Which of the following is the most fatal

genetic disorder in the United States?



a. cystic fibrosis
b. Huntington’s disease
c. sickle cell anemia
d. anhidrotic dysplasia
e. fibromyalgia


A

Biology & Microbiology

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Researcher discovers a new unicellular organism that contains a single circular chromosome and no membrane-bound organelles. Upon closer observation, the researcher notices that this organism can also fix nitrogen and produce methane

How should this organism be classified? A. as a bacterium B. as an archaeon C. as a eukaryote

Biology & Microbiology

Which would be most likely to be fossilized?

A. a small worm with all soft body parts. B. a thick-shelled oyster that lives under water. C. a small herb growing at the top of a mountain. D. an elephant trapped in a tar pit. E. a thick-shelled oyster that lives under water and an elephant trapped in a tar pit.

Biology & Microbiology

In chickens, females have two different sex chromosomes (Z and W), while the males have two Z chromosomes. A Z-linked gene controls the pattern of the feathers, with the dominant B allele causing the barred pattern and the b allele causing nonbarred feathers. Which of the following crosses would produce all daughters of one type (barred or nonbarred) and all sons of the other type?

A) barred females × nonbarred males B) nonbarred females × barred males C) nonbarred females × nonbarred males D) barred females × barred males E) More than one of the choices is correct.

Biology & Microbiology

Compare and contrast smooth muscle and skeletal muscle

What will be an ideal response?

Biology & Microbiology