Question

1. A dichotomous key for trees is provided. Hikers found
a tree that has large brown cones and single sharp
needles. What species of tree have the hikers found?
I a. Cones are small
b. Cones are large
a. Needles are single
b. Needles are in groups of 2 or more
a. Needles are sharp at the end
Ib. Needles are rounded at the end
Juniper
Go to step 2
Go to step 3
Pine
Spruce
O
O
Juniper
spruce
O
O
Pine
Fir

Answer 1

1. Cones are large

2. Needles are single

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Answer 2

Question:

A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and single sharp needles. What species of tree have the hikers found?

Key-

1. a. Cones are small - Juniper.

   b. Cones are large - Go to Step 2.

2. a. Needles are single - Go to Step 3.

    b. Needles are in groups of two or more - Pine.

3. a. Needles are sharp at the end - Spruce.

    b. Needles are rounded at the end -  Fir.

Answer:

Spruce

Explanation:

• Classification plays an important role in biology. As new species are discovered daily, it is important to have the skills to identify and classify them. One such tool is the 'dichotomous key'. It helps identify organisms by instructing the user to identify an unknown species of organism with the help of known organisms.
• "Dichotomous" means that it is divided into two parts. Therefore, the dichotomous key always offers two choices based on the key characteristics of the organism at each step. By choosing the right choice at each stage, the user can finally identify the name of the organism. The more the key is divided, the more one can learn about the sample to be identified.
• By following the key matching the characters that the hikers found of the cone we can easily conclude that the hikers found 'Spruce'

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