Answer:
Option B, by saltation in the first few meters above the land surface
Explanation:
In the process of saltation, sand is carried by air and the sand grains remains suspended for a small distance till the fall down. These sand grains form a parabolic trajectory before falling down. The other characteristics such as height and time of suspended grains depends on grain size, shape, and density, lift & drag force and characteristics of wind such as velocity and turbulence.
Hence, option B is correct
Answer:
DNA markers can serve as a proxy for the genome and hence can be used in the identification of any organism or individual organism including humans. Highly repetitive sequences of DNA called STRs:<u>can be used in DNA fingerprinting for forensic purposes</u>
Explanation:
Short Tandem repeats (STRs) consist of short sequences of neucleotides that are repeated many times tandemly.
STR analysis is a technique for producing and comparing DNA fingerprints that reflect the lengths of STR sequences at specific sites in the genome hence <u>can be used in DNA fingerprinting for forensic purposes</u>
<u>It has been extremely successflu for use in personal identification of criminal suspects, paternity issues, as well as indentification of diseases.</u>
Phenylalanine hydroxylase (PHA) performs an enzymatic function during the conversion of phenylalanine, to tyrosine. Existing naturally in several types of foods, for instance, breast milk, PKU is an essential α-amino acid and one of the plethora of amino acids used in the formation of proteins. Phenylalanine exists in three forms; L-phenylalanine, D-phenylalanine (mirror image of L-phenylalanine), and DL-phenylalanine which is a typic combination of D and L-phenylalanine, and unlike D and L- phenylalanine, is not found in foods. On the other hand, tyrosine, apart from being a derivative of phenylalanine, is a non-essential amino acid that forms part of the list of amino acids utile during the constitution of proteins. Ordinarily, lack of PAH leads to the accumulation of phenylalanine (the phenylalanine is not converted to tyrosine) leading to the development of a disease called Phenylketonuria (PKU).
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