When one looks at the relationship between the density of meadow voles in a field and their rate of consumption by red-tailed hawks (which feed on meadow voles) one is looking at the red-tailed hawk's

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

the transfer for conduction is the heat transfering from the liquid to the spoon

the transfer for convection is the heat rising from the liquid to the air

the transfer for radiation is the heat going through the sides of the cup and to the air

at least that is what i would do

the missing space is phylum

the tricuspid valve is present between right atrium and right ventricle