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Leni [432]
2 years ago
10

You are given this hypothesis: “if beans are grown in soil with compost, then they will grow at the same rate as beans grown in

soil without compost because compost has no effect on the growth rate of beans.” You have access to these supplies and equipment: fifty bean seeds, fifty small pots, potting soil, compost, and grow lights. Write a brief scientific design to test this hypothesis. Include the aspects of good scientific design described in this lesson.Enter your scientific design in the space below.
Biology
2 answers:
ioda2 years ago
8 0
You put 1 bean seed in each small pot, fill 25 of the pots with only potting soil, and the remainder with 1/2 potting soil and 1/2 compost. Then you put all of them under an equal amount of grow lights. Put them under at the same time, and take notes every day to see if they grow at the same rate or not. If they do, then it proves this hypothesis is correct. If they don't then the hypothesis is wrong

hope this helps
hjlf2 years ago
8 0

Divide plants into two groups of twenty-five. Plant twenty-five seeds in pots with potting soil without compost; this is the control group. Plant the other twenty-five in pots with potting soil and a specific amount of compost added; this is the experimental group. Place the pots under grow lights. After germination, measure the height of the plants at set intervals (e.g., every two days) for a set amount of time (e.g., two weeks). The IV is the presence or absence of compost. The DV is the height of plants. Twenty-five plants per group is a good sample size; all obvious variables are controlled. The experiment is simple and specifically described, so it can be replicated. The seeds were assigned randomly; there is no obvious bias in the experiment.

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You are a wildlife biologist. You think the best way to protect the selkirk caribou is to use the same technique that saved the
larisa86 [58]

Answer:

Controlling the predator population, wolves.

Explanation:

The method followed for the little smoky herd protection was to control their habitat and the population of the predators in the said habitat, which were wolves.

If I recommend the same method as the best way to protect the selkirk caribou, then i would be suggesting controlling the population of the predators in the area, which are mostly wolves, and in this way protecting the population of the selkirk caribou.

I hope this answer helps.

8 0
3 years ago
True or false? adding heat or taking it away can change matter from one state to another.
Molodets [167]

Answer:

True..

Explanation:

3 0
2 years ago
Read 2 more answers
Which nucleic acid is pictured on the right? Justify your answer.
alukav5142 [94]

Answer:

Nucleic Acids:

- Uracil

- Adenine

- Guanine

- Cytosine

Explanation:

Since we only have one strand shown, I'm going to assume it is RNA. Both DNA and RNA have nucleic acids, but RNA has 1 different nucleic acid; it replaces Thymine with Uracil. So the 4 nucleic acids are uracil, adenine, guanine, and cytosine.

If the picture shown is a cross-section of DNA, then our 4 nucleic acids are adenine, thymine, guanine, and cytosine.

6 0
3 years ago
Read 2 more answers
Two heterozygous red flowers (white flowers are recessive) are crossed
e-lub [12.9K]
It would be: Rr × Rr
Result of cross would be: 1RR, 2Rr, 1rr

So, it's genotypic ratio = 1:2:1
Phenotypic ratio = 3:1

Hope this helps!
4 0
3 years ago
Describe an example of the cognitive stage, the associative stage, and the autonomous stage during learning the task of operatin
vovikov84 [41]
I don't understand this but can u please help me with history
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3 years ago
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