Free

Natural Selection - Lab Report Example

Comments (0) Cite this document
Summary
The theory of selection is attributed to Charles Darwin evolution theory. In His theory, Charles Darwin defines selection as the…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER98.1% of users find it useful
Natural Selection
Read TextPreview

Extract of sample "Natural Selection"

Biology 1108: Natural Selection Lab Homework Assignment Introduction The definition of natural selection is; differential reproduction and survival of living things due to their existing physical conditions/attributes. The theory of selection is attributed to Charles Darwin evolution theory. In His theory, Charles Darwin defines selection as the process of the functional relationship that exists between phenotypes and fitness. The fitness in this context is defined by three different kinds of curve which include; directional selection whereby the traits of a given organism are related to fitness linearly, stabilizing whereby the trait of interest has an optimum value, and finally, Disruptive curve in which organisms that have the largest and the smallest values of any given trait boots of highest fitness value and conversely, organism that have intermediate values are disadvantaged.
Considering the above stated facts, it is seen that in the long term, Directional selection results to generation of the new type of species from the existing species. This is unlike stabilizing in which the given specie maintains its existing type without any variation over the long period of time. It has been found that stabilizing selection results in the refinement of the existing specie type. On the other hand, disruptive selection facilitates favouritisms of given individuals of a given phenotype (Williams).
Results
This experiment’s main objective is the comparison on how the population size varies in different generations depending on different environmental conditions, determination of the effect of different predator types on the population of prey, and the gaining of graphing and interpretation knowledge.
Hypothesis
1. If the environmental conditions favour a given specie, the population size of the said specie increases in the next generation as compared to the preceding population size, and vice versa.
2. Increase in the number of predators on given specie results in the decrease in the population size of the prey
Results
PREDATOR POPULATION HABITAT 1
Group data
Generation 1
# prey captured



Total #
Predator type
Group 1
Group 2
Group 3
Group 4
Group 5

Knives
2
0
1
0
0
3
Forks
4
8
7
3
3
25
Spoons
5
5
8
3
12
33
Clothespin
7
6
8
11
8
40
Generation 2
# prey captured




Total #
Predator type
Group 1
Group 2
Group 3
Group 4
Group 5

Knives
0
0
0
0
0
0
Forks
1
6
4
8
2
21
Spoons
4
4
8
4
9
29
Clothespin
11
13
17
22
18
81
Generation 3
# prey captured




Total #
Predator type
Group 1
Group 2
Group 3
Group 4
Group 5

Knives
0
0
0
0
0
0
Forks
0
0
0
0
0
0
Spoons
5
4
13
10
13
45
Clothespin
24
16
34
33
19
126



PREY POPULATION HABITAT 1
Group data
Generation 1 # Eaten
Group 1
Group 2
Group 3
Group 4
Group 5
Total Eaten
Prey Type

Pinto
5
1
3
2
4
15
Garbanzo
3
4
7
9
12
35
White
5
8
8
6
4
31
S.pea
5
6
6
0
3
20
Generation 2 # Eaten
Group 1
Group 2
Group 3
Group 4
Group 5
Total Eaten
Prey Type

Pinto
2
2
2
10
2
18
Garbanzo
10
10
17
17
16
70
White
4
6
8
6
8
32
S.pea
0
5
2
1
3
11
Generation 3 # Eaten
Group 1
Group 2
Group 3
Group 4
Group 5
Total Eaten
Prey Type

Pinto
6
6
20
18
8
58
Garbanzo
9
11
7
11
9
47
White
14
2
20
15
9
60
S.pea
0
1
1
0
6
8
PREY POPULATION HABITAT 2
Group data
Generation 1 # Eaten
Group 1
Group 2
Group 3
Group 4
Group 5
Total Eaten
Prey Type

Pinto
9
10
8
6
8
41
Garbanzo
9
11
11
10
8
49
White
12
11
10
12
13
58
S.pea
4
4
0
0
3
11
Generation 2 # Eaten
Group 1
Group 2
Group 3
Group 4
Group 5
Total Eaten
Prey Type

Pinto
15
10
17
12
13
67
Garbanzo
6
8
10
13
13
50
White
16
13
14
14
14
71
S.pea
5
6
6
6
9
32
Generation 3 # Eaten
Group 1
Group 2
Group 3
Group 4
Group 5
Total Eaten
Prey Type

Pinto
18
15
19
12
18
82
Garbanzo
14
14
18
18
19
83
White
8
7
9
8
10
42
S.pea
9
4
3
7
4
27
PREDATOR POPULATION HABITAT 2
Group data
Generation 1
# prey captured



Total #
Predator type
Group 1
Group 2
Group 3
Group 4
Group 5

Knives
5
6
4
3
4
22
Forks
9
10
7
7
10
43
Spoons
10
10
9
8
12
49
Clothespin
10
10
9
10
6
45
Generation 2
# prey captured




Total #
Predator type
Group 1
Group 2
Group 3
Group 4
Group 5

Knives
0
0
0
0
0
0
Forks
9
8
8
10
9
44
Spoons
25
21
27
24
33
130
Clothespin
8
8
12
11
7
46
Generation 3
# prey captured




Total #
Predator type
Group 1
Group 2
Group 3
Group 4
Group 5

Knives
0
0
0
0
0
0
Forks
10
10
10
10
7
47
Spoons
27
22
27
24
35
135
Clothespin
12
8
12
10
9
51



Figure 1
A scatter plot of predator versus generation for habitat 1.
In this habitat, the number of Clothespin is increasing linearly while knives and spoons are decreasing as the generation changes. However, number of spoons decreases from first generation to second generation, then it starts increasing.
Figure 2: A scatter plot of prey versus generation for habitat 1.
In this habitat, the number of S. pea preys decreases tremendously in all the generation. The number of White and pinto decreases from first generation to second generation and starts increasing from generation 2 to generation 3
Figure 3: A scatter plot of predator versus generation for habitat 2.
The number of Forks and clothespin in this habitat is almost constant. The change in the number of spoons increases tremendously from generation 1 to generation 2 and decreases from generation 2 to generation 3
Figure 2: A scatter plot of prey versus generation for habitat 1.
In this habitat, all the preys increases from generation 1 to generation 2. Also, the trend is the same in generation 2 to generation 3 save White only.
Conclusions
As the Number of predators increases, the number of preys decreases. This is due to the fact that an increase in the number of predators results into more preys being eaten and as a result, their (prey) number decreases. Also, as the number of predators decreases, the number of preys increases. This is attributed to the fact that the decrease in the number of predators’ results into less preys being killed thus their increase in number.
References
Williams, George. Adaptation and Natural Selection. West Sussex: Princeton University press, 1992. print. Read More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Natural Selection Lab Report Example | Topics and Well Written Essays - 500 words”, n.d.)
Natural Selection Lab Report Example | Topics and Well Written Essays - 500 words. Retrieved from https://studentshare.org/biology/1628817-natural-selection
(Natural Selection Lab Report Example | Topics and Well Written Essays - 500 Words)
Natural Selection Lab Report Example | Topics and Well Written Essays - 500 Words. https://studentshare.org/biology/1628817-natural-selection.
“Natural Selection Lab Report Example | Topics and Well Written Essays - 500 Words”, n.d. https://studentshare.org/biology/1628817-natural-selection.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document

CHECK THESE SAMPLES OF Natural Selection

Which Way, Natural Selection or Intelligent Design

...Which Way, Natural Selection or Intelligent Design The intelligent design argument refers to the negative approach to the natural forces at work as well as to the natural selection as an essential factor in bringing different forms of life that are observed by humans. This argument postulates that an intelligent designer was the force behind everything that is observed today. Indeed, this argument further postulates that the appearance of organisms has no significant contribution to the survival success of the ancestors which is experienced in the natural selection. Indeed, the intelligent design was significant in...
5 Pages(1250 words)Essay

Darwin Natural Selection

..., and to what end such a life should serve. Although rather well defended, this particular theory is replete with flaws, non-sequiturs, and a litany of other logical failings. As a means of shedding a level of inference with regards to this particular topic, the following analysis will seek to discuss the moral of the nations of Darwin’s fear he of natural selection. One of the issues that creationists and individuals that believe in intelligent design point to as a shortcoming of natural selection is with respect to those organisms or systems that are highly complex and in which partial inadequacy of function would preclude natural...
4 Pages(1000 words)Essay

Natural Selection

...Running head: Natural Selection s 17 April 2009 Natural Selection Natural selection is very closely related withevolution, natural selection involves heritable traits with the help of which organisms survive long enough and reproduce and this is exactly how their population remains stable. Natural variation also plays a pivotal role in natural selection; natural selection is the chance of survival among organism. Natural selection is a very important process with the help of which a key...
3 Pages(750 words)Essay

Evolution and Natural Selection

...of Speciation, Global Change Program, University of Michigan) This paper will focus on the theory of evolution put forth by Charles Darwin. Key aspects of evolution like the process of Natural Selection and Variation will be discussed. Also, with reference to reference to 'Darwin's finches', the paper will describe how geographical isolation has caused new species to evolve from a common ancestor Darwin was influenced by observations made during his voyage as naturalist on the survey ship Beagle. After studying several plant and animal species, Charles Darwin published some of his key observations and ideas in his book, "The Origin of Species." His theory of evolution comprises 4 parts: 1. As fossils...
5 Pages(1250 words)Essay

Natural Selection

... Biology Topic: Natural Selection--describe how and why natural selection is an important concept in Evolutionary Biology The effect of natural selection is at the level of the individual. Natural selection plays the important role in shaping the individual genotype. George Christopher Williams in his book “Adaptation and Natural Selection” writes, “The contest was decisively won by natural selection, in my opinion, when by 1932 the classic works of Fisher, Haldane, and Wright had been published.” (3) Acceptable evidence is not forthcoming in support of other systems of evolutionary change or any other genetic system of adaptations. Thus natural selection in shaping life... and...
1 Pages(250 words)Essay

Natural Selection

...Natural selection Why is the slogan "survival of the fittest" a poor of what really goes on in nature?It is a poor description of what happen in nature because in order to survive, organisms with poor adaptations can change slowly over time to become adapted to the environment. The events of natural selection and speciation are the main causes of evolution which means an organism develop new traits to survive in harsh climatic conditions. 2. How might natural selection produce the appearance of design in nature and how does that relate to the patterns that Niles Eldredge discussed in...
1 Pages(250 words)Essay

Natural Selection Concept Redesign

... Natural Selection Concept Redesign Natural selection is one of the topics that are regarded complex in biology. Many misconceptions lie behind it making it more difficult to teach or understand easily. There is therefore need for a biology concept redesign in teaching the topic to undergraduate students to enable better understanding and consequently enthuse to learn the topic deeper (Roselli, 2011). According to Pugesek (2003), the concept of hands-on or minds-on should be incorporated in teaching of natural selection. The concept works through actively engaging the students in activities that are intimately associated to better the...
3 Pages(750 words)Research Paper

Evolution and Natural Selection Lab

...Evolution and Natural Selection Lab Evolution Lab Your affiliation Q1. The “tree of life” is a phylogenetic illustration of the origin of the various species of animals from an ancient single organism dating from millions of years. It shows the location of every animal in advancement relative to other organisms and relative to the original ancestral organisms (Evolution and Natural Selection, 2010). Q2. Geologists had no idea of how old the earth was but the emergence of the study of rocks especially sedimentation rocks started giving light to the possibility that the earth was older than the Bible claimed. Geologists postulated that the current happenings were a...
1 Pages(250 words)Coursework

NATURAL SELECTION AND ECOLOGY

...parts. Organisms within the ecosystem have been affected by the oil spill in the sea. The spill has created unfavorable environment that has rendered survival of various organisms difficult. Level of threats Notably, the spill of oil in the Mexican sea poses immense level of threat to the plants and animals that cohabits within the marine wetland and other ecosystems. The level of threat is evident since the oil has been affecting the growth of natural resources such as tress, grass and others that acts as homes to certain animals, death of the plants, and contamination of the environment (Pallardy, 2014). The oil has been contaminating water that provides primary productivity incentives relied upon by the many species...
4 Pages(1000 words)Research Paper

Natural selection

...Natural Selection Natural Selection By definition, genetic variations constantly occur within populations. This makes some members of the populations to be better suited to the prevailing environmental conditions. As a result, such better suited populations adapt faster to the environment, while the members with lower adaptability are selected against through the process of natural selection. In Drosophila pseudoobscura, heterozygosity and homozygosity is a common occurrence on the third chromosome. In natural settings, variations in the constitutions of the genetic makeup of the organisms vary from one...
2 Pages(500 words)Assignment
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Lab Report on topic Natural Selection for FREE!

Contact Us