The main processes of the nitrogen cycle are nitrogen fixation, nitrification, denitrification, anammox, and ammonification.
Explanation:
The sequence in which nitrogen passes from the atmosphere to the soil and organisms, and then is eventually released back into the atmosphere, is called nitrogen cycle.
Nitrogen cycle involves the following processes:
•Nitrogen Fixation
It is a process by which atmospheric nitrogen is converted into the form which can be easily absorbed the organisms on earth.
Nitrogen Fixation is carried out by the following ways:
1.By lightning: When lightning occurs, the high temperature and pressure convert nitrogen and water into nitrates and nitrites which get dissolved in water and are readily used by aquatic plants and animals.
2.By bacteria- Molecular nitrogen is converted into nitrates and nitrites by free living bacteria or the bacteria like Rhizobium present in the root nodules of legumes. Some bacteria convert the nitrogen gas (N2) to ammonia (NH3) which plants can use.
• Nitrification: It is the process by which ammonia is converted into nitrites and nitrates.
•Ammonification: It is the process by which soil bacteria decompose dead organic matter and release ammonia into soil.
•Denitrification: It is the process by which nitrates are converted into atmospheric nitrogen back to complete the cycle.
Answer: Is A
Explanation:
Lichens break down rock from there the soil start to create life i don't how to explain it
Cell differentiation is a process by which stem cells give rise to different type of cells with different functions and located in different locations. it is is true that all cells in a particular organism have same composition of genetic material. however they perform different function because of the process of cell differentiation. cell differentiation results from expression of some genes inside the cell the dictate what type of cells should be synthesized.after gene expression proteins produced send the message to stem cells to indicate the type of cells to be manufactured.
Answer:
B. In cancer cells, too little apoptosis occurs, resulting in malignant cells that will not undergo programmed cell death.
Explanation:
Answer:
- <u>Huesos:</u> HUMERO, COSTILLAS, TIBIA, CUBITO, VERTEBRAS, CLAVICULA, ROTULA, FEMUR, OMOPLATOS, FALANGES.
- <u>Músculos: </u>DELTOIDES, BICEPS, ADUCTOR, PECTORAL, GEMELOS, DORSAL, CUADRICEPS, IZQUIOTIBIAL, CORAZON, ABDOMINAL.
- <u>Articulaciones: </u>CODO, MUÑECA, CADERA, TOBILLO, HOMBRO, CRANEO.
Explanation:
Los huesos son órganos que tienen la función de dar estructura, protección y soporte al cuerpo. A los huesos se le unen los músculos, los cuales hacen que los huesos se muevan al contraerse estos. Las articulaciones unen los huesos entre sí y permiten junto con los músculos el movimiento del cuerpo y de sus diferentes partes.