Brooks Biodiversity Unit 3 Exam UPDATED ACTUAL Exam Questions and CORRECT Answers
5 views 0 purchase
Course
Brooks
Institution
Brooks
Brooks Biodiversity Unit 3 Exam
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Plants Architecture - CORRECT ANSWER- Plant needs
i. collection & conversion of solar energy -> leaves
ii. positioning & support of leaves -> stems
iii. anchorage & absorption -> roots
iv. transport ...
Brooks Biodiversity Unit 3 Exam
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Plants Architecture - CORRECT ANSWER✔✔- Plant needs
i. collection & conversion of solar energy -> leaves
ii. positioning & support of leaves -> stems
iii. anchorage & absorption -> roots
iv. transport -> vascular system
Epidermis - CORRECT ANSWER✔✔- outermost cell layer of a plant body
cutin: (wax) excreted by epidermis
Cuticle - CORRECT ANSWER✔✔- Waxy waterproof covering of a plant.
Produced by the epidermis and has wax to resist desiccation.
Guard Cells - CORRECT ANSWER✔✔- Responsible for opening and closing stomata.
Works together with stomata to regulate gas exchange.
Prevents movement of water ACROSS surface
Stomata - CORRECT ANSWER✔✔- Small openings on the underside of a leaf through
which oxygen and carbon dioxide can move.
Mostly on lower surfaces, sometimes on upper surfaces. Found on both surfaces.
Allows for gas exchange.
Parenchyma - CORRECT ANSWER✔✔- Ground tissue that forms the bulk of the mesophyll
Can be modified into collenchyma and sclerenchyma
Thin and flexible cells
Most common and versatile ground tissue
Used for metabolic functions and storage of organic products
Palisade & Spongy layers - CORRECT ANSWER✔✔- Palisade layer: where light dependent
reactions occur, near the surface. Top part of the mesophyll in dicot plants.
Spongy mesophyll or spongy parenchyma: soft lower layer. Has access to CO2 through
stomata. Kelvin Cycle: where carbon fixation occurs, converting nonorganic CO2 into sugars.
Vein (Vascular bundle) - CORRECT ANSWER✔✔- Transports materials throughout the leaf
and contains the xylem and phloem.
Separating the VB = damage.
Xylem - CORRECT ANSWER✔✔- (Xylem Up)
Distributes water from roots throughout
Aimed towards stem
, Red
Tells age of tree
Contains: tracheids & vessel members
Tracheids - CORRECT ANSWER✔✔- Thin, hollow, narrow tube, dead cells with
perforated, tapered ends.
Vestigial structure
First kind of tube made
Present in early vascular plants and present in angiosperms and gymnosperms (slow flow)
Vessel Members - CORRECT ANSWER✔✔- Thick, hollow, wide tube, dead cells with large
holes on end.
Clearly visible
Phloem - CORRECT ANSWER✔✔- (Phloem Down)
Distributes the products of photosynthesis (sugary water) to plants tissues.
Blue
Contains: Sieve tube members (element) & Companion cells
Sieve Tube Members - CORRECT ANSWER✔✔- hollow, living cells with perforated cells
Companion Cells - CORRECT ANSWER✔✔- living cells that help keep sieve tube member
cells alive.
Production of sugars in Kelvin Cycle require transportation done by companion cells into
phloem
Which 4 cell types is most active metabolically when fully functional? - CORRECT
ANSWER✔✔- companion cells
Epidermis in Trees - CORRECT ANSWER✔✔- is replaced by bark or cork. Produced by the
cork cambium (tissues that produce other tissues).
Cork (dead) = phloem (alive)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller MGRADES. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
