Mila Mitchell

EduRev ACT

Mila Mitchell
EduRev ACT
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Discussed Questions
Janhavi Khanna upvoted   •  2 weeks ago

Bulbs of Garlic/Onion have
  • a)
    Greatly reduced stems
  • b)
    No stem
  • c)
    Extensive root system
  • d)
    No leaves
Correct answer is option 'A'. Can you explain this answer?

Bs Academy answered
Life cycle of any sexually reproducing plant consists of two morphological phases i.e., haploid gametophyte and diploid sporophyte that regularly alternate with each other. This phenomenon is termed as alternation of generation.

Janhavi Khanna upvoted   •  Nov 09, 2024

At dynamic equilibrium the concentration of  the reactants and products are ____________
  • a)
    equal
  • b)
    sometimes equal sometimes not equal
  • c)
    cannot predict
  • d)
    remain constant
Correct answer is option 'D'. Can you explain this answer?

Ciel Knowledge answered
Understanding Dynamic Equilibrium
  • Dynamic equilibrium refers to a state of balance achieved by two processes occurring at the same rate. In the context of chemical reactions, it describes a condition where the rate of the forward reaction is equal to the rate of the backward reaction.
  • At dynamic equilibrium, the concentrations of the reactants and products do not change because the rates of the forward and backward reactions are the same. This is a state of balance, but not necessarily a state of equality.
Difference in Concentrations of Reactants and Products
  • The concentrations of reactants and products at dynamic equilibrium are not necessarily equal. They are constant, but not necessarily the same.
  • The relative concentrations of the reactants and products at equilibrium depend on the specifics of the reaction, including the equilibrium constant.
  • The equilibrium constant, represented as K, is the ratio of the concentrations of the products to the reactants at equilibrium. If K is greater than 1, the concentration of the products is greater than the reactants at equilibrium. If K is less than 1, the concentration of the reactants is greater than the products at equilibrium.
Conclusion
So, the correct answer is d. remain constant. At dynamic equilibrium, the concentration of the reactants and the products are constant. 

Janhavi Khanna upvoted   •  Oct 26, 2024

A Prothallus is
  • a)
    A structure in pteridophytes formed before the thallus develops
  • b)
    A sporophytic free living structure formed in pteridophytes
  • c)
    A gametophyte free living structure formed in pteridophytes 
  • d)
    A primitive structure formed after fertilization in pteridophytes
Correct answer is option 'C'. Can you explain this answer?

Ciel Knowledge answered
  • Prothallus is a free-living, mostly photosynthetic thalloid gametophyte.
  • It is formed during the life cycle of Pteridophyte.
  • The pteridophyte is a sporophyte i.e. the main plant body is diploid
  • These spores formed inside the sporangia which are borne on the sporophylls.
  • The germination of spores is exosporic i.e. in the soil.
  • These spores germinate to form the gametophyte which is haploid.
  • The gametophyte formed is called prothallus and it is independent as the germination took place outside the sporophyte body in the soil.
  • Prothallus male and female sex organs are called antheridia and archegonia, respectively.
  • Water is required for the transfer of antherozoids – the male gametes released from the antheridia to the mouth of the archegonium.
  • Fusion of the male gamete with the egg present in the archegonium results in the formation of a zygote.
  • The zygote thereafter produces a multicellular well-differentiated sporophyte which is the dominant phase of the pteridophytes.
  • The sporophytic plant undergoes meiosis to form haploid spores.
  • Haploid spores divide by mitosis to form a haploid gametophyte once again. 
... more

Janhavi Khanna asked   •  Jun 08, 2024

Assertion: Both ammonia and urea are excreted by earthworms.
Reason: Excretion in earthworm depends on the environment.
  • a)
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  • b)
    If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
  • c)
    If Assertion is true but Reason is false.
  • d)
    If both Assertion and Reason are false.
Correct answer is option 'A'. Can you explain this answer?

Bhaskar Goyal answered
Assertion: Both ammonia and urea are excreted by earthworms.

Reason: Excretion in earthworm depends on the environment.
There are different types of excretory products produced by earthworms, including ammonia and urea. Let's break down the assertion and reason given in the question:
- Ammonia and Urea Excretion:
- Earthworms excrete both ammonia and
... more

Janhavi Khanna asked   •  Jul 19, 2023

How can I check my NEET exam results and rank?

Mihir Basu answered
How to Check NEET Exam Results and Rank:

1. Visit the Official Website:
- Open your web browser and go to the official website of National Testing Agency (NTA) - www.nta.ac.in.

2. Find the NEET Result Link:
- Look for the "NEET 2022 Results" link on the homepage of the NTA website.
- Click on the link to proceed to the result page.

3.
... more

Janhavi Khanna asked   •  Jan 14, 2023

In the experiment for the determination of the speed of sound in air using the resonance column method, the length of the air column that resonates in the fundamental mode, with a tuning fork is 0.1 m. When this length is changed to 0.35 m, the same tuning fork resonates with the first overtone. Calculate the end correction.
  • a)
    0.012 m
  • b)
    0.025 m
  • c)
    0.05 m
  • d)
    0.024 m
Correct answer is option 'B'. Can you explain this answer?

Riya Banerjee answered
Let the end correction of given organ tube be e.
Fundamental frequency of first tube with end correction is given as,
where, l1 is original length of tube.
First overtone frequency of resonance tube with end correction is given as,
where, l2 is original length of second tube.
According to question, f1 = f2

Janhavi Khanna asked   •  Dec 08, 2022

In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of
  • a)
    bundle sheath
  • b)
    phloem
  • c)
    epidermis
  • d)
    mesophyll
Correct answer is option 'D'. Can you explain this answer?

In mesophyll cells of C4 plants , enzyme PEPcase is present which fix CO2. The first stable product formed is OAA and then it gets converted into Malic acid, a 4 carbon compound. Hence C4 cycle occurs in mesophyll cells.

Janhavi Khanna asked   •  Aug 21, 2022

Dead space air is _______
  • a)
    150 CC
  • b)
    350 CC
  • c)
    500 CC
  • d)
    1500 CC
Correct answer is option 'A'. Can you explain this answer?

Ajay Yadav answered
Dead space air is 150 CC. Dead space air represents the volume of air that does not participate in the gaseous exchange and remains in the lungs. It can’t be expired or inspired or altered.

Janhavi Khanna asked   •  Jul 21, 2022

What is the catalyst used in contact process in the conversion of Sulphur dioxide to Sulphur trioxide?
  • a)
    Finely divided iron
  • b)
    Molybdenum
  • c)
    Vanadium pentoxide
  • d)
    Platinum
Correct answer is option 'C'. Can you explain this answer?

Dev Patel answered
After burning Sulphur in the presence of oxygen the formed Sulphur dioxide needs to be reacted with oxygen to form Sulphur trioxide. It is an exothermic reaction and vanadium pentoxide is used as the catalyst.

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