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3 years ago

What is the most difficult part of a controlled experiment?

Biology

2 answers:

siniylev [52]3 years ago

8 0

Answer:

The correct answer is option 1.) "testing only one variable".

Explanation:

One of the basis of scientific experimentation is to test one variable at the time in order to make sure that the obtained results are a direct consequence of the variable of study. However, testing only one variable at the time is not an easy task. It is necessary to establish a negative control which only difference is the absence of the variable, and a positive control using a variable that the scientist know is going to produce a response.

Anna71 [15]3 years ago

4 0

1. Testing only one variable
A controlled variable means its the one that stays the same. In a controlled experiment, it means there is only one manipulated, (changed) variable.

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The constancy of the chromosome number from one cell generation to the next is maintained through.

vesna_86 [32]

Through mitosis, the number of chromosomes is kept constant from one cell generation to the next.

<h3>What occurs during mitosis?</h3>

A cell divides into two identical daughter cells after duplicating all of its components, including its chromosomes. Due to the importance of this procedure, specific genes carefully regulate each phase of mitosis. Health issues like cancer may develop when mitosis is improperly controlled.

<h3>How many phases of mitosis are there?</h3>

Prophase, pro metaphase, metaphase, anaphase, and telophase are these stages.

<h3>What function does mitosis serve?</h3>

Mitosis' purpose is to divide the genome so that the two daughter cells inherit an identical and equal number of chromosomes.

<h3>Where in the cell cycle does mitosis occur?</h3>

The mitotic phase, which consists of mitosis and cytokinesis and produces two daughter cells, begins after interphase. Despite the fact that the two processes frequently overlap, mitosis occurs before cytokinesis.

learn more about mitosis here

<u>brainly.com/question/19058180</u>

#SPJ4

4 0

2 years ago

Please help I dont understand and it will be nice for someone to help!!!!!!!!!!!!!!!!!

andre [41]

It is b density ! Good luck sorry if late

3 0

3 years ago

Examine the following genetic sequences and determine which pair are the most similar based on their ED (evolutionary distances)

kakasveta [241]

Answer:

Species 1 = ATTGGCCATT and Species 3 = TTTGGCCATT are the most similar.

Explanation:

Evolutionary distance (ED) is defined as the total number of substitutions of nucleotide in one site between two DNA sequences that are homologous. It is also referred to as the number of substitutions of amino acid in one site between two protein sequences that are homologous. Based on the definition of ED, the two most similar species are species 1 and 3.

8 0

3 years ago

Define "CFU.” Why is this term used instead of simply using "cell count"?

cestrela7 [59]

That are used to prevent the growth of specific microbes or it simply lacks be calibrated to a viable cell count to express microorganisms as CFU/ml, CFU stands for Colony Forming Units, a microbiology term used to quantify how unit-cfu-colony-forming-unit-cfu-ml-cfu-g-cell-count-microbial- counting.

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3 years ago

What does it mean when two sets of chromosomes are homologous?

Reil [10]

It means that two chromosomes have the same genes, or variations fo the same genes at the same loci on the chromosomes. Variation of the same gene is what makes up alleles. Homologous chromosomes are similar in size and structure. In diploid organisms, each chromosome in the pair is derived from each parent.

7 0

4 years ago