Self-study
Ticks attach themselves to host animals to feed. ██████ ███ ██ █████████ ███ ███ ██████ █████ ███ █████ ████ ███ █████ █████ ████ █████ ███████ ███ ████████████ ████ ██████████ ████ ███ █████ █████ ███████ ████ ███ ███████ ██████████ ██ ████ ██ ███████████ ████████████ ████ ███ ████████ █████████ ███████ ████ █████ ███ ███████ █████ ██ █████ ███████████ ██████
Summary
Ticks attach themselves to other animals to feed on them. Ticks drop off their host only after they have fed to capacity. And, if they have fed to capacity, they will drop off their host.
Deer ticks that feed on white-footed mice always drop off their hosts between noon and sunset, no matter when the ticks first attached to the host.
White-footed mice are strictly nocturnal (they are active only at night). During daytime hours, these mice are underground.
Very Strongly Supported Conclusions
Deer ticks that feed on white-footed mice always drop from the mice they’re feeding on while the mice are underground. We know this is supported because the deer ticks always drop off during the daytime, and during the daytime the mice are underground.
5.
Which one of the following ███████████ ███ ██ ████████ █████ ████ ███ ██████████ ██████
a
Deer ticks all ██████ ██████████ ██ ████████████ ████ ██████ ███ ████ ████ ██ ███ ████ ██████████ ██ ███ ██ ███████████
We don’t know anything about when deer ticks attach themselves to mice. We know when they drop off the mice, but that doesn’t reveal anything about the timing of attachment.
b
Deer ticks sometimes ████ ███ █████ █████ ███████ ██████ ███ ██ ████
Ticks drop off only after feeding to capacity. So it can’t be true that deer ticks sometimes drop off without feeding at all.
c
Deer ticks that ████ ███ ████████████ ████ ████ ███ █████ █████ ██ ███ ██████ ██████
This is strongly supported, because we know the ticks always drop off from the mice during the daytime, and during the daytime, the mice are in their underground nests.
d
White-footed mice to █████ ████ █████ ████ ████████ ██████████ ███ ███ █████ ██ ███ ██████
We know nothing about the awareness of the white-footed mice. None of the facts suggest anything about whether the mice know the ticks are feeding on them.
e
White-footed mice are █████ ██ ██████ ███████ ██ ████ ██████ ██████████ ██ ██████ ██ ███ █████
We know nothing about the stability of the numbers of deer ticks that feed on white-footed mice.