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zloy xaker [14]
3 years ago
9

Ms. Landford's class is learning to design experiments. The students know that they need to ask a testable question before desig

ning an experiment to answer the question.
What is a testable question the students could ask and then design an experiment to answer?

A. Ms. Landford's class has 12 boys and 13 girls.

B. If a plant is turned upside down, which way will the roots grow?

C. Do squirrels like to climb trees?
Biology
2 answers:
Dovator [93]3 years ago
5 0
A testable question is B. If a plant is turned upside down, which way will the roots grow?
The other options are incorrect because you cannot create some kind of experiment to prove them right or wrong.
Hope that helped you.
Westkost [7]3 years ago
5 0

Answer:

B. If a plant is turned upside down, which way will the roots grow?

Explanation:

A scientific experiment needs to investigate something, to be established later. For this reason, it is important that when carrying out an experiment, a "testable question" is established so that an answer with scientific confirmation is sought.

This testable question must be something that we do not know the answer to, as it is up to the experiment to answer and show facts that prove it. For this reason, we can say that among the options given in the question above, option "B" shows a coherent testable question for an experiment.

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Note the two transcribed and translated DNA strips below. The two strips are identical except for a point mutation, where the fi
jekas [21]

Full question attached

Answer/ Explanation:

The original DNA sequence has a point mutation changing a G to a T. The resulting mRNA produced is always complementary to the DNA from which it is synthesised, so the original mRNA sequence has a T, whereas the mutated mRNA has a U. The tRNA is complementary to the mRNA, so the original has a G, and the mutated has a T.

<h3>Original DNA</h3>

GTTGGCGAATGAACGGAGGCTGACGTCTAAGCCTAGAAAAATTGG

RNA

CAACCGCUUACUUGCCUCCGACUGCAGAUUCGGAUCUUUUUAACC

tRNA

GUUGGCGAAUGAACGGAGGCUGACGUCUAAGCCUAGAAAAAUUGG

<h3>_______________________________________________</h3><h3>Mutated DNA</h3>

GTTGGCGAATGAACTGAGGCTGACGTCTAAGCCTAGAAAAATTGG

RNA

CAACCGCUUACUUGUCUCCGACUGCAGAUUCGGAUCUUUUUAACC

tRNA

GUUGGCGAAUGAACTGAGGCUGACGUCUAAGCCUAGAAAAAUUGG

This is a point mutation called a substitution. This does not affect the entire sequence of the protein, because the mutation is "in frame" meaning the mRNA sequence is still read in the same way by the protein producing machinery. However, it does change the 5th codon from UGC to UGU. If we look up the genetic code, we can see that both of these codons code for cysteine, so there will be no change in the amino acid sequence of the protein

5 0
3 years ago
An organic disorder whose symptoms tend to develop gradually and worsen over time is
Ne4ueva [31]

Answer:

D.

Explanation:

"However, a biopsychosocial approach to treatment is required to address all symptoms, particularly as organic disorders often have affective and relational consequences as well. Psychotherapy and cognitive rehabilitation strategies have been shown to be effective with a variety of acute and chronic organic disorders. Although therapeutic interventions with chronic degenerative conditions, such as Alzheimer’s dementia, cannot produce permanent change, they can optimize the person’s functioning and increase quality of life."-https://link.springer.com/referenceworkentry/10.1007%2F978-0-387-09757-2_36

I hope this helps.

7 0
3 years ago
Read 2 more answers
Will give Brainliest answer
tigry1 [53]
The answer is choice a.
4 0
3 years ago
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A very common type of red–green colorblindness in humans is caused by a mutation in a gene located on the X chromosome. Knowing
Harrizon [31]

Answer:

50%

Explanation:

According to the given information, the allele for the red-green colorblindness is inherited in an X linked recessive manner. Let's assume that the allele X^c is responsible for red-green colorblindness. The woman is normal but had a colorblind father (X^cY). Fathers give their X chromosomes to the daughters while their Y chromosome is transmitted to their sons. The sons get their X chromosomes from the mother.

The colorblind father has transmitted the X-linked allele for the red-green colorblindness to his daughter. Therefore, the genotype of the woman is X^cX. The woman would produce two types of eggs: 50 % with X^C and 50% with X. Therefore, 50% of sons of this woman would get X linked allele for the red-green colorblindness and would be affected by the disorder while the rest 50% of her sons will be normal.

7 0
4 years ago
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What advantage do the offspring of a dandelion have by reproducing asexually?
Minchanka [31]

Answer:

a. Reproduction occurs rapidly

Explanation:

asexual reproduction can occur rapidly, more quickly than sexual reproduction

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3 years ago
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