©THESTAR 2024/2025 ALL RIGHTS RESERVED 1:27PM. A+
Bio 1500 Final Exam Questions And Answers
|Latest 2025 | Guaranteed Pass
Dragonflies - Answer✔Formidable aerial and aquatic predators
Identify dragonflies as ancient insects (when, what, why) - Answer✔Carboniferous period (360 -
300 mya)
Identify huge body size as the outstanding characteristic of animals (including dragonflies)
during the carboniferous period - Answer✔...
Dates of major milestones in the history of life on earth, as indicated in the online learning
module - Answer✔Earth formed - 4.6 bya
Oldest rocks - 3.8 bya
Oldest fossils (= signs of life) - 3.5 bya
Cyanobacteria - 2500 mya
Algea - 1200 mya
Cambrian Explosion - 545 mya
First dinosaurs - 230 mya
First birds - 150 mya
Dinosaur extinction - 65 mya
Modern humans - 200,000 ya
Identify interesting and 'unusual' events in the history of earth - Answer✔"Snowball" - ice ages:
the whole earth froze and created a giant ice ball, which was caused by the Pangea, meaning
instead of there being seven continents, there was only one supercontinent.
Cambrian explosion: The animals alive during this period are what interested me the most, they
almost look like crustaceans, but they are a million times bigger, which astonished me. One of
the animals described had five eyes!
1|Page
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 1:27PM. A+
Recall environmental characteristics of the Carboniferous period - Answer✔At the beginning of
the carboniferous period, it is assumable that once again we have a giant continent with only
small break offs, and just complete water at the two poles. The continent begins to expand to
the poles, but one side of the earth still has no land and strictly just water. Oxygen during this
tie was at a pearl or beginning to peak ,eating that this was a time where oxygen on the earth
was higher than the eras before.
Relate changes of O2 levels in the atmosphere to biological events in the history of life -
Answer✔Oxygen concentration is a key physiological control on body size, especially in groups
like flying insects that have high metabolic oxygen demands. So, the more oxygen in the air, the
more consumption of oxygen by the dragonflies, increasing their organs, and overall their size.
Recognize that all O2 on earth stems from biological processes - Answer✔O2 was created by
cyanobacteria, which are green bacteria that harvest energy from the sun and create sugars,
while O2 was the byproduct. (Photosynthesis)
Recognize the geology of earth has been dramatically changed by biology - Answer✔60% of
earth's minerals are biogenic, which means the earth's minerals use oxygen produced by life;
they were generated through life.
Describe the mechanism of diffusion at the level of single particles - Answer✔From high
concentration to low concentration
Describe the pattern observed due to diffusion at the level of many particles - Answer✔...
Explain how the behavior of single particles explains the observed pattern at the many particles
level - Answer✔Each particle moves on its own, going from a naturally high concentration to a
low one, but this occurs by random particle movements. The particles naturally go to a lower
concentration, but this happens only by the particles colliding with other moving particles. This
then leads us to be able to predict, generally, where the molecules are going, because as we
stated, we cannot predict the exact movement of each individual particle.
Diffusion - Answer✔• Movement of molecules from an area of high concentration to an area of
low concentration
• Driven by Brownian (thermal) movements of molecules
Particles move randomly on both sides
• There are more particles at the side of high concentration
• Thus, it is more likely one will move from high to low concentration
• This continues until there is an even number on both sides
• Random motion of individual particles result in the net flow of particles from high to low
concentration
Each molecule: - Answer✔Moves randomly (not directed to low concentration)
2|Page
Bio 1500 Final Exam Questions And Answers
|Latest 2025 | Guaranteed Pass
Dragonflies - Answer✔Formidable aerial and aquatic predators
Identify dragonflies as ancient insects (when, what, why) - Answer✔Carboniferous period (360 -
300 mya)
Identify huge body size as the outstanding characteristic of animals (including dragonflies)
during the carboniferous period - Answer✔...
Dates of major milestones in the history of life on earth, as indicated in the online learning
module - Answer✔Earth formed - 4.6 bya
Oldest rocks - 3.8 bya
Oldest fossils (= signs of life) - 3.5 bya
Cyanobacteria - 2500 mya
Algea - 1200 mya
Cambrian Explosion - 545 mya
First dinosaurs - 230 mya
First birds - 150 mya
Dinosaur extinction - 65 mya
Modern humans - 200,000 ya
Identify interesting and 'unusual' events in the history of earth - Answer✔"Snowball" - ice ages:
the whole earth froze and created a giant ice ball, which was caused by the Pangea, meaning
instead of there being seven continents, there was only one supercontinent.
Cambrian explosion: The animals alive during this period are what interested me the most, they
almost look like crustaceans, but they are a million times bigger, which astonished me. One of
the animals described had five eyes!
1|Page
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 1:27PM. A+
Recall environmental characteristics of the Carboniferous period - Answer✔At the beginning of
the carboniferous period, it is assumable that once again we have a giant continent with only
small break offs, and just complete water at the two poles. The continent begins to expand to
the poles, but one side of the earth still has no land and strictly just water. Oxygen during this
tie was at a pearl or beginning to peak ,eating that this was a time where oxygen on the earth
was higher than the eras before.
Relate changes of O2 levels in the atmosphere to biological events in the history of life -
Answer✔Oxygen concentration is a key physiological control on body size, especially in groups
like flying insects that have high metabolic oxygen demands. So, the more oxygen in the air, the
more consumption of oxygen by the dragonflies, increasing their organs, and overall their size.
Recognize that all O2 on earth stems from biological processes - Answer✔O2 was created by
cyanobacteria, which are green bacteria that harvest energy from the sun and create sugars,
while O2 was the byproduct. (Photosynthesis)
Recognize the geology of earth has been dramatically changed by biology - Answer✔60% of
earth's minerals are biogenic, which means the earth's minerals use oxygen produced by life;
they were generated through life.
Describe the mechanism of diffusion at the level of single particles - Answer✔From high
concentration to low concentration
Describe the pattern observed due to diffusion at the level of many particles - Answer✔...
Explain how the behavior of single particles explains the observed pattern at the many particles
level - Answer✔Each particle moves on its own, going from a naturally high concentration to a
low one, but this occurs by random particle movements. The particles naturally go to a lower
concentration, but this happens only by the particles colliding with other moving particles. This
then leads us to be able to predict, generally, where the molecules are going, because as we
stated, we cannot predict the exact movement of each individual particle.
Diffusion - Answer✔• Movement of molecules from an area of high concentration to an area of
low concentration
• Driven by Brownian (thermal) movements of molecules
Particles move randomly on both sides
• There are more particles at the side of high concentration
• Thus, it is more likely one will move from high to low concentration
• This continues until there is an even number on both sides
• Random motion of individual particles result in the net flow of particles from high to low
concentration
Each molecule: - Answer✔Moves randomly (not directed to low concentration)
2|Page
