Answers
ZOL1501 - Past Memos
- Institution
- University Of South Africa (Unisa)
Answers of 14 pages for the course ZOL1501 - Animal Diversity I at Unisa (ZOL1501 Past Memos)
[Show more]
3 reviews
By: nitacarstens26 • 4 year ago
By: adventuresofJafar • 4 year ago
By: britsjulie • 6 year ago
Content preview
ZOL1501ANIMAL DIVERSITY I
PAST MEMOS
, QUESTION 1 [10]
Explain what is meant by each of the following terms:
1.1 Monophyletic group
1.2 Parthenogenesis
1.3 Metamerism
1.4 Epitoke
1.5 Peritonium
QUESTION 1 (10)
a. Monophyletic group is a group that includes the most recent common ancestor of a
group of organisms, and all of its descendants.
b. Parthenogenesis is a unisexual reproduction involving the reproduction of young by
females not fertilized by males.
c. Metamerism is a condition of being composed of serially repeated parts (metameres).
Serial segmentation. Metamerism is a division of the body into discrete segments or
metameres.
d. Epitoke posterior part of a marine polychaete when swollen with developing gonads
during the breeding season.
e. Peritoneum is the membrane that lines the coelom and covers the coelomic viscera.
QUESTION 2 [16]
2.1 Define the concepts “encystment” and “excystment” and explain why the phenomena
have advantages for protozoa.
QUESTION 2 (16)
2.1 Encystment is a process of cyst formation. Dormant forms marked by resistant
external cover and a complete shutdown of metabolic machinery. This process of
escape from a cyst, a stage in the life cycle of parasites occurring after the cystic form
has been ingested by the host organism. Cyst formation is important to parasitic forms
that that must survive a harsh environment between hosts. Such harsh conditions
include food deficiency, desiccation, increased environmental osmotic pressure,
decrease oxygen concentration, and a change in pH or temperature. Encystment in the
protozoan is enclosed in or as if in a cyst, thick membrane, or shell. Excystment is the
escape from cysts, a return of favourable conditions initiates excystment for those
protozoa in which the cysts are resistant stage.
2.2 Give a detailed description of the different kinds of pseudopodia encountered in
protozoa.
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 EFT, 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 this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller cactii. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R100,00. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
53068 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 14 years now