Week 8:
Animal Evolution & Development Follow Along Sheet
Final Concept Maps
Due this week on: For Monday & Tuesday Lifelines:
Friday, October 17th, 2014 at 11:59 p.m.
For Wednesday – Friday Lifelines:
Saturday, October 18th, 2014 at 11:59 p.m.
Don’t wait until the last minute to submit them!
Final date to withdraw (with a W) is Friday, October 10, 2014 by 5pm.
Week 8 Lifeline
Points for this Week:
2 Points PPP and 1 Extra Credit HW
Remember To Print The EC Homework!!
What is an Animal?
 Members of Kingdom Animalia are:
•
Eukaryotic and mostly multicellular
•
______________
•
Mostly ________
 Two unique types of tissues are
found only in animals:
______ Tissue
______ Tissue
 Most animals reproduce sexually.
The _______ stage usually dominant in the life cycle
Reproduction and Development
Fertilization occurs when a small flagellated sperm (n) fertilizes a larger, non-motile egg (n),
forming a diploid ________ (2n).
Cleavage
A series of rapid cell divisions by _______ and __________. The number of cells increases
while the total surface area of the embryo remains the same.
The blastula stage is usually comprised of about _____ cells and occurs roughly one week after
fertilization.
Cleavage Development
Radial vs. Spiral Cleavage
Most Deuterostomes: _________
e.g. Humans
Most Protostomes: ___________
e.g. Mollusks
Gastrulation
The process in which the invagination of the blastula creates the ________
 The opening of the newly formed cavity is called the ___________
 The germ layers, now present in the gastrula, develop into ____________
Zygote to Gastrula
Process of cell division:
___________ -> Eight-cell stage -> ___________ -> Blastula -> Gastrula
Animal Diversity
Animals are classified by four main attributes of their body plans:
1. ______________
2. Symmetry
3. ______________
4. Fate of __________
Tissues
Groups of cells that have a __________, specialized function
Parazoa
 Lack true tissues (No Endoderm, Mesoderm, or Ectoderm)
 Most are _____________
 Example: Phylum
Porifera (Sponges)
Eumetazoa
 Have _______ tissues (Have Endoderm,Mesoderm, and/or Ectoderm)
Symmetry
Imaginary planes create __________ images.
“Bilateria”
 Exhibits bilateral symmetry
 Triploblastic - 3 germ layers:
•
Endoderm
•
___________
•
Ectoderm
“Radiata”
 Exhibits radial symmetry
 Diploblastic - two germ layers:
•
___________
•
Ectoderm
Body Cavity
_________________ - lack a body cavity altogether
Platyhelminth (flatworm) is an example of this.
_________________ - body cavity partially derived from mesoderm
Nematode is an example of this.
__________________ - those with a true coelom derived completely from mesoderm
Crayfish is an example of this.
Mesoderm Development
- When a coelom is formed by introducing a gap surrounded by mesodermal cells at the base
of the _____________, between the ectoderm and the endoderm, it is said to exhibit
_____________ development.
- When a coelom is formed by “pinching off” a portion of the endoderm that develops into
mesoderm, it is said to exhibit _______________________ development.
Fate of the Blastopore
Protostome- __________ Develops from blastopore
Deuterostome- __________ Develops from blastopore