Ans.
HD (Huntington's disease) is a genetic neurological disorder that occurs due to damage and death of brain cells. it is caused by an autosomal dominant mutation in HTT (huntingtin) gene, having a trinucleotide repeat section that makes HTT protein.
The mutation leads to an increase in this nucleotide repeat count, associated with formation of altered or mutated huntingtin protein. These altered proteins show deleterious affect on brain cells and result in Huntington's disease.
Thus, the correct answer is 'option A). a mutated gene.'
Answer: The answer is B- Cool Air Is Sinking
Explanation:
Answer:
Cyanobacteria are aquatic and photosynthetic, that is, they live in the water, and can manufacture their own food. Because they are bacteria, they are quite small and usually unicellular, though they often grow in colonies large enough to see. They have the distinction of being the oldest known fossils, more than 3.5 billion years old, in fact! It may surprise you then to know that the cyanobacteria are still around; they are one of the largest and most important groups of bacteria on earth.
Answer:
The red color of the colonies is an example of <u>a phenotype .</u>
Explanation:
Serratia marcescens -
They are the species ,that are , gram - negative bacteria , rod - shaped ,
they are from the family of Enterobacteriaceae .
Serratia marcescens are mostly found in the urinary and respiratory tracts of the hospitalized adults and in children , in the gastrointestinal systems .
S. Mercescens are most commonly found in the environment , growing the bathroom and dirt .
It is gram-negative, produces a reddish - orange tripyrrole pigment called the prodigiosin , is an example of phenotype .
Answer:
The outside of the bone consists of a layer of connective tissue called the periosteum. Additionally, the outer shell of the long bone is compact bone, then a deeper layer of cancellous bone (spongy bone) which contains in the medullary cavity the bone marrow.
