MINI Sickle-cell disease is a group of genetic disorders that affect hemoglobin, which is the
protein in red blood cells that binds to oxygen. The change to the hemoglobin molecule
causes the red blood cells to have a crescent or sickled shape. The diagram on this
question shows a fragment of the DNA sequence for hemoglobin in a person without
sickle-cell disease and in a person with the disease.
Why
INI!!
HOC
22
11111
What amino acid pair reflects the mutation leading to sickled red blood cells?
Q Zoom
A
Valine to Histidine
B
Glutamic acid to Valine
с
CTC and CTC
D
CAC and GGA
E
Glutamic acid to Glutamic acid

Complete the sentences by matching the names of trees to the appropriate blanks. to do this, drag the names on the left into the appropriate blanks in the sentences on the right. match the words in the left column to the appropriate blanks in the sentences on the right. terms may be used more than once. make certain you have filled every blank with a term before clicking submit. 1. deciduous trees lose their leaves seasonally and include trees such as maple and elm. 2. conifer leaves are generally thin and needle-like, while seeds are contained in cones. conifers include cedar and pine. 3. evergreens are plants that maintain their leaves in all seasons and include trees such as cedar, elm, and pine. 4. hardwoods reproduce using flowers and have broad leaves; hardwoods include trees such as maple, , and cedar. elm returned you filled in 2 of 10 blanks incorrectly. mango trees are tropical broad leaf plants that maintain their leaves all year long. no credit lost. try again.

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Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above