Biology 1108 - Exam 2 Plant Diversity
Questions with Correct Answers 2025
Primary producers - CORRECT ANSWER -base of many food chains
-fuel, fiber, habitat
-photosythesis
Three domains - CORRECT ANSWER -two prokaryotic groups: bacteria and archaea
Eukaryotic group: eukarya
All eukaryotes share - CORRECT ANSWER -membrane bound nucleus and other organelles
-there are many lineages of clades of eukarya, most of them are unicellular
Protist - CORRECT ANSWER -all eukarya except land plants, fungi, and animals
-simple cellular organization
-abundant in aquatic environemtns
-7 major clades
Algae - CORRECT ANSWER -photosynthetic organisms that occur in several different clades
-land plants evolved from a green algal ancestor
Primary endosymbiosis - CORRECT ANSWER -
protist engulfed cyanobacteria led to the first photosynthetic eukaryote
Five characteristics of green algae - CORRECT ANSWER -1. Have a range of growth forms
2. Wide variety of habitats
, 3. Chlorophyll a and b
4. Starch is a storage product in plastids
5. Cell wall with cellulose
When did plants move onto land? - CORRECT ANSWER -475 million years ago
-evidence from unicellular, haploid spores containing sporopollenin
Bryophytes - CORRECT ANSWER -earliest diverging group of plants -
mosses, liverworts, hornworts
Synapomorphies:
1. Cuticles
2. Stomata
Characteristics of bryophytes - CORRECT ANSWER --small
-non-vascular
-no true roots or leaves - rhizoids for water uptake
-no secondary cell walls of any kind
-haploid
Key differences between coleochaetes&stoneworts and bryophytes - CORRECT ANSWER -
1. There is both a multicellular haploid phase and a multicellular diploid phase
2. The egg is fertilized in the archegonia
Alternation of generations - CORRECT ANSWER -
there is both a multicellular haploid phase and a multicellular diploid phase -
so a haploid generation and a diploid generation
-all land plants have an alternation of generations
Questions with Correct Answers 2025
Primary producers - CORRECT ANSWER -base of many food chains
-fuel, fiber, habitat
-photosythesis
Three domains - CORRECT ANSWER -two prokaryotic groups: bacteria and archaea
Eukaryotic group: eukarya
All eukaryotes share - CORRECT ANSWER -membrane bound nucleus and other organelles
-there are many lineages of clades of eukarya, most of them are unicellular
Protist - CORRECT ANSWER -all eukarya except land plants, fungi, and animals
-simple cellular organization
-abundant in aquatic environemtns
-7 major clades
Algae - CORRECT ANSWER -photosynthetic organisms that occur in several different clades
-land plants evolved from a green algal ancestor
Primary endosymbiosis - CORRECT ANSWER -
protist engulfed cyanobacteria led to the first photosynthetic eukaryote
Five characteristics of green algae - CORRECT ANSWER -1. Have a range of growth forms
2. Wide variety of habitats
, 3. Chlorophyll a and b
4. Starch is a storage product in plastids
5. Cell wall with cellulose
When did plants move onto land? - CORRECT ANSWER -475 million years ago
-evidence from unicellular, haploid spores containing sporopollenin
Bryophytes - CORRECT ANSWER -earliest diverging group of plants -
mosses, liverworts, hornworts
Synapomorphies:
1. Cuticles
2. Stomata
Characteristics of bryophytes - CORRECT ANSWER --small
-non-vascular
-no true roots or leaves - rhizoids for water uptake
-no secondary cell walls of any kind
-haploid
Key differences between coleochaetes&stoneworts and bryophytes - CORRECT ANSWER -
1. There is both a multicellular haploid phase and a multicellular diploid phase
2. The egg is fertilized in the archegonia
Alternation of generations - CORRECT ANSWER -
there is both a multicellular haploid phase and a multicellular diploid phase -
so a haploid generation and a diploid generation
-all land plants have an alternation of generations
