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mixer [17]
4 years ago
6

In science class, Maria observes that a white-colored flower has shades of red when it’s watered with red-colored water. She for

ms a hypothesis that the color reaches the flower through the stem. What should Maria do to confirm the hypothesis?
Biology
2 answers:
finlep [7]4 years ago
5 0
She could remove the stem of a flower of the same species and place it back in the red-coloured water as a control experiment and observe if a colour change takes place. If not, then it confirms her hypothesis.
stiks02 [169]4 years ago
4 0

Answer:

An observation was recorded by the Maria in the class that white flowers show red patches when colored with the stem. She proposed the hypothesis that color reaches the flower through the stem.

To test the hypothesis she will perform a "scientific experiment" where she would divide the samples into two groups: control and experimental. In the control samples, she will grow the plants in red samples with no stem whereas in the experimental group she will grow the samples in different concentrations of red color with stems. This will help confirm her hypothesis.

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3 years ago
In a hardy-weinberg population with two alleles, a and a, that are in equilibrium, the frequency of the allele a is 0. 3. What i
zavuch27 [327]

Here, given-

homozygous alleles 'a' have a frequency of 0.3.

Also the alleles are in equilibrium in a Hardy-Weinberg population. The frequency of individuals that are homozygous for this allele are= 0.49.

The Hardy-Weinberg equilibrium can be defined as the principle which states that the variation in the genetic makeup of a population remains constant and unchanged till there are no external interferences, influencing the population.

Calculation-

p + q = 1\\0.3 + q= 1\\q= 1- 0.3\\\\q= 0.7

Then to find the frequency of the individuals homozygous for this allele the following formula needs to be used-

p^{2} + 2pq + q^{2} =1

p^{2} = dominant homozygous frequency\\2pq= heterozygous frequency\\q^{2} = recessive homozygous frequency\\

Thus, the individuals homozygous for the allele can be calculated by q^{2} = (0.7)^{2} \\= 0.49

Learn more about the Hardy-Weinberg equilibrium here-

brainly.com/question/16823644

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4 0
2 years ago
A region generally is higher than an adjacent region if ____________ than in the adjacent region.
Ivahew [28]
The crust is higher
7 0
3 years ago
1.How would you differentiate your heart rate before and after exercising?
KATRIN_1 [288]
Your heart rate before exercising would probably be the at rest rate of say about 50-60 beats per minute whereas immediately after exercise it could easily be say 115-130 and depending on age there is an optimum heart rate for each age range which decreases somewhat with age. Timing for a full minute your heart rate is best as it will give the actual count whereas if you just do it for 10 seconds and then multply by 6  it would assume it will be consistent whereas it could decrease during the minute so the actual measured count for a full minute is more accurate.
8 0
3 years ago
Read 2 more answers
I nee help brinlist i will give it to you
Montano1993 [528]

Answer:

A

Explanation:

The energy carried by electromagnetic waves is sometimes referred to as radiant energy. Electromagnetic waves do not require a medium for propagation hence they can travel through vacuum and are known to transmit enormous amount of energy.

Electromagnetic waves transmit energy away from the source of the wave. Hence the answer chosen in the answer section above.

3 0
3 years ago
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