The ozone layer is found in which layer of the atmosphere?
What will be an ideal response?
stratosphere
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Emphysema is caused by an increase in elastase, an enzyme that breaks down elastin. Predict the symptoms you would expect to see in a patient with emphysema.
A. Decreased ability of the lungs to expand and contract. B. Thickening of the extracellular matrix. C. Thinning of vertebral discs. D. Thinning of the cell wall. E. Thickening of the cell wall.
Sexual reproduction
a. leads to uniform characteristics within a population. b. results in new combinations of genetic traits. c. creates genetic clones. d. requires less tissue differentiation than asexual reproduction. e. produces genetic clones and requires less tissue differentiation than asexual reproduction.
You are interested in sequencing the gene for Tangier disease (OMIM 205404). The disorder is rare, so it is feasible to obtain only very few samples. The approximate chromosomal location of the gene is known
How would you set about deciding on a model organism to use to study this disease, and what would you do once you had decided? (An outline of your procedure after the organism is chosen will be sufficient).
Anthropoids arose at least:a
45 million years ago. b. 22 million years ago. c. 10.2 million years ago. d. 5 million years ago. e. 2.6 million years ago.