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3 years ago

I REALLY NEED HELP!!!!!!!!

1 answer:

6 0

A decomposer is an organism usually a bacteria or fungus that decomposes organic material.
Decomposers are considerd the last tropic level because they feed on everything.

Hope it helped!

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The connecting piece of a sperm is packed with what that produces energy?

devlian [24]

The answer to this is Gonads.

8 0

3 years ago

The process of phagocytosis involve all of the following except

evablogger [386]

Hello, I figured your question was missing its options so I went online to find them. Here they are:

The process of phagocytosis involves all of the following EXCEPT :

a. adhesion.

b. secretion of cytotoxins.

c. elimination.

d. vesicle fusion.

e. chemotaxis.

Answer:

The correct answer is: b) secretion of cytotoxins.

Explanation:

Phagocytosis is a mechanism performed by cells in which the plasma membrane engulfs a large particle. Phagocytosis is used by cells in the immune system to ingest pathogens like viruses and bacteria.

Phagocytosis consists of many steps:

activation - the phagocytes that were resting are activated in the inflammatory response when a pathogen enters the body.
chemotaxis - this refers to the process in which the phagocyte moves to the pathogen by following the chemical factors released by these germs.
adhesion - the phagocyte attaches to the pathogen.
ingestion /vesicle fusion - the phagocyte sends pseudopods to engulf the pathogen, and places it in a phagosome, which is an endocytic vesicle. The phagosome and the phagocyte will fuse so the pathogen gets inside.
elimination - the pathogen is destroyed in the phagocyte by the lysosomes present in it.

The secretion of cytotoxins is not a part of the phagocytosis, and is a process exclusive to T cells (leukocytes that lack the ability to phagocyte).

5 0

3 years ago

Solid sodium reacts with liquid water to form hydrogen gas according to the equation 2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g) Wha

lana66690 [7]

Answer: 21850.42mmHg or 28.78atm

Explanation: From the equation of the reaction, 2 moles of sodium reacts with 2 moles of water to produce 2 moles of NaoH and 1 mole of hydrogen gas at s.t.p.

molar volume of gas at s.t.p. = 22.4dm^3,

standard temperature = 0°C or 273K,

standard pressure = 760mmHg or 1atm,

molar mass of Na = 23g;

volume of the container= 20L or 20dm^3

From the equation, 2 moles or 46g of Na produces i mole or 22.4 dm^3 of hydrogen.

Therefore, 1kg or 1000g of Na will produce 22.4 * 1000/(46)= 486dm^3 of hydrogen.

To find the pressure of the gas produced, the formula P1V1/T1 = P2V2/T2

P1= 760mmHg, T1= 273K, V1 (initial volume of gas)= 486dm^3, T2=50.0°C or 50+273K= 323K, V2( final volume of gas= volume of vessel)=20dm^3 P2=?

P1= P1V1*T2/(V2T1)= 760mmHg * 323/(273)= 21850.42mmHg or 1atm*21850.42/760= 28.78atm

5 0

3 years ago

For an occupational therapy assistant, do certain areas of the country have a better outlook? And where?

olga_2 [115]

Answer - Yes! of course. For better outlook you want to be in a city like Miami, FL U.S or someone populated cause that is where your able to find patients in need of recover. Other then that we will always need occupational therapy assistant because its crucial to the recover with some help and maintenance.

Reasoning - It is in fact true because in a city you can find a populated are that probably fractured their hand and needs some assistant for help recovery if the main doctor is not there.

3 0

4 years ago

What do you think would happen if producers did not exist ?

yan [13]

Well for starters, producers are living organisms that produce their own food. Like plants. And plants ironically provide us humans with oxygen as they live off of the carbon dioxide we produce. Some plants are also main vegetables that we eat, so put simply, a world without producers would be practically oxygen-less and vegetable-less.

8 0

3 years ago