Question 1

Which of the following best describes a synapomorphy?

Accepted Answer

A trait that is shared by two or more taxa and is derived from their most recent common ancestor.

Question 2

Which of the following scenarios is an example of homoplasy?

Accepted Answer

The presence of wings in both bats and birds, which evolved independently.

Question 3

Which process is responsible for the formation of the nucleus and endoplasmic reticulum in eukaryotic cells, according to current hypotheses?

Accepted Answer

Infolding of the archaeal cell membrane.

Question 4

Which of the following best explains why the presence of lignin in vascular plants was a key evolutionary innovation?

Accepted Answer

Lignin strengthens cell walls, enabling plants to grow taller and transport water efficiently.

Question 5

A researcher is comparing the genetic sequences of a developmental gene in mice and fruit flies. She finds that the gene is highly conserved and controls similar developmental processes in both organisms. This is an example of:

Accepted Answer

Deep homology

Question 6

Which of the following statements about alternation of generations in plants is correct?

Accepted Answer

The sporophyte is diploid and produces haploid spores by meiosis.

Question 7

Which of the following is a distinguishing synapomorphy of the Archaeplastida clade?

Accepted Answer

Primary endosymbiosis of a cyanobacterium leading to chloroplasts.

Question 8

Which of the following best describes the difference between homology and homoplasy?

Accepted Answer

Homology refers to traits inherited from a common ancestor, while homoplasy refers to traits that arise independently in different lineages.

Question 9

Which of the following is a correct sequence of events in the evolution of eukaryotic cells?

Accepted Answer

Infolding of the cell membrane, development of a cytoskeleton, endosymbiosis of an aerobic prokaryote.

Question 10

Which of the following best explains why polytomies appear in phylogenetic trees?

Accepted Answer

They represent uncertainty or lack of resolution about the evolutionary relationships among lineages.

Question 11

Which of the following is a key difference between the life cycles of Basidiomycota and Ascomycota fungi?

Accepted Answer

Basidiomycota produce 4 spores per basidium, while Ascomycota produce 8 spores per ascus.

Question 12

A plant biologist discovers a fossilized plant with vascular tissue, true roots, and seeds, but no flowers. To which group does this plant most likely belong?

Accepted Answer

Gymnosperms

Question 13

Which of the following best describes the role of morphogens in animal development?

Accepted Answer

Morphogens are signaling molecules that form gradients and help determine cell fate during development.

Question 14

Which of the following is a correct statement about the evolutionary trend in the dominance of plant life cycles?

Accepted Answer

Non-vascular plants are gametophyte-dominated, while vascular plants are sporophyte-dominated.

Question 15

Which of the following best explains the significance of the Wood-Ljungdahl pathway in early life evolution?

Accepted Answer

It is a carbon fixation pathway used by some chemoautotrophs, possibly present in LUCA.

Question 16

Which of the following is a function of Hox genes in animal development?

Accepted Answer

They regulate the identity and arrangement of body segments along the anterior-posterior axis.

Question 17

Which of the following is a correct description of the difference between microspores and megaspores in seed plants?

Accepted Answer

Microspores develop into male gametophytes, while megaspores develop into female gametophytes.

Question 18

Which of the following best describes the evolutionary significance of the Cambrian Explosion?

Accepted Answer

It marks a rapid diversification of multicellular animal body plans.

Question 19

Which of the following is a correct statement about the difference between yeast and mycelial fungi?

Accepted Answer

Yeasts are unicellular, while mycelial fungi are multicellular and composed of hyphae.

Question 20

Which of the following best explains why the presence of sporopollenin was a key adaptation for the colonization of land by plants?

Accepted Answer

Sporopollenin protects spores and pollen from desiccation and UV radiation.

Phylogeny, Evolution, and Major Lineages: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards