Answer:
c. birds are baited by the metal hook...
Explanation:
Answer:
A healthy ecosystem consists of native plant and animal populations interacting in balance with each other and nonliving things (for example, water and rocks). ... Decomposers break down dead plants and animals, returning vital nutrients to the soil. Plants take up these nutrients, along with water, through their roots.
Explanation:
Answer:
The structure of the cell is very much linked with the functions of the cell.The cardiac muscle is made of myocardium which serves the body by providing the blood, nutrients and oxygen.The cardiac muscles appears stripped when seen under microscope.
The skin consists of the tissues and cells which are close enough to create a boundary which does not allows the entry of materials and pathogens inside the body.
Hence, the function and the morphology of the cells are somewhere related to each other.
Answer:
A mutation in Ras protein which will cause hyperactivity will eventually lead to cancer.
Explanation:
Ras protein was first discovered in Rous sarcoma virus (RSV) and it is a proto-oncogene product. In normal conditions, it plays an important role in cellular signalling but in case of gain of function/hyperactivity it gets converted into cellular oncogene. In several types of cancers a point mutation has been reported in Ras protein.
Just like G protein, it is also a GTPase switch protein but unlike G protein which is trimeric, it is monomeric. In the plasma membrane, it is attached with the help of lipids like prenyl or palmitoyl groups. During signal transduction pathway when it gets activated, it downstream activates MAPK pathway and causes gene expression but when it gets hyperactivated it causes over expression of genes leading to cancer.
