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skelet666 [1.2K]
3 years ago
11

One student did an experiment to find out if fertilizer can make plants grow taller. The steps of the experiment are listed belo

w. Take three pots of the same size. Fill the pots completely with the same type of soil. Plant tomato seeds in the pots of soil. Add different amounts of fertilizer to the three pots. Keep the first pot inside the house, the second pot under the shade of a tree, and the third pot in direct sunlight. Add the same amount of water to the pots every day. Measure the heights of the plants after regular intervals. The results of the experiment were not valid. Which of these statements best describes a flaw in the experiment?
Biology
2 answers:
Kruka [31]3 years ago
3 0

That is wrong. The answer is actually the letter B

nasty-shy [4]3 years ago
3 0

The amount of fertilizer was not the controlled variable.

A control variable is the one which does not receive any treatment in the experiment. Instead it is used to compare the changes in the experimental variable. The control variable remains unchanged in an experiment.

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In a particular species of frogs, black spots are a dominant trait and their absence is a recessive trait. In a population of fr
kipiarov [429]

The expression which is the correct way to calculate the frequency of the dominant allele is 134/200. Thus, the correct option is D.

<h3>What is Allelic frequency?</h3>

The allelic frequency may be defined as the sum total of all the alleles of a gene in a population. It represents the overall genetic diversity within a population.

The allelic frequency is calculated by the formula when the genotypes are given in number. It is as follows:

2 × Number of Purebred dominant + Number of heterozygous/ 2× Total number of individuals in a population.

∴ Allelic frequency of dominant allele = 2 × 50 + 34/ 2× 100 = 134/200 = 0.67.

The allelic frequency of the Dominant allele is 0.67 while the allelic frequency of the recessive allele is 0.33.

Therefore, it is well described above.

To learn more about Allelic frequency, refer to the link:

brainly.com/question/14649601

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5 0
2 years ago
Which kingdom in the domain Eukarya best classifies photosynthetic, multicellular organisms that have specialized tissues?
klasskru [66]
Plantea for sure. hope this helped :)
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3 years ago
An important difference between a series and a parallel circuit is that a series circuit cannot have any breaks. A parallel circ
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Answer:

Yes.

Explanation:

Parallel circuit are those types of circuits in which break in one branch does not prevent the flow of current in the circuit and the current can still flow through another branch because there are more ways through which the current moves to other sources while on the other hand, series circuit refers to those circuits in which break in one branch can prevent the current flow in the circuit and the other sources can't receive current due to broken of the connection.

7 0
3 years ago
2.
castortr0y [4]
I believe It is A because fissure eruptions are common on large volcanoes and also is built up by many layers of hardened lava, tephra, pumice, and volcanic ash.
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