A hypothesis is a(n) ________
A) tentative answer to a question
B) guess
C) observation
D) theory
A
You might also like to view...
Normal fruit flies have red eyes. Flies with mutations that block the function of the X-linked white gene have white eyes. The wild-type allele is completely dominant to mutant alleles. A cross between a white-eyed female fruit fly and a red-eyed male would generate which of the following types of progeny?
A) red-eyed females and white-eyed males B) white-eyed females and red-eyed males C) all red-eyed females and a 50:50 mixture of white-eyed and red-eyed males D) all red-eyed males and a 50:50 mixture of white-eyed and red-eyed females E) The result cannot be predicted because it depends on whether the female is homozygous or heterozygous.
What do the DNA sequences found at the origins of replication signify?
What will be an ideal response?
The neuron requires a certain level of depolarization of its membrane in order to generate an action potential. This level of depolarization is known as the ________
Fill in the blank(s) with correct word
The two-signal activation process for T cells includes
A) interaction of the T-cell receptor with the MHC-antigen complex on the APC AND binding between co-stimulatory proteins on the T cell and APC surfaces. B) the presence of a superantigen and the presence of appropriate antibodies. C) interaction of the T-cell receptor with the MHC-antigen complex on the APC AND the presence of a superantigen. D) the presence of antibodies AND binding between co-stimulatory proteins on the T cell and APC surfaces. E) the presence of a superantigen AND binding between co-stimulatory proteins on the T cell and APC surfaces.