The blood-brain barrier is made up of

a. ependymal cells and venous blood vessels.
b. astrocyte perivascular feet and capillary endothelial cells.
c. microglial extensions and capillary endothelial cells.
d. astrocyte extensions and dural sinuses.
e. astrocyte perivascular feet and the falx cerebri.

Kara has a plant that produces either purple or white flowers. she crosses a plant that has two recessive alleles for white flowers with a plant that has two dominant alleles for purple flowers. which result would be true of all of the offspring? a) all of the offspring would have two recessive alleles and white flowers. b) all of the offspring would have two dominant alleles and purple flowers. c) all of the offspring would have one recessive allele, one dominant allele, and white flowers. d) all of the offspring would have one recessive allele, one dominant allele, and purple flowers