This conifer has quite distinctive round cones with multiple prickles on each cone scale and awl-shaped needles (like a long triangle). What species is it?
[ Select ]
Western redcedar
Sitka spruce
Bald cypress
Coast redwood
Bristlecone pine
Douglas-fir
Giant sequoia
Dawn redwood
Ponderosa pine
Yellow cedar
Japanese cedar

Question

This conifer has quite distinctive round cones with multiple prickles on each cone scale and awl-shaped needles (like a long triangle). What species is it? 
[ Select ]
Western redcedar
Sitka spruce
Bald cypress
Coast redwood
Bristlecone pine
Douglas-fir
Giant sequoia
Dawn redwood
Ponderosa pine
Yellow cedar
Japanese cedar

BlackTom AI · Accepted Answer

Question restatement: The prompt describes a conifer with distinctive round cones that have multiple prickles on each cone scale and awl-shaped needles (resembling a long triangle), and asks you to identify the species from the provided list.
Option 1: Western redcedar. This species (Thuja plicata) has small, rounded cones that are not notably bristly, and its needles are in flat sprays rather than the characteristic awl-shaped form described. The description does not match well.
Option 2: Sitka spruce. Spruce cones are round to cylindrical and seated on branches; they lack the prickly bristles on scales and the needles are sharp, short, and square cross-section, not awl-shaped like the prompt suggests. The bristly-scale feature is not a hallmark of Sitka spruce.
Option 3: Bald cypress. Bald cypress (Taxodium distichum) has small, rounded seed cones with smooth scales, and its needles are deciduous, arranged in a feather-like fashion on twiglets, not in awl-shaped bundles. The given cone scale prickles are not typical here.
Option 4: Coast redwood. Sequoia sempervirens produces large rounded cones with relatively smooth scales and no prickly bristles; its needles are soft, not awl-shaped, and the cones are not described as bristly. This option does not fit.
Option 5: Bristlecone pine. Bristlecone pine (Pinus longaeva) is famous for very distinctive round cones with multiple bristle-like pricks on each cone scale and awl-shaped needles forming tight, sharp bundles. The bristle on the cone scales (hence the name) is a key identifying feature matching the description given.
Option 6: Douglas-fir. Douglas-fir cones are elongated and have smooth scales without the bristly prickles described; the needles are flat and attached differently, so this option doesn’t align with the description.
Option 7: Giant sequoia. Giant sequoia cones are small, with relatively smooth scales and lack the conspicuous bristle-prickles on each scale; needles are not described as awl-shaped. This option is inconsistent with the prompt.
Option 8: Dawn redwood. Dawn redwood cones are small and not notably bristly; its deciduous needles are not arranged in the awl-shaped pattern described, so this is unlikely to match.
Option 9: Ponderosa pine. Ponderosa pine cones have distinctively large, woody scales but typically do not bear multiple bristles on each scale; needles are in bundles of three, not prominently awl-shaped in the sense described, so it’s a weaker match.
Option 10: Yellow cedar. Yellow cedar cones are small and smooth-scaled, with foliage that differs from the awl-shaped needle description; the bristle-prickle feature on cone scales is not characteristic here.
Option 11: Japanese cedar. Japanese cedar cones are small to medium and lack the bristly scales described; needles are typically in sprays and not the described awl-shaped arrangement. This option does not fit well.
Overall assessment: Among all listed species, the description of round cones with multiple prickles on each cone scale and awl-shaped needles most accurately aligns with Bristlecone pine, whose cone scales carry bristle-like projections and whose needles are distinctly awl-shaped. The other species either have cones without prickly bristles, different cone shapes, or needles lacking the described awl-like form, making them poor matches to the prompt’s identifying features.

FRST_V 303 101-107 2025W1 Final Exam Sections 103-104- Requires Respondus LockDown Browser

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