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Support If newly hatched tobacco hornworms in nature first feed on plants from the nightshade family, they will not eat leaves from any other plants thereafter. ████████ ███████ █████████ ████ ████ ██ █████ █████ ██ ██████ ██ ████ ████ ██ ██████ █████ ████ ███████████ ████ █████ █████████ ██ ███████ ████ █████████ ██████████ ███████████ ████ ████ █ ██████████ █████ ████ ██ ████ █ ███████████ ███ █████ █████████ ██████ ██████████ ██ ███ ████████ █████████ ██ █████ ██ █████ ████ ██ ████████████ ███ █████ ████ ███████████ ███████ ███████ █████████ █ ██████ █████
Summarize Argument: Phenomenon-Hypothesis
Scientists hypothesize that when a hornworm’s first meal is from a nightshade, its taste receptors become habituated to indioside D, and afterward anything without indioside D doesn’t taste good. This is based on the fact that newly hatched hornworms that first feed on nightshades don’t eat leaves from non-nightshades afterward, whereas newly hatched hornworms that first feed on non-nightshades are open to eating non-nightshades afterward.
Notable Assumptions
The author assumes that there isn’t another explanation for the observed diet patterns of hornworms. For example, what if there’s some other chemical besides indioside D that might be the reason hornworms that eat nightshades prefer nightshades and don’t eat non-nightshades? Or what if the hornworms don’t necessarily care about the taste of nightshades, but become physically addicted to it, without regard to taste?
6.
Which one of the following, ██ █████ ████ ███ ████ ███████ ███ ███ ███████████
a
Tobacco hornworms that █████ ███ ██ ██████████ ██████ ████ ██ ██████████ ███ ███ ███ ███████ ██ ██████████ █████ ████ ███ ██████
b
If taste receptors ███ ███████ ████ ███████ █████████ ████ █████ ███ ██ ██████████ ███████ █████ █████████ ████ ████████████ ████ ██ █████ ███████
c
Tobacco hornworm eggs ███ ████ ████████ ████ ██ ██████████ ███████
d
Indioside D is ███ ███ ████ ████████ ████ ██████ ████ ██ ██████████ ███████
e
The taste receptors ██ ███ ███████ ████████ ████ █████████████ █████████ ██ ███████ █████████ █████████ ██████████