1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
artcher [175]
3 years ago
8

When studying animal behavior, the distribution of organisms within a choice chamber can be studied to identify animal preferenc

es. 20 Isopods are placed in a 2-choice choice chamber. A cotton ball dampened with distilled water is placed in Chamber A; A dry cotton ball is placed in Chamber B. After 15 minutes 2 Isopods are located in Chamber B, and 18 isopods are found in Chamber A. Perform the chi-squared test to determine if the distribution of isopods is significant or due to random chance.
a) chi-squared is 1.20, no it is not significant
b) chi-squared is 8.42, no its not significant
c) Chi-squared = 12.8, yes it is significant
d) Chi-squared is 18.59, yes it is significant
Biology
1 answer:
Komok [63]3 years ago
4 0

Answer:

c

Explanation:

Random distribution of the Isopods should be 50/50 in A and B.

Chi-square = \frac{(O - E)^2}{E} where O = observed frequency and E = expected frequency

Chamber         O                    E             Chi-square

  A                   18                   10             \frac{(18 - 10)^2}{10} = 6.4

  B                    2                    10             \frac{(2 - 10)^2}{10} = 6.4

<em>Total Chi-square </em>= 6.4 + 6.4 = 12.8

<em>Degree of freedom</em> = 2 - 1 = 1

<em>Tabulated Chi-square</em> (α = 0.05) = 3.8415

The calculated Chi-square exceeds the critical value, hence, it is significant and not due to random.

<em>The correct option is </em><em>c</em><em>.</em>

You might be interested in
Homeostasis involves the maintenance of constant conditions in an organism. What might happen to a protein if homeostasis is dis
meriva
This was answered else where on Brainly, and this is what they said,

"Most proteins in the living organisms are enzymes and they required specific optimum conditions in order to function optimally. Disruption in the homeostasis will leads to deactivation of these proteins. For instance, if the temperature needed for a protein to work optimally has been exceeded, the protein may be denatured and will be unable to perform its needed functions, this may result in several adverse effects in the organism."
7 0
3 years ago
Read 2 more answers
Why could the change in the tilt of Earth cause temperatures on<br> Earth to change?
Vesna [10]
The tilt of the earth changing would affect the distance to the sun. This, the radiation from the sun, and resulting temperatures, would change as well.
8 0
2 years ago
How often does necrotizing fasciitis evolve?<br><br><br> PLEASE HURRY!
Akimi4 [234]
Even with treatment, up to 1 in 3 people with necrotizing fasciitis die from the infection. Six out of every 10 people who get both necrotizing fasciitis and streptococcal toxic shock syndrome at the same time die from their infection
3 0
3 years ago
How does the structure of the papillary dermis relate to its functional properties?
Mandarinka [93]

Answer:

The papillary layer provides the layer above it, the epidermis, with nutrients to produce skin cells called keratinocytes. It also helps regulate the temperature of our skin and thus the body as a whole

4 0
3 years ago
A risk factor for osteoporosis is a. early menopause. b. ovarian cysts. c. late menopause. d. endometriosis.
Allisa [31]

Answer:

The correct answer is a. early menopause.

Explanation:

Estrogen is the hormone that helps in the protection of bones from being lost or degraded. This hormone is released in the ovary by follicle. The level of estrogen decreases sharply when a woman reached its menopause.

This decrease in estrogen levels in females can lead to osteoporosis in women. So early menopause increases the chances of bone loss in woman and bone loss increases the chances of fractures in women. One in two women who are above 50 in America breaks a bone due to osteoporosis. Therefore the correct answer is a. early menopause.

3 0
3 years ago
Other questions:
  • Which of the following is NOT a type of angiosperm? dicots tricots monocots none of the above
    8·2 answers
  • What relationships exists between an enzyme &amp; a catalysts?
    8·1 answer
  • In order to provide sufficient food for a group of indigenous people in the Amazon, a section of rainforest will be cut down to
    6·1 answer
  • Why are only shallow earthquakes abundant near the ocean ridges?
    5·1 answer
  • Why is it a advantage for the thylakoid cell to have a round shape?
    15·1 answer
  • What is it biotechnology?<br> What is it artificial selection? What it is clone?
    11·1 answer
  • What obtains energy nutrients from producers?
    9·1 answer
  • For which object would a geologist use carbon-14 dating to determine age?
    12·2 answers
  • Which fossil record would likely show more diversity in-living organisms of marine organisms?
    5·2 answers
  • What is an acid?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!