Question

what is a limitation of phylogenetic analyses?
a. clear ancestral reconstructions
b. no impact from missing data
c. missing genetic sequences leading to inaccuracies
d. complete data availability

what does a split in a phylogenetic tree signify?
a. a common ancestor from which the species diverged
b. an environmental change affecting the species
c. the extinction of one of the species involved
d. the unrelatedness of the species involved

which statement about classification based on phylogenetics is true?
a. it doesnt consider evolutionary relationships
b. it doesnt use phylogenetic trees
c. it categorizes organisms solely by physical appearance
d. it arranges organisms based on their evolutionary relationships

Explanation:

• For the first question, missing genetic sequences can lead to inaccuracies in phylogenetic analyses, which is a limitation. Clear ancestral reconstructions and complete data availability are not limitations, and phylogenetic analyses are affected by missing data.
• For the second question, a split in a phylogenetic tree represents a common ancestor from which species diverged. It is not about environmental change, extinction, or unrelatedness.
• For the third question, classification based on phylogenetics arranges organisms according to their evolutionary relationships. It does consider evolutionary relationships and uses phylogenetic trees, and does not categorize solely by physical appearance.

Answer:

1. c. Missing genetic sequences leading to inaccuracies
2. a. A common ancestor from which the species diverged
3. d. It arranges organisms based on their evolutionary relationships