bored.
