100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Bio 240 Plant Section || 100% SOLVED QUESTIONS. $11.29
Add to cart
Quickly navigate to
Preview
  2.  
  3. Bio 240
  4.  
  5. Bio 240

Exam (elaborations)

Bio 240 Plant Section || 100% SOLVED QUESTIONS.
 0 purchase
  • Course
  • Bio 240
  • Institution
  • Bio 240

Charyphyta correct answers algae, most related to land plants due to similar photosynthetic pigments, cell wall chemistry, storage products, MIOTIC CHARACTERISTICS, and distinctive enzyme systems Sporophyte correct answers diploid stage, which produces haploid spores by meiosis Gametophyte co...

[Show more]

Preview 2 out of 7  pages

Document information

  • October 10, 2024
  • 7
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

Written for

  • Bio 240
  • Bio 240

Seller

avatar-seller
ProPerfomer

Reviews received

Content preview

Bio 240 Plant Section || 100% SOLVED QUESTIONS.
Charyphyta correct answers algae, most related to land plants due to similar photosynthetic
pigments, cell wall chemistry, storage products, MIOTIC CHARACTERISTICS, and
distinctive enzyme systems

Sporophyte correct answers diploid stage, which produces haploid spores by meiosis

Gametophyte correct answers haploid stage, which produces gametes by mitosis

What are plant cell walls composed of? correct answers Cellulose

What is the main nutrition mode for plants? correct answers they are autotrophic by
photosynthesis, which occurs in the chlorophyll in the chloroplast

What are the two main vascular tissues in plants? correct answers Xylem and phloem

Name a species in the Hepaticophyta phylum seen in class correct answers Liverworts

Name a species in the Bryophyta phylum seen in lab correct answers Mosses

Name a species in the Anthocerophyta phylum correct answers Hornworts

Key points to remember about Primitive plants; mosses, liverworts, hornworts correct
answers -Their gametophyte stage is DOMINANT
-lack true vascular tissue
-Differentiated leaves, stems and roots
-have flagellated sperm (still need water to reproduce like algae relatives)
-all HOMOSPORUS

What are the two types of Hepaticophyta (liverworts)? correct answers -Thalloid (ribbon-
shaped thallus with irregular branching (merchantia)
-Leafy liverworts divided into segments that resemble leaves

Features of Bryophyta (mosses) correct answers more or less erect, elongated cells in stem
act as vascular system: Look for rhizoids attached to basal portion, gametophyte with
attached sporophyte

Key points to remember about Primitive Vascular plants correct answers -THEY HAVE
XYLEM AND PHLOEM for transport of sugar and water
-sporophyte stage is dominant
-gametophyte is reduced but still free living organism
-all contain vascular tissue, stems, roots, leaves, and specialized reproductive organs
-some have strobili
- can be heterosporus, homosporus, or both

What are strobili? correct answers reproductive structures called cones

What phyla are included in the primitive vascular plants? correct answers Psilophytes (whisk
ferns)

, Lycophyta (club mosses)
Sphenophyta (horsetails)
Pterophyta (ferns)

What do horsetails have for anti-herbivory? correct answers SILICA!

are selaginella heterosporous or homosporous? correct answers heterosporous

are huperzia homosporous or heterosporous? correct answers homosporous

Define Homospory correct answers -The sporophyte produces a single type of sporangium
-Sporangium then produces a single type of spore mother cell (SMC)
-SMC undergoes meiosis to produce four haploid spores capable of becoming multicellular
gametophytes which may produce both antheridia and archegonia within same gametophytes

Define Heterospory correct answers -Sporophyte produces two types of sporangia/ separation
of sexes:
-Microsporangia contain microspore mother cells each of which undergoes meiosis forming
microspores- grow into microgametophytes that posses antheridia (male); microspores are
smaller since need to travel further from sporophyte
-Megasporangia contain megaspore mother cells-undergoes meiosis forming megaspores
that grow into megagametophytes with archegonia (female portion); female portion bigger
since required more nutrients/energy to produce eggs

Endosporic Development correct answers -Megaspores "germinate" on the ground the
resulting megagmetophyte does not leave the megaspore
-it is retained throughout its development within the megasporangial wall
-this is a significant evolutionary trend toward further protection of the megagametophyte,
most advanced in SEED PLANTS
-megagametophytes are retained inside ovules, female parental tissue provides developing
embryo with nutrients (sugars & amino acids)=SEED

Reproductive adaptations in Conifers (pinus) correct answers -Conifers are the most
numerous gymnosperms today with pines among most advance
-Evolution of the seed occurred through a reduction in the female gametophyte stage and its
retention in/on the sporophyte
-The evolution of pollination occurred through the dispersal of the male gametophyte

what is germination? correct answers Germination in plants is the process by which a
dormant seed begins to sprout and grow into a seedling under the right growing conditions.

Gymnosperm Sporophyte correct answers =tree or bush (dominant stage)
-Cone/Strobilus from sporophyte composed of sporangia-bearing scales (modified leaves)
Sporangia on undersurface of the microsporophyll on the scales are microsporangia which
produce microspores that remain in the microsporangium and develop into the
microgametophyte

define microsporophyll correct answers modified leaves that bear sporangia

Define abiotic pollination correct answers wind or water

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

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

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 ProPerfomer. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $11.29. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

67479 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling
$11.29
  • (0)
Add to cart
Added