What is an important characteristic of the plant cell wall? A.It is fluid.
B.It is rigid.
C.It is alive.
D.It stretches.


Answer 1
Answer: The best and most correct answer among the choices provided by the question is the second choice "It is rigid."

The plant cell wall is composed of cellulose. Cellulose is a structural carbohydrate and is considered a complex sugar because it is used in both protection and structure. The plant cell wall consists of three layers. Each layer has its own unique structure and function.

I hope my answer has come to your help. God bless and have a nice day ahead!

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Name three properties you could use to distinguish a proton from an electron?


Electrons are negatively charged particles while protons are positively charged particles. Electrons have very little mass while protons are massive particles.

The atom is composed of three fundamental particles which are;

  • Electrons
  • Protons
  • Neutrons

The electrons are found in orbits. They all exist outside the nucleus. On the other hand, the protons are found inside the nucleus.

Electrons are very light particles. The electron has an infinitesimal mass while the proton is a massive particle. The proton is 1840 times heavier than the electron.

An electron has a negative charge. This can be easily seen when electrons are deflected in an electric field. Protons are positively charged and are deflected accordingly in an electric field.

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A proton is positive, Its in the center of the atom, electrons are on the outer orbits of the atom.

A student is studying a process in which a diploid cell becomes haploid. Which of these shows the CORRECT mathematical model for the process if Nnew is the number of chromosomes in the haploid cell and Nold is the number of chromosomes in the diploid cell?



N new = Nold /2.


Meiosis may be defined as the process of cell division in which a single parent cells divides into the four daughter cells. The meiosis occurs generally in the gametic cells.  

Here, the diploid cells becoming the haploid cells, it means the chromosome number is reduced to half in the new cell. This can be represented mathematically as  N new = Nold /2..

Thus, the answer is N new = Nold /2.

I don't see any models, but when a cell turns from Diploid to Haploid, its number of chromosomes is halved or divided by 2.
So if Nnew is: 23 or n = 23 , then Nold will be: 46 or 2n = 46

What will most likely happen if the plankton population decreases in this ocean system?



Planktons are a microscopic organism, that grows in oceans and seas plankton is made up of tiny plants known as phytoplankton. They require water, nutrients for their growth. They are green in color because of chlorophyll present in them which helps them to perform photosynthesis and they creating their food carbon dioxide and sunlight.

Small fishes, shrimps and some large species of fish such as whales consume them as their main food source. These fishes are prey for marine mammals in food chain. Dead phytoplanktons nourish bottom dwellers & shellfish. If the plankton population decreases in this ocean system it collapse entire marine system.

Shrimp and salmon will have more difficulty finding food.


What component of the brain makes teenagers seek constant validation by sharing selfies with friends on social media?



Nucleus Accumbens

Explanation:Nucleus Accumbens - it is that part of the brain situated in the basal forebrain. it main function lie in reward and pleasure. it helps us to translate the willpower into actions. "it plays a major role in learning , laughter, aggression, etc. "

Nucleus accumben lies in each hemisphere of the brain.  it is divided into two main parts i.e. shell and core.

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