Invertebrate Introduction

Question 1

On a phylogenetic tree, time progresses from the past to present when one looks from the branch tip to the root of the tree (T/F)

Answer 1

False; time travels root to tip

Question 2

For a mutation to affect evolution, it must _____________.

Answer 2

Get passed on from parent to offspring

Question 3

Parasite species often co-evolve with their host species (T/F)

Answer 3

True

Question 4

What does “the fittest” mean in an evolutionary sense?

Answer 4

The most reproductively successful

Question 5

Evolution proceeds….

Answer 5

Neither entirely fixed nor random

Question 6

Define “taxon” and the comparisons made to determine if organisms belong in the same taxon

Answer 6

Taxon: all organisms within a named group with a high degree of similarity in morphology, genetics, and physiology

Question 7

Define “monophyletic group”

Answer 7

A singular evolutionary line

Question 8

Define “paraphyletic group”

Answer 8

An evolutionary line with a common ancestor but it does NOT contain all descended species (e.g. vertebrate descendants of invertebrates)

Question 9

Define “node”

Answer 9

A branching point; represents a common ancestor at the time of divergence.

Question 10

All animals likely evolved from…

Answer 10

Flagellated forms