What is a major limitation of using a dichotomous key for classifying organisms?

Phylogenetic Relationships and Evolution Concepts

Interactive Video
•
Biology, Science, Other
•
9th - 10th Grade
•
Hard

Patricia Brown
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
It is too complex for beginners.
It can lead to disagreements due to subjective traits like color.
It only works for extinct species.
It requires advanced DNA analysis.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following best describes the theory of evolution?
It is a method for classifying plants only.
It focuses solely on the physical traits of organisms.
It explains the creation of new species from scratch.
It describes changes in species over time and their shared ancestry.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do biologists describe the relatedness between species?
As closely or distantly related based on shared ancestry.
By their habitat preferences.
By their size and weight.
By their ability to interbreed.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is phylogeny primarily concerned with?
The study of how species are related through evolutionary history.
The genetic modification of organisms.
The study of physical traits of organisms.
The classification of plants and animals based on color.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a phylogenetic tree, what does a node represent?
A geographical location.
A living species.
A common ancestor shared by different species.
A physical trait of an organism.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of a 'most recent common ancestor' in a phylogenetic tree?
It is the ancestor that is still alive today.
It is the ancestor that has no descendants.
It is the last shared ancestor of two or more species.
It is the ancestor of only one species.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a clade in the context of phylogenetic trees?
A single species with no relatives.
A group of organisms that share a common ancestor and all its descendants.
A group of organisms that live in the same habitat.
A classification based on physical appearance only.
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