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SCIN130 B001 Lab 5, 6, 7, 8.
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Reply# 14
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SCIN130 B001 Lab 5, 6, 7, 8.
3 years ago
I need help with this too  Thinking


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Reply# 15
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SCIN130 B001 Lab 5, 6, 7, 8.
3 years ago
Here's what I came up with... So I'm not 100% sure of all my answers. Hopefully there all correct tho. 

Table 1:
*Results will vary depending on the samples chosen by the computer.

Day   P. caudatum alone, cells/mL(from tt#1)   P. aurelia alone, cells/mL(from tt#2)   P. caudatum mixed, cells/mL(from tt#3)   P. aurelia mixed, cells/mL(from tt#3)
0   2   2   2   2
2   8   10   10   6
4   30   54   24   36
6   52   84   18   64
8   60   96   14   78
10   60   96   8   88
12   56   100   6   94
14   60   94   0   96
16   60   92   0   94


Lab Questions:

1.   Make a hypothesis about how you think the two species of paramecia will grow alone and how they will grow when they are grown together.
My hypothesis is that the species alone will grow rapidly at first. Eventually declining as space and food becomes limited. Together I believe one will outgrow the other; the one with a more rapid growth rate.

2.   Explain how you tested your hypothesis.
I ran a lab on the two species of paramecia. Every other day testing samples of each two species and both species together. Ultimately coming to a positive conclusion of my hypothesis.

3.   On what day did the Paramecium caudatum population reach the carrying capacity of the environment when it was grown alone? How do you know?
Day 10. Because at day 8 and 10 the number were the same and after day 10 it started to decline.

4.   On what day did the Paramecium aurelia population reach the carrying capacity of the environment? How do you know?
Day 12. Because it began to decline after day 12.

5.   Explain the differences in the population growth patterns of the two paramecium species. What does this tell you about how Paramecium aurelia uses available resources?
The Paramecium caudatum grew at a much slower rate than the Paramecium Aurelia. Caudatum never reached the same numbers as Aurelia. Paramecium Aurelia uses its available resources until it reaches the carrying capacity.

6.   Describe what happened when the paramecium populations were mixed in the same test tube. Do the results support the principle of competitive exclusion?
The paramecium Aurelia eventually took over and over grew the caudatum (intraspecific competition). The results do support the principle of competitive conclusion.

7.   Explain how this experiment demonstrates that no two species can occupy the same niche.
It’s the principle of competitive exclusion. This principle states that if two species are competing for the same resource, the species with a more rapid growth rate will out compete the other. In other words, no two species can occupy the same niche.

8.   Paramecia possess:
a.    Flagella
b.   A contractile vacuole
c.   All of the above
   **C
9.    The organisms used in this experiment belong to which domain of life?
a.    Bacteria
b.   Archaea
c.   Eukarya
   **C
10.   What served as the food for the paramecia in this experiment?
a.    Rice
b.   Oats
c.   Bacteria
d.   Nothing, they are photosynthetic
        **A
11.   Which of the following can influence the carrying capacity of a population?
a.   Availability of food
b.   Availability of water
c.   Competition
d.   Build up of toxins
e.   All of the above
   **E
12.   Which type of competition would be observed between organisms within the P. caudatum culture?
a.    Interspecific
b.   Intraspecific
c.   There would be no competition, they are of the same species
   **B
13.     Which culture reached its carrying capacity the fastest in this experiment?
a.    P. caudatum, alone
b.   P. aurelia, alone
c.   P. aurelia, mixed
        **B
14.   You have counted 30 organisms in your culture on Day 4.  The concentration of organisms in this culture is:
a.    15 cells/mL
b.   30 cells/mL
c.   60 cells/mL
d.   90 cells/mL
   **C
15.    Based upon your data, which culture experienced the greatest rate of exponential growth?
a.    P. caudatum, alone
b.   P. aurelia, alone
c.   P. caudatum, mixed
d.   P. aurelia, mixed
   **B
16.    Based upon the data, which organism appeared more efficient at using its resources?
a.     P. caudatum
b.    P. aurelia
   **B
17.   In a repeat of this experiment, you found that on Days 10-16 the number of individuals in the P. caudatum, mixed culture began to gradually rise.  A possible explanation for this is:
a.    There was insufficient food in the culture
b.   The temperature warmed enough to allow for more growth
c.   A genetic variant of the original population began to experience growth due to its use of a different food (bacterium) source
d.   None of the above could lead to this scenario
   **C



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Reply# 16
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SCIN130 B001 Lab 5, 6, 7, 8.
3 years ago
They look correct though ...


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Reply# 17
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SCIN130 B001 Lab 5, 6, 7, 8.
3 years ago
They look correct though ...

Thanx Howard. I hope your right; at any rate I feel more confident now tho. If any are wrong I'll try to post that after it's graded.


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Reply# 18
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SCIN130 B001 Lab 5, 6, 7, 8.
3 years ago
They look correct though ...

Thanx Howard. I hope your right; at any rate I feel more confident now tho. If any are wrong I'll try to post that after it's graded.

Tongue I hope so, yah let me know.


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Reply# 19
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SCIN130 B001 Lab 5, 6, 7, 8.
3 years ago
please can someone has the answer for lab 6


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Reply# 20
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SCIN130 B001 Lab 5, 6, 7, 8.
3 years ago
They look correct though ...

Thanx Howard. I hope your right; at any rate I feel more confident now tho. If any are wrong I'll try to post that after it's graded.

Tongue I hope so, yah let me know.

I missed one..

Question 8 is B


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Reply# 21
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SCIN130 B001 Lab 5, 6, 7, 8.
3 years ago
Yeah, I thought they were covered with cilia.


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Reply# 22
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SCIN130 B001 Lab 5, 6, 7, 8.
3 years ago
I have the lab 6 answer


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Reply# 23
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SCIN130 B001 Lab 5, 6, 7, 8.
3 years ago
I have the lab 6 answer
Are you gonna post it?


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SCIN130 B001 Lab 5, 6, 7, 8.
3 years ago
7.   Answer Lab Questions 1-14 below.

Table 1:  Threshold Stimulus (V)   (30pts)

Load   Lower Forelimb Muscle   Upper Forelimb Muscle   Calf Muscle   Thigh Muscle
0g            
5g            
10g            
20g            
40g            
80g            

Lab Questions:

1.   Smooth muscle (5):
a.    Is voluntary
b.   Is found in the heart
c.   Is found in lining the intestines
d.   All of the above

2.   Skeletal muscle (5):
a.    Is involuntary
b.   Is made up of muscle fibers
c.   Is attached to bone via ligaments
d.   All of the above

3.   In skeletal muscle (5):
a.    The greater the number of muscle fibers responding to a stimulus, the greater the strength of the contraction
b.   the fewer the number of muscle fibers responding to a stimulus, the greater the strength of the contraction
c.   the actual number of muscle fibers responding to a stimulus has no effect on the strength of the contraction

4.   An oscilloscope (5):
a.    Provides stimulus to a tested muscle
b.   Adds weight (load) to a tested muscle
c.   Measures a twitch response of a tested muscle
d.   A and C
e.   All of the above

5.   At the point of muscle overload (5):
a.    Skeletal muscle contracts steadily (tetany)
b.   Skeletal muscle contracts and relaxes repeatedly
c.   Skeletal muscle does not contract at all
 
6.   A skeletal muscle’s “threshold of stimulation” (5):
a.    Is determined by the lowest voltage stimulus needed to elicit a muscle twitch
b.   Varies with muscle type
c.   Is not altered by the application of muscle load
d.   B and C

7.   In response to a stimulus, skeletal muscle fibers (5):
a.    Always contract to 25% of their potential ability
b.   Always contract to 50% of their potential ability
c.   Always contract 100% of their potential ability
d.   None of the above

8.   Based upon your experimental data, which muscle type exhibited the lowest threshold of stimulation in all conditions tested? (5)
a.    Lower forelimb muscle
b.   Upper forelimb muscle
c.   Calf muscle
d.   Thigh muscle

9.   Based upon your experimental data, which muscle type(s) did not reach the point of muscle overload? (5)
a.     Lower forelimb muscle
b.   Upper forelimb muscle
c.   Calf muscle
d.   Thigh muscle

10.   Based upon your experimental data, which muscle tested appears most capable to provide the contraction strength needed for a frog to jump? (5)
a.    Lower forelimb muscle
b.   Upper forelimb muscle
c.   Calf muscle
d.   Thigh muscle



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Reply# 25
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SCIN130 B001 Lab 5, 6, 7, 8.
3 years ago
does anyone has the answer  for this lab


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Reply# 26
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SCIN130 B001 Lab 5, 6, 7, 8.
3 years ago
I will have the answer for lab 6 this week


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Reply# 27
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SCIN130 B001 Lab 5, 6, 7, 8.
3 years ago
I will have the answer for lab 6 this week

post, post, post Happy


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