Describe why there is no Rh factor conflict if the mother is Rh positive and the father is Rh negative.
What will be an ideal response?
If the father is Rh negative and the mother is Rh positive, the mother may carry an Rh negative child with no problems. A Rh negative child's red blood cells lack the Rh antigen. Even if there would be a problem with the pregnancy and fetal blood would leak into the mother, the Rh positive mother would not form antibodies to Rh negative child's blood, since it carries no antigens, or foreign substances that illicit an immune response. If the child were Rh positive, the mother would not make antibodies to its blood because she is Rh positive.
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If one left a "pasteurized" flask of broth for a long time at room temperature, it would stay sterile forever, at least in principle.
Answer the following statement true (T) or false (F)
How many years ago did the earliest primates arise?
a. ˜200 million years ago b. ˜125 million years ago c. ˜56 million years ago d. ˜22 million years ago e. ˜12.5 million years ago
The difference between geographic isolation and habitat differentiation (isolation) is the _____
A) relative locations of two populations as speciation occurs B) speed (tempo) at which two populations undergo speciation C) amount of genetic variation that occurs among two gene pools as speciation occurs D) identity of the phylogenetic kingdom or domain in which these phenomena occur
In estimating the causal relationship between Sales and Price in the following determining function Salesi = ?0 + ?1Pricei + Ui, what assumption in addition to E [Ui ] = 0, justifies that the estimated coefficient on Price can be interpreted as an estimate of the causal effect of Price on Sales?
A. E [SalesiUi ] = 0 B. E [PriceiUi ] = ?0 C. E [PriceiUi ] = ?1 D. E [PriceiUi ] = 0