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2 years ago

PLEASE HELP MARKING BRAINLIEST!!!!!!

Biology

1 answer:

bazaltina [42]2 years ago

3 0

Answer No 1)

The purpose of the lab was to test the effects of different fertilizers on the growth of plant.

The hypothesis was that if organic fertilizers are used, they could make the plants grow taller.

The independent variables will be the different fertilizers which were being used. The dependent variable will be the growth or height of the plants. The controlled variable will be the plants to which no fertilizers will be added.

Answer No 2)

The hypothesis proposed by John was wrong. John proposed that the plants who were given organic fertilizers will grow the most. On the other hand, when experiments were performed plants which were given chemical fertilizers grew more as compared to the plants which were given organic fertilizers.

Answer No 3)

We can improve the experiment by checking out more number of plants instead of just one plant for each category. fertilizers also. This is because using only one plant for each category might not have provided the best authentic results. The experiment can be beneficial as it will allow the usage of fertilizers which will give enhanced growth in plants.

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Dr. kitty hauke is studying lobsters in maine. she noticed that over several years the average length of pincers had increased w

zimovet [89]

I believe if her hypothesis was incorrect the percentage of the large lobsters with large pincers would decrease. The large pincers help the lobsters to quickly catch their pray efficiently. This would mean the survival of the lobsters with large pincers. A wrong hypothesis would mean that the large pincer lobsters would die and decrease in number.

4 0

2 years ago

Read 2 more answers

Which factor will not affect the strength of a solenoid

antoniya [11.8K]

Answer: A solenoid is a long coil of wire wrapped in many turns. When a current passes through it, it creates a nearly uniform magnetic field inside.

* Solenoids can convert electric current to mechanical action, and so are very commonly used as switches.

* The magnetic field within a solenoid depends upon the current and density of turns.

* In order to estimate roughly the force with which a solenoid pulls on ferromagnetic rods placed near it, one can use the change in magnetic field energy as the rod is inserted into the solenoid. The force is roughly

change in magnetic field energy

force on rod = ---------------------------------------------------

distance rod moves into solenoid

* The energy density of the magnetic field depends on the strength of the field, squared, and also upon the magnetic permeability of the material it fills. Iron has a much, much larger permeability than a vacuum.

* Even small solenoids can exert forces of a few newtons.

=> AFFECTS OF STRENGTH OF SOLENOID:

There are many factors and I cannot go fully into them here.

* Materials, size and duty of the solenoid all affect the operation. A solenoid, as you know, is a coil with an element which moves as a result of power being applied and removed. A simple switch.

* Clearly the more windings you have for set conditions of voltage will generate a greater field strength. The windings excite a core and the material of that core has a significant effect.

* The moving element can easily be made to suit power transfer requirement.

* So you need to understand application and work backwards. There may even be a solid state solenoid which can do the same thing.

Read more on Brainly.in - https://brainly.in/question/7747489#readmore

Explanation:

8 0

2 years ago

ANSWER IN TEN MINUTES GET BRAINLEST ANSWER!!!!!!!!!!!!!!!!I had a lab but I don't know this answer help will be very appreciate

Leokris [45]

Best Answer: Well, you have to look at the onion slide under the microscope and looks at each cell and tell what stage (interphase, prophase, etc.) they are in. and then for the description probably tell which one there is the most of and maybe why you think that is. You can find pictures of each phase in your book. I did a lab like this not too long ago in my bio class lol. And, i believe that you will get a lot in interphase (when cells are not currently dividing), just to let you know.

3 0

2 years ago

Identify the two major savannas of South America and explain how they are distinctly different from each other. Read More >&g

Mama L [17]

Pampas and Patagonia

The Pampas are prolific South American marshes that comprise more than 750,000 km2 and combine the Argentine territories of Buenos Aires, La Pampa, Santa Fe, Entre Ríos and Cordoba. The vast fields are a common region, suspended only by the low Ventana and Tandil hills, near Bahia Blanca and Tandil Argentina, with an elevation of 1,300 m (4,265 ft) and 500 m (1,640 ft), sequentially.

Patagonia is a sparsely populated area at the southerly end of South America, administered by Argentina and Chile. The district encompasses the southerly segment of the Andes hills and the sands, pampas, and meadows to the east. Patagonia is one of the rare areas with shores on three oceans, with the Pacific Ocean to the westward, the Atlantic Ocean to the east, and the Southern Ocean to the South land.

8 0

2 years ago

Which of the following claims about the TYR, TRP2, and TRP1 mammalian genes is most likely to be accurate?

Illusion [34]

The TYR, TRP2, and TRP1 genes are located next to each other on a single chromosome and are organized into an operon is most likely to be accurate.

The option a is correct.

Explanation:

The genes for the Tyrosinase, TRP2 and TRP1 are located on the same chromosome and are operons. These are operons because they are controlled by same transcription factors on mRNA.

Tyrosinase enzyme is important for the synthesis of melanin, eye pigments and hair colour. The synthesis of all these is completed in three distinct reactions catalysed by TRP1, TRP2 and Tyr genes. These work as operon and the protein product is almost 40% similar of the three genes.

The amount of melanin production depends on tyrosinase enzyme activity of all the three genes.

The genetic regulation is done by operons.

4 0

2 years ago