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BIO 152 MODULE 3 EXAM PORTAGE LEARNING LATEST 2021
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BIO 152 MODULE 3 EXAM PORTAGE LEARNING LATEST 2021
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BIO 152 MODULE 3 EXAM PORTAGE LEARNINGLATEST 2024/2025 ALL QUESTIONS WITH 100%
CORRECT ANSWERS/ BIO 152 ANATOMY AND
PHYSIOLOGY MODULE 3 LATEST EXAM
Cell size - ANSWER 40 microliters
Characteristics of Plant Cells - ANSWER -cell walls
-plasma membrane
-large vacuoles
-chloroplasts
-starch grains can be present
-plasmodesmata
What do plant cell lack that animal cells have? - ANSWER lysosomes and
centrioles
Describe primary cell wall - ANSWER -flexible
-cellulose
Describe secondary cell wall - ANSWER -cellulose
-lignin
-other components
Describe Middle Lamella - ANSWER -protein rich layer
-cements together cell walls of adjacent cells
Describe Plasmodesmata - ANSWER -small tubes (cytoplamsic channels)
joining plant cells though pores in primary and secondary cell walls
-living bridge allowing molecules to pass cell to cell
-provide cell to cell communication
Plant Cell Types (4) - ANSWER -Parenchyma
-Collenchyma
-Sclererchyma
-Vascular (Xylem and Phloem)
Parenchyma Description - ANSWER -workhouse cells
-primary walls thin and flexible (no secondary)
-large vacuoles
-ALIVE at functional maturity
-abundant in fleshy part of fruit
What are vacuoles used for? - ANSWER water and solute storage
Parenchyma Function - ANSWER -totipotent "stem cells" regenerate cells that
are damaged
, -metabolism
-photosynthesis
-starch storage in stems and roots
Collenchyma Description - ANSWER -thick primary walls
-grouped in strands or cylinders
-ALIVE at functional maturity
Collenchyma Function - ANSWER -can elongate and expand with stem/leaf
growth
-flexible support for herbaceous and young woody plants
Sclerenchyma Description - ANSWER -thick secondary walls
-strengthened by lignin
-DEAD at functional maturity (lack protoplasts)
-contain Fibers and Sclereids
Sclerenchyma Function - ANSWER -cannot elongate with growth
-used for support
Fibers (Sclerenchyma) Description - ANSWER long slender and tapering in
bundles (rope,flax)
Sclereids a.k.a "stone cells" (Sclerenchyma) Description - ANSWER -short,
irregular shape
-make hard seed coat/nut shells
-gritty texture in pears
Groups of cells make up.... - ANSWER tissues
Root or shoot meristems produce... - ANSWER -protoderm
-ground meristem
-procambium
Protoderm creates.... - ANSWER dermal tissue system
Ground meristem creates... - ANSWER ground tissue system
Procambium creates... - ANSWER vascular tissue system
Vascular tissue definition? - ANSWER -continuous root tips to leaf bud (carrys
water across plant)
-structural support and transport
Vascular tissue types? (2) - ANSWER -Xylem
-Phloem
-both arranged in vascular bundles
Tracheids and Vessel Elements (Sclerenchyma) make up.... - ANSWER xylem
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