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arsen [322]
3 years ago
6

This lab activity is designed to explore the effect of two substances on the heart rate of a Daphnia magna specimen. One of the

activities in this lab is to measure the heart rate when the Daphnia is exposed to alcohol. In the experimental setup, what would be the independent variable?
Biology
1 answer:
erastova [34]3 years ago
5 0

Answer is given below

Explanation:

  • Heart rate was studied in this experiment and is the dependent variable studied or measured. This is a dependent variable.
  • An independent variable is a variable whose modulation is not affected by any other variable in the experiment. Here is the alcohol independent variable.
  • Other substances such as intelligence are also independent variables.
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Match the steps in the cell cycle in the correct order
Tcecarenko [31]

Answer:

1. Chromosomes line up - metaphase

2. Cell growth - G1

3. Final preparations for division - G2

4. Chromosomes get pulled apart - anaphase

5. DNA replication - S

6. Chromosomes condense - prophase

7. Chromosomes uncoil and nucleus reforms - telophase

8. The cytoplasm and organelles divide, and now there are two identical cells - cytokinesis

Explanation:

There are four primary phases, or stages, in the cell cycle, which is a systematic process. Each stage has a goal that has to be achieved before moving on to the next. G1, S, G2, and mitosis are the stages.
There is growth during the G1 phase. A lot of protein is produced and water is pumped in, increasing the volume of the cell. The DNA is also examined at this time to see whether there has been any damage. The G1 phase precedes the S phase, therefore before going into S phase, the cell must make sure it has enough energy reserves.

The cell duplicates its DNA during the synthesis phase, also known as the S phase. DNA content doubles due to the duplication of all chromosomes. The compact state of DNA is created by proteins, which do not exist in and of themselves. Therefore, in order to ensure that the new DNA is properly packed when DNA is replicated, new packaging proteins must be produced. Histones are the proteins that house DNA. The production of new DNA is closely linked to the production of new histones.

A cell multiplies its organelles during the G2 phase. Right before the cells divide into two distinct cells during mitosis, the G2 phase occurs. There must be distinct functioning organelles in each daughter cell. Organelles like the golgi and endoplasmic reticulum are linked networks of sizable membrane pouches that may change size. Other organelles, including mitochondria and chloroplasts, are separate structures that must separate similarly to how cells do.

The process of physically dividing a cell into two daughter cells is called mitosis. Prophase, metaphase, anaphase, and telophase are its four basic stages. The nuclear membrane deteriorates as the chromosomes thicken during prophase. The center of the cell's chromosomes align during metaphase. One chromosome splits in half during anaphase, sending one half to either side. The telophase is characterized by the pinching together of the cell's centre to form two separate cells.

6 0
2 years ago
although the digestive system is primarily responsible for the breakdown of food, this process can be disrupted if the circulato
stepan [7]
<span>If the circulatory system malfunctions, all other systems are affected. In living, this system is vital for all organisms. Muscles and organs will not get the necessary nutrients and energy to perform their tasks if even one of the systems are affected. In this case as well, the relation between circulatory and digestive system is crucial. Digestive system can no longer break down food in order to convert them to energy, and tissues and organs can no longer absorb these nutrients to the body, as all cycles in the body are interconnected, the body will deteriorate resulting to cell and tissue death.</span>
5 0
3 years ago
Human impact on the environment can be seen in the deterioration of the alps.
Elanso [62]

Answer by YourHope:


Answer is true!!


Human impact on the environment CAN be seen in the deterioration of the alps!!!


:)

8 0
3 years ago
Read 2 more answers
Why are producers vital to all other organism?
inysia [295]
Producers help the food chain keep going. Without them, there would not be smooth flow.
3 0
4 years ago
Why to introduced species thrive and multiply so easily in their new habitats
PolarNik [594]
Actually depends on the species. Take snakes for example. They quickly thrived here in america because they had similar environements over in europe. The warm climate here in florida is perfect for them. They like the heat of the sun the dense foliage and many other good qualities here. Also their are other places that are good as long as they are hot have water and prey and a nice hole they can sleep in they can survive making them very adaptable. 
7 0
3 years ago
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