Answer:
Dust bowl resulted from extreme drying and loosening of the soil that resulted in soil erosion by wind. Thus, it can be related that poor agricultural practices like over plowing , over grazing and leaving the land barren are human activities that must have contributed to the dust bowl.
Explanation:
- Dust bowl is referred to a period in early twentieth century when the the American and Canadian prairies faced severe dust storms.
- These dust storms resulted from severe drought and failure of practices to prevent soil erosion.
- Several people and livestock died as a result of choking.
- Over plowing, removal of top soil and small grasses exposed the soil to eroding winds and caused the dust storms.
It is convergent revolution
Answer:
Homologous structures can be described as the structures which are similar to one another present in different organisms. These similarities depict that the organisms might have a common ancestor i the past. For example, the forelimb of man, birds, dogs.
Analogous structures can be described as structures in different organisms which perform the same function but might not have a common origin. For example, the wings of bats and birds.
Answer:
C reproductive cells ( sex cells)
The structural variations that can happen in a protein after translation to make it function appropriately are:
• Folding – In the cytoplasm it partakes chaperonin protein that will aid to fold the protein into a purposeful shape. The hydrogen bonds will form to create secondary protein and disulfide bonds will form tertiary structure and hydrogen bonds.
• Cleavage – The activation into a purposeful protein over cleavage of certain amino acid sequences in which the amino acid order can fold to form the secondary or tertiary structure.
• Chemical Modification – A method of chemically responding a protein or nucleic acid with chemical components.
• Elaboration – In particulars of folding, chaperones, kinds of bonds, the role of Golgi, combination into current molecular arrays. Etc.