Question

protists arent monophyletic, meaning that they dont
a) share one common ancestor that isnt also shared by organisms in other groups.
b) have one chromosome.
c) have one mode of reproduction.
d) live their lifespan in one place but instead can move.

question 7 (5 points)
listen
how can dna be useful in phylogeny?
a) dna sequences are rearranged to predict how species could evolve in the future.
b) dna from every organism in a clade is sequenced to identify genetic mutations that have occurred.
c) dna isnt useful in phylogeny, as morphological characteristics are used exclusively in phylogeny.
d) dna sequences from different species can be compared, giving us more

Explanation:

First Question (about Protists not being monophyletic)

Monophyletic groups include a common ancestor and all its descendants. If protists aren't monophyletic, they lack a unique common ancestor (not shared with other groups). Options B (chromosome count), C (reproduction mode), and D (mobility/location) don't relate to monophyly's definition (ancestral relationships).

Question 7 (How DNA is useful in phylogeny)

Phylogeny studies evolutionary relationships. Comparing DNA sequences (e.g., for similarity) helps infer relatedness (more similar DNA = closer evolution). Option A is wrong (DNA doesn't predict future evolution). Option B is not the main use (phylogeny uses comparisons, not just identifying mutations in a clade). Option C is wrong (DNA is very useful in phylogeny, morphology isn't exclusive).

Answer:

A) share one common ancestor that isn't also shared by organisms in other groups.