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alukav5142 [94]

3 years ago

8

Hypothesis: alfalfa plants grow best when given nitrogen-rich fertilizer. which statemend of purpose best defines the objective

of an experiment to test this hypothesis?

2 answers:

SIZIF [17.4K]3 years ago

3 0

To test the growth of alfalfa plants with and without nitrogen-rich fertilizer

sweet-ann [11.9K]3 years ago

3 0

Answer: To test the growth of alfalfa plants with and without nitrogen-rich fertilizer.

Explanation:

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Compare and contrast the five layers that make up the atmosphere.

Wittaler [7]

Exosphere is in the top 600-800km exosphere has a very low amount of gases almost like in outer space.

Termosphere, 80-600km absorbs gamma rays uv rays and rays that damage our healt also know as ionosphere, is the hottest one.

Mesosphere, 50-80km, the temperature here reaches -140 Celsius shooting stars are formed here

Stratosphere, 12-50km produces the mayor part of the atmospheric ozone, some army planes reach this later

Troposphere, thats the source of the mayor part of the gases here in the atmosphere.

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Whose ability to use fossils in stratigraphy was identified as a major breakthrough in

Alex777 [14]

William Smith and Georges Cuvier

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2 years ago

HELP ASAP WILL GIVE 10 POINTS PLEASEEE two populations of foxes are prevented from mating only because they live on two opposite

iragen [17]

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A geographic isolation

6 0

1 year ago

1. budowa globusu.

GenaCL600 [577]

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7 0

3 years ago

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

Komok [63]

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>

4 0

2 years ago