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BIOLOGY 106 EXAM 2 QUESTIONS & ANSWERS SCORED A+ $7.99   Add to cart

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BIOLOGY 106 EXAM 2 QUESTIONS & ANSWERS SCORED A+

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  • BIOLOGY 106
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  • BIOLOGY 106

what is the precise composition of sporopollenin? - Its precise composition is unknown but it contains phenolic substances, fatty acids, and phenylpropanoids There are four key traits that land plants share only with charophyceans. what are they? - 1. structure of flagellated sperm, 2. rose sha...

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  • September 8, 2024
  • 41
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • BIOLOGY 106
  • BIOLOGY 106
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ACADEMICMATERIALS
BIOLOGY 106 EXAM 2
what is the precise composition of sporopollenin? - Its precise composition is unknown but it
contains phenolic substances, fatty

acids, and phenylpropanoids



There are four key traits that land plants share only with charophyceans. what are they? - 1.
structure of flagellated sperm, 2. rose shaped complexes for cellulose synthesis, 3. peroxisome enzymes
(photorespiration), 4. formation of a phragmoplast



what is the mesophyll? - The ground tissue of a leaf is

sandwiched between the upper and lower epidermis in the region



what is the purpose for the phloem? - transports organic nutrients from where they are made to
where they are needed



what is ground tissue? - Includes various cells specialized for functions such as storage,
photosynthesis, and support



what are the two groups of angiosperms? - monocots and dicots



difference between angiosperms and germosperms? - more integuments



seed advantages in comparisons to spores? - Multicellular, protection, and nutrition



The bud is the starting point for what? - the leaf



What is the difference between a root and a shoot? - roots don't have nodes but shoots do.



each plant organ has what 3 tissue systems? - dermal, vascular, and ground tissues

,the dermal tissue system consists of what? - the epidermis and periderm



dermal tissues do not have what? - chloroplasts



dermal tissue is usually how many layers of tightly packed cells? - one



how long ago did angiosperms originate? - at least 140 million years ago



what does the vascular tissue system do? - carries out long-distance transport of materials
between roots and shoots



the vascular tissue system consists of what two tissues? - xylem and phloem



what is the purpose for the xylem? - conveys water and dissolved minerals upward from roots into
the shoots




a plant is characterized by what? - cellular differentation



what is cellular differentiation? - the specialization of cells in structure and function



Parenchyma, Collenchyma, and Sclerenchyma are water conducting cells where? - xylem



Parenchyma, Collenchyma, and Sclerenchyma are sugar conducting cells where? - phloem



is parenchyma living or dead? - living

,is collenchyma living or dead? - living



is sclerenchyma living or dead? - dead



sexual reproduction often depends on what? - animals



what are some biopolymers? - starch, cellulose



Plant Diversity, how Plants colonized land:

For more than the FIRST 3 BILLION YEARS of earths history the terrestrial surface was what? -
lifeless



Since colonizing land

- Plants have diversified into roughly how many living species? - 290,000



Land plants evolved from what? - green algae



Researchers have identified what as the closest relatives of land plants? - green algae called
charophyceans



Many characteristics of land plants also appear in what? - a variety of algal clades




what are peroxisomes? - Peroxisomes are small (200 - 500 nm in radius) vesicles in the

cytoplasm in which in many detoxification reactions take place



what genetic evidence point to charophyceans as the closest living relatives of land plants? -
Comparisons of both nuclear and chloroplast genes

, what adaptations enable the move to land? - In charophyceans a layer of a durable polymer called
sporopollenin prevents exposed zygotes from drying out



where can you find sporopollenin? - Charophyceans, Spores of Mosses and seedless plants, and
Pollen of seed plants



sporopollenin is what and results from the composition of what? - It is a biopolymer and results
from the composition of different precursors.



what is a biopolymer? - results from the composition of different precursors




what are systematists? - define the plant kingdom. Are currently debating the boundaries of the
plant kingdom



what derived adaptations allow the move to land? - Land plants possess a set of derived
terrestrial adaptations



what 5 key traits appear in nearly all land plants but are absent in the charophyceans? - 1.
Apicalmeristems

2. Alternationofgenerations

3. Walled spores produced in sporangia

4. Multicellular gametangia

5. Multicellular dependent embryos



Alternation of generations has what 2 different generations? - Haploid+multicellular

Diploid+multicelluar



What additional derived units help survival on land? - a cuticle and secondary compounds,
evolved in many plant species

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