Biology 204
Midterm – October 2021
Exam Rules & Contract
NAME (PRINT LEGIBLY): __________________________________________________________________
Student Number: _______________________________________________________________________
Please print your name and student number on this exam cover page. Please read the following exam rules and sign your
name (signature) at the bottom of this page. By signing this cover page, you agree to abide by exam rules and regulations
set out by Biology 204 and the University of British Columbia. Institutional policies can be found in the UBC Okanagan
Academic Calendar.
Students who do not sign this cover sheet will not have their exam graded and included in their final grade for the course.
Students who fail to abide by the exam rules WILL have their exam confiscated; receive a zero grade for their exam and/or
may be subject to further disciplinary action. A plea of accident or forgetfulness shall not be considered.
I agree that:
I will NOT speak or communicate in any way with other students during this exam. If I have a question, I will raise my
hand and wait patiently until an invigilator comes to speak with me.
I will NOT expose my exam paper and answers to view of other students.
I will NOT use or share any prohibited materials during the examination.
Prohibited materials include, but are not limited to:
Books, papers, notes, textbooks, or any other outside material, other than your memory aid.
Electronic devices of any kind (exceptions for DRC-sanctioned devices), including, phones, tablets, computers,
smart watches, calculators, or any other device that can be connected to the internet.
Image-capturing/ recording devices of any kind.
I will NOT take any examination material from the exam room and I will return all exam components at the end of the
exam, including all pages of this booklet, and my memory aid.
I WILL do my best on this exam and try to answer all questions to the best of my abilities.
Signature: ______________________________________________________________________
This exam is printed double-sided. Total = 45
1
, 1. Comparing the blastocoel in frogs and chickens:
In frogs, the blastocoel is the space between the epiblast and the hypoblast, while in chick embryos, the
blastocoel is lined by endoderm, mesoderm, and ectoderm
In chick embryos, the blastocoel is found between the epiblast and hypoblast, while the blastocoel in frogs is
lined by germ layers
In chick embryos, the blastocoel is displaced by gastrulation, but in frog embryos the blastocoel remains as
an internal body cavity
In the frog embryo, the blastocoel is displaced by gastrulation, but in chick embryos the blastocoel becomes
the space between the extra-embryonic membranes
In frogs, the blastocoel is displaced as cells migrate through the primitive streak, whereas in chick embryos,
the blastocoel is displaced as cells migrate through the blastopore
2. All chordates possess the following characteristics at some stage in their development.
Notochord, Dorsal hollow nerve cord, Pelvic girdle, Pharyngeal slits
Notochord, Pharyngeal Slits, Post-anal tail, Ventral nerve cord, endostyle
Pharyngeal slits, Dorsal fin, Notochord, Paired sensory organs, endostyle
Dorsal hollow nerve cord, Pharyngeal slits, Notochord, Post-anal tail, endostyle
All of the above
3. Lepidosaurs (a major group of the Eureptilia) contain the following organisms.
Lizards, Snakes, Amphisbaenids
Crocodiles, Dinosaurs, Birds
Crocodiles, Lizards, Snakes
Amphisbaenids, Dinosaurs, Birds
All of the Above
4. The Class Aves exhibits the following characteristics.
Jaws, Anapsid skull, Feathers, Endothermy
Jaws, Diapsid skull, Ectothermy, Feathers
Jaws, Diapsid skull, Feathers, Endothermy
Jaws, Feathers, Anapsid skull, Ectothermy
None of the above
2
Midterm – October 2021
Exam Rules & Contract
NAME (PRINT LEGIBLY): __________________________________________________________________
Student Number: _______________________________________________________________________
Please print your name and student number on this exam cover page. Please read the following exam rules and sign your
name (signature) at the bottom of this page. By signing this cover page, you agree to abide by exam rules and regulations
set out by Biology 204 and the University of British Columbia. Institutional policies can be found in the UBC Okanagan
Academic Calendar.
Students who do not sign this cover sheet will not have their exam graded and included in their final grade for the course.
Students who fail to abide by the exam rules WILL have their exam confiscated; receive a zero grade for their exam and/or
may be subject to further disciplinary action. A plea of accident or forgetfulness shall not be considered.
I agree that:
I will NOT speak or communicate in any way with other students during this exam. If I have a question, I will raise my
hand and wait patiently until an invigilator comes to speak with me.
I will NOT expose my exam paper and answers to view of other students.
I will NOT use or share any prohibited materials during the examination.
Prohibited materials include, but are not limited to:
Books, papers, notes, textbooks, or any other outside material, other than your memory aid.
Electronic devices of any kind (exceptions for DRC-sanctioned devices), including, phones, tablets, computers,
smart watches, calculators, or any other device that can be connected to the internet.
Image-capturing/ recording devices of any kind.
I will NOT take any examination material from the exam room and I will return all exam components at the end of the
exam, including all pages of this booklet, and my memory aid.
I WILL do my best on this exam and try to answer all questions to the best of my abilities.
Signature: ______________________________________________________________________
This exam is printed double-sided. Total = 45
1
, 1. Comparing the blastocoel in frogs and chickens:
In frogs, the blastocoel is the space between the epiblast and the hypoblast, while in chick embryos, the
blastocoel is lined by endoderm, mesoderm, and ectoderm
In chick embryos, the blastocoel is found between the epiblast and hypoblast, while the blastocoel in frogs is
lined by germ layers
In chick embryos, the blastocoel is displaced by gastrulation, but in frog embryos the blastocoel remains as
an internal body cavity
In the frog embryo, the blastocoel is displaced by gastrulation, but in chick embryos the blastocoel becomes
the space between the extra-embryonic membranes
In frogs, the blastocoel is displaced as cells migrate through the primitive streak, whereas in chick embryos,
the blastocoel is displaced as cells migrate through the blastopore
2. All chordates possess the following characteristics at some stage in their development.
Notochord, Dorsal hollow nerve cord, Pelvic girdle, Pharyngeal slits
Notochord, Pharyngeal Slits, Post-anal tail, Ventral nerve cord, endostyle
Pharyngeal slits, Dorsal fin, Notochord, Paired sensory organs, endostyle
Dorsal hollow nerve cord, Pharyngeal slits, Notochord, Post-anal tail, endostyle
All of the above
3. Lepidosaurs (a major group of the Eureptilia) contain the following organisms.
Lizards, Snakes, Amphisbaenids
Crocodiles, Dinosaurs, Birds
Crocodiles, Lizards, Snakes
Amphisbaenids, Dinosaurs, Birds
All of the Above
4. The Class Aves exhibits the following characteristics.
Jaws, Anapsid skull, Feathers, Endothermy
Jaws, Diapsid skull, Ectothermy, Feathers
Jaws, Diapsid skull, Feathers, Endothermy
Jaws, Feathers, Anapsid skull, Ectothermy
None of the above
2
