Answer:
1. 1 g/kg body weight
2. 5 g/kg body weight
3. 8 g/kg body weight
4. 10 g/kg body weight
Explanation:
Carbohydrates are one of the most important food groups together with lipids and proteins, and they must be consumed to have a healthy diet. Carbohydrates can be classified into three subtypes: monosaccharides (e.g., sugars), disaccharides (e.g., lactose), and polysaccharides (e.g., starches), which are broken down and absorbed as monosaccharides in the small intestine. These different types of carbohydrates are found in fruits (sugars), milk (lactose), and cereal grains (polysaccharides). Carbohydrate intake in the diets ranges from 6 to 10 g/kg bodyweight depending on the gender and the fitness characteristics of the person, as well as his/her daily energy expenditure. It has been proposed that carbohydrate intake should provide 45–65% of daily calories regardless of age or sex of the individual.
Explanation:
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Answer:
D) sympatric speciation and habitat isolation
Explanation:
Sympatric isolation is a form of evolutionary process whereby different species from an ancestral origin evolve within the same geographical environment as a result of reproductive isolation.
Habitat isolation is a form of reproductive isolation which occurs when two populations of a species inhabiting overlapping habitats become unable to interbreed with each other.
Reproductive isolation (habitat isolation) that occurs in the fleas is as a result of the new species becoming separate from it's ancestral species which feed only on pronghorn antelopes, although both species can still be found in the same geographical location (rangeland). The new species now have preference for cattle blood, and so are now found on cattle.
In the situation of the two new species of flea that would evolve, it can be said to an example of sympatric speciation and habitat isolation, since the host mammal is assumed to be their habitat and both the cattle and pronghorns often associate with one another in the same open rangeland.
The question is incomplete. The complete question is as follows:
Which of the following mutations is most likely to cause a phenotypic change?
A) a duplication of all or most introns
B) a large inversion whose ends are each in intergenic regions
C) a nucleotide substitution in an exon coding for a transmembrane domain
D) a single nucleotide deletion in an exon coding for an active site
E) a frameshift mutation one codon away from the 3' end of the nontemplate strand
Answer: D) a single nucleotide deletion in an exon coding for an active site
Explanation:
Deletion or insertion of a single nucleotide in an axon coding for an active site is called frameshift mutation.
The sequence of codons is read during translation, in order to synthesize a amino acids chain and form a protein from the nucleotide sequence. Frameshift mutations occur when the usual codon sequence is broken by the deletion or addition of one or more nucleotides. For example, if only one nucleotide is removed from the axon sequence during the RNA splicing process, then there will be a disrupted reading frame for all codons before and after the mutation. This may result in several incorrect amino acids being introduced into the protein. Disruption in protein sequence will cause phenotypic change.
Hence, the correct option is D) a single nucleotide deletion in an exon coding for an active site
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