The embedded peptides in MHC proteins are normally derived from breakdown products of cell metabolism
Indicate whether the statement is true or false.
Answer: TRUE
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A woman with normal blood clotting mates with a man who also has normal blood clotting. Their first
child is a boy who has hemophilia. Tests show that the child's hemophilia is X-linked and that he has normal genetic inheritance. You can predict that if the couple produces more children together, then the odds are that
a. all of the children will have hemophilia. b. half of the boys and none of the girls will have hemophilia. c. none of the rest of children should have hemophilia. d. all of the boys and half of the girls will have hemophilia. e. half of the boys and half of the girls will have hemophilia.
Marine organisms contain ____ % water by mass
a. 40-50 b. 50-60 c. 60-70 d. 70-80 e. 80-90
Most of our food crops come from angiosperms.
Answer the following statement true (T) or false (F)
The tube feet of sea stars are used primarily for
a. excretion of excess water. b. locomotion. c. reproduction. d. circulation. e. sensation