Coal is a sedimentary rock because it is formed from plant debri or the remains
Answer:
We are all familiar with the basics of viruses: These particles infect living cells and wreak havoc throughout the body. But viruses aren’t the only villains around causing chaos in living things. Other infectious agents called viroids and prions — which are also tiny but powerful — can take down both plant life and entire animals.
Viroids are free RNA molecules of low molecular weight without any protein coat, while viruses can have either RNA or DNA molecules encapsulated in a protein coat. Viroids are smaller in size than viruses.
Viroids not made of cells.
Viroids don’t transform energy.
Viroids can’t reproduce on their own.
Answer:
Option (c).
Explanation:
The hemoglobin is the important protein present in the red blood cells. The hemoglobin molecules helps in the transport of oxygen and carbon dioxide in the body.
The iron is important for the hemoglobin molecule formation. The deficiency in the iron can cause the abnormal hemoglobin structure. The mice hemoglobin can binds with the only 50% of the oxygen molecules as compared with the wild type mice.
Thus, the correct answer is option (c).
Answer:
This cycle takes approximately 100,000 years to complete.
Explanation:
PLATO
The advantage for the reduced gametophytes in seed plant is that they gain nutrients from the sporophytes
Gametophytes are microscopic and have capacity to develop from spores retained in the sporangia of parental sporophyte. This kind of arrangement protect developing gametophyte from environment stress which enable it to gain nutrient from sporophyte.