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What information about the Devonian tetrapods leads to the conclusion that tetrapods evolved in the water rather than on land?
Write a half page short story about the following:
You are a very important cell in the human body and have recently been put in charge of the "fight or flight" response. It is your responsibility to coordinate all activities if a threat appears, so you diligently prepare. One day, your human is confronted with a natural disaster. A tornado is fast approaching his home and there is little time. He wants to save his pets and some belongings, but also wants to run as far away from danger as possible. Write a story about how you coordinate all of the systems in the body to ensure your human has the best chance of survival. Remember to include details about the fight or flight response you learned in the video. Bonus points for creativity is possible!
You are a very important cell in the human body and have recently been put in charge of the "fight or flight" response. It is your responsibility to coordinate all activities if a threat appears, so you diligently prepare. One day, your human is confronted with a natural disaster. A tornado is fast approaching his home and there is little time. He wants to save his pets and some belongings, but also wants to run as far away from danger as possible. Write a story about how you coordinate all of the systems in the body to ensure your human has the best chance of survival. Remember to include details about the fight or flight response you learned in the video. Bonus points for creativity is possible!
If you are assuming that there is the accumulation one mutation in every 10 DNA bases every 100,000 years, how long would you predict it has been since the divergence of E. coli and Anabaena?
A 10 g (dry weight) mouse is accidentally drowned in a 25 L bottle of non-sterile
spring water that initially contains 10 mg/L oxygen. Assume that 70% of the
mouse’s dry weight is CH2O.
a. Write the relevant reaction for respiration of the mouse with oxygen.
b. Does the jug become anaerobic?
c. If 2 ppm NO3- and 15 ppm SO42- are in the spring water, how much of each
will be left when the jug reaches equilibrium? Write relevant reactions.
d. How much of the mouse will be left, assuming no organism capable of
fermentation are present?
spring water that initially contains 10 mg/L oxygen. Assume that 70% of the
mouse’s dry weight is CH2O.
a. Write the relevant reaction for respiration of the mouse with oxygen.
b. Does the jug become anaerobic?
c. If 2 ppm NO3- and 15 ppm SO42- are in the spring water, how much of each
will be left when the jug reaches equilibrium? Write relevant reactions.
d. How much of the mouse will be left, assuming no organism capable of
fermentation are present?
Below is a recipe of a medium attempted to isolate aerobic heterotrophic bacteria
from some environmental samples. Based on this recipe, do you think this
experiment will work? Explain your rationale. Also, which chemical is used as
an energy source in this case?
m.w. weight/volume
K2HPO4 174 7.0 g
KH2PO4 136 2.0 g
NH4Cl 53.5 1.0 g
MgCO3 84 0.1 g
CaCl2 111 0.05 g
Sodium Acetate 82 1.5 g
Trace elements in chloride forms (Fe, Co, Mn, Zn, Cu, Ni, Mo) 10 μg
Distilled water (pH 7) 1000 mL
from some environmental samples. Based on this recipe, do you think this
experiment will work? Explain your rationale. Also, which chemical is used as
an energy source in this case?
m.w. weight/volume
K2HPO4 174 7.0 g
KH2PO4 136 2.0 g
NH4Cl 53.5 1.0 g
MgCO3 84 0.1 g
CaCl2 111 0.05 g
Sodium Acetate 82 1.5 g
Trace elements in chloride forms (Fe, Co, Mn, Zn, Cu, Ni, Mo) 10 μg
Distilled water (pH 7) 1000 mL
Biology
Human Biology how can human breeding?
does the size of a cell impact its overall efficiency?
Create and describe a unique model for the structure and function
of the cell
of the cell
What is crossing over in meiosis and what is the purpose of it?
Describe the structure of communication junction in multicellular plants .
