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aev [14]
3 years ago
13

Mary is conducting an experiment on how pollution affects plant growth. How can she ensure that her data are reliable? by repeat

ing trials during an experiment by keeping the results private by recording values without units by making a single observation
Biology
2 answers:
yulyashka [42]3 years ago
8 0

Answer:

A

Explanation:

Ipatiy [6.2K]3 years ago
7 0

Answer:

a) By repeating trials during an experiment

Explanation:

In science, repetition during experimentation is extremely important and fundamental. By repeting experiments, the researcher ensures that results are reliable and not due to a single factor or coincidence. If the same result is observed after several repetitions, then it could indicate that x factor is responsible for x result.

After this observation, the researcher will be able to analyze data statistically and discuss it in order for other scientists to repeat this methodology and explain a specific phenomenon accurately and thoroughly.

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A scientist thinks that a certain chemical is a mutagen. She exposes plant cells to a large amount of this chemical in the labor
PSYCHO15rus [73]

A mutation is an alteration in the original DNA sequence.  Option 3. The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.

<h3>What is a mutation?</h3>

A mutation is a stable and hereditably change in the genetic material.

Mutations alter DNI sequences and introduce new variants. Many of these variants are eliminated, but some of them might succeed and be incorporated in each individual, affecting the entire species.

They can be damaging or beneficial. These last mutations are the ones that have been selected by natural selection.

Different mutagenic agents cause changes in genetic information, increasing mutations over the normal level. They can change the bases sequences and bases pairing.

Mutations depend on each group's environment and its ecological pressures, and they accumulate in time. They are inherited to the followings generation and get to spread.

According to this framework, the correct option is 3. The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.

If the analyzed chemical is a mutagen, then it will cause an alteration in the DNA sequence and this change -mutation- will pass to the following generations spreading in the population.

You can learn more about mutations at

brainly.com/question/13923224

brainly.com/question/9598940

brainly.com/question/17106056

#SPJ1  

A scientist thinks that a certain chemical is a mutagen. She exposes plant cells to a large amount of this chemical in

the laboratory

Which statement best provides evidence that the substance is a mutagen?

  1. The cells die within hours of being exposed to the chemical.
  2. The cells grow more quickly than those that were not exposed to the chemical.
  3. The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.
  4. The cells continue to divide at the same rate as before they were exposed to the chemical.
3 0
2 years ago
Students in a science class were asked to investigate how missing or damaged organelles affect cellular homeostasis for cells fo
lora16 [44]

Answer:

B. At what rate do the mitochondria of the cell need to convert glucose to usable energy molecules to meet the high energy needs of the cell?

Explanation:

Organelles are specific in their functioning and hence, each organelle contributes its own quota to the cell's proper functioning. According to the question, a muscle tissue is being worked on to determine the effect of a missing or damaged organelle on its cell.

Mitochondria are organelles found in all eukaryotic living cells. They are the organelles responsible for the synthesis of ATP (energy) used by the cell as a result of the glucose that gets converted in them during cellular respiration.

Therefore, to determine if the muscle cells are functioning properly, the question that: At what rate do the mitochondria of the cell need to convert glucose to usable energy molecules to meet the high energy needs of the cell? should be asked.

Note that, Chloroplast and cell wall are not found in muscle cells, which is an animal cell. Likewise, ribosomes are not organelles for synthesis of glucose.

3 0
3 years ago
The right and left coronary arteries are the first branches off the a. aorta. b. superior vena cava. to. pulmonary trunk. d. pul
Zepler [3.9K]

Answer:

answer is A aorta

Explanation:

aorta is the answer

8 0
3 years ago
Which organism pictures is not an autotroph
professor190 [17]
An autotroph is an organism capable photosynthesis or chemosynthesis through reducing carbon dioxide, fats, sugars and/or proteins in a repetitive cycle of energy production and use to support its life. these include all plants, algae and certain bacterium.

its counterpart is the heterotroph which is reliant on outside sources for their means of energy. aka tertiary consumer: animals, fungi and certain bacterium
7 0
3 years ago
Read 2 more answers
List 3-5 sources of protein.
ahrayia [7]
Seafood, white mean, eggs, milk/dairy, Beef
8 0
3 years ago
Read 2 more answers
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