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
galina1969 [7]
3 years ago
14

A student wants to know what effect temperature will have on the germination rate of radish seeds.  To test this, she obtains 3

petri dishes and 60 radish seeds.  She places 20 seeds in the first petri dish and stores it at room temperature.  She places another 20 seeds in the second dish and places it in the freezer.  She places 20 seeds in the third petri dish and places the dish in an incubator.  Over the next two weeks, she waters the dishes daily and records the number of seeds germinate.  At the end of the experiment she calculates the germination rate for the seeds at each temperature. 
Hypothesis: ____________________________
Experimental Group: ____________________________
Control Group: ____________________________
Manipulated Variable (IV): ____________________________
Responding Variable (DV): ____________________________
Constants: ____________________________
Biology
1 answer:
kondaur [170]3 years ago
8 0

Answer:

Hypothesis: IF the temperature is high, THEN the germination rate of radish seeds will increase.

Experimental Group: 20 Seeds in petri-dishes placed in the freezer and incubator each

Control Group: 20 seeds stored at room temperature

Manipulated Variable (IV): TEMPERATURE

Responding Variable (DV): GERMINATION RATE

Constants: Amount of water, same amount of time (2 weeks)

Explanation:

- The hypothesis is a testable explanation given to an observed problem. A possible hypothesis is IF the temperature is high, THEN the germination rate of radish seeds will increase.

- Independent or manipulated variable is the variable that is changed or manipulated variable in an experiment. The TEMPERATURE is the independent variable in this case.

- Dependent or responding variable is the variable that is measured in an experiment. In this case, the dependent variable is the GERMINATION RATE

- The experimental group is the group that receives the experimental treatment. In this case, the experimental group is the 20 Seeds in petri-dishes placed in the freezer and incubator each.

- The control group is the group that does not receive the experimental group. In this case, the control group is the 20 seeds stored or placed at room temperature.

- Constants are the variables that are kept unchanged throughout the experiment. In this case, the constants are Amount of water, same amount of time (2 weeks)

You might be interested in
Making ATP without using oxygen is called
Lilit [14]
Anaerobic means with out oxygen
8 0
3 years ago
which type of cell division (mitosis v meiosis) increases the likelihood of variation with a species? explain how it happens?
kipiarov [429]
Meiosis Bc it is genetic variation and ends with 4 cells with a completely different genetic make up whole mitosis is the cell division of identical cells. It ends with two daughter cells.
5 0
3 years ago
Explain how water's cohesive and adhesive properties are a result of its bonding among the atoms
vladimir1956 [14]

Water is a unique molecule which contains inter-molecular forces like vandar wall's forces and hydrogen bonding that results in extremely strong bonding forces among water molecules.

Cohesion and adhesion are the properties of water which refer to the fact that water molecules are not only very strongly attracted to water molecules but also to other polar molecules of any type.

This is the cohesive nature of the water which makes water a water drop and it is the adhesive nature of water due to which water takes the shape and available space in a glass or jar of water .

How these properties are a result of bonding between atoms?

Cohesive properties:

  • We are well aware of the fact that water is composed of one atom of oxygen and two atoms of Hydrogen.
  • The two hydrogen atoms align themselves in such a way that oxygen is in middle of them. Due to great electronegativity difference Oxygen gets a partial negative charge while Hydrogen atoms get partial positive charges.
  • Now one oxygen atom of one one water molecule attracts the partial positive charged hydrogen atom of another water molecule, and this attraction causes the bonding. This type of inter-molecular forces of atom gives water cohesive properties.

Adhesive properties:

  • If we talk about adhesive properties through which water is attracted to other materials of polar nature, these adhesive properties are also due to same nature of bonding.
  • Any polar compounds can easily get bonded with water due to polar nature of water molecules. You can see the attached figure for better understanding of bonding properties of water.

Hope it help!


6 0
3 years ago
Which general tissue is responsible for transporting substances?
vampirchik [111]
Hello,

Here is your answer:

The proper answer to your question is option B "Vascular"! Vascular tissues are responsible for transporting water around the body!

Your answer is B.

If you need any ore help feel free to ask me!

Hope this helps!
4 0
3 years ago
Which organism evolved before the others in geologic time? mammals amphibians reptiles fish?
Murljashka [212]
Pretty sure it's fish
7 0
3 years ago
Other questions:
  • Which formed as a result of the compaction of dead plants?
    13·1 answer
  • Examples of the skills used in science include
    13·2 answers
  • Which of the following best represents the final products of the chemical reactions that take place inside the organelle labeled
    14·1 answer
  • Which of the following is not an accurate description of chemical reactions?
    13·2 answers
  • How is homeostasis like cleaning your room ?
    6·1 answer
  • Approximately how many moons does Saturn have
    5·2 answers
  • There are 2 genders change my mind
    11·2 answers
  • What did you include in your response? Medications can be tested on cell cultures instead of being injected into patients unnece
    10·1 answer
  • What is a non example of a community?
    12·1 answer
  • In your own words, what is the definition for Plasmalemma?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!