which of the following is not classified as a pure substance a. table soft b. air c. nitrogen d. gold

Answers

Answer 1

The substance that is not classified as a pure substance is option a

Explanation:

table soft


Related Questions

I need help with any question, thanks.

Answers

I can help!let me know if you need any FREE tutoring I teach grades 6-12!!

observe the given relation and fill in the blanks cucumber: tendril citrus: meiosis: reduction division mitosis:​

Answers

Answer:

citrus: thorns

mitosis: equational division

Explanation:

From the relationship:

Tendrils are thread-like appendages found in most climbing plants. They primarily function as supporting organs for climbing plants (such as cucumber) by stretching out and twinning around physical supports. The equivalence of this in citrus is the thorn.

Meiosis is a reductional cell division in which the chromosome number of the daughter cells is half of that of the other cells. Mitosis is equational division because the chromosome number of the parent cell is the same as that of daughter cells.

How does reproductive isolation cause speciation?
A. It flows interbreeding.
B. It stops adaptive radiation.
C. It reduces gene flow.
D. It prevents divergence.

Answers

Answer:

C. It’s reduces gene flow.

Explanation:

Reproductive isolation cause speciation as it reduces gene flow. Therefore, the correct option is C.

Mechanisms that prevent or restrict the exchange of genetic material (gene flow) between populations are called reproductive isolation. When reproductive isolation occurs, populations become genetically isolated from each other, resulting in different evolutionary paths. This may eventually lead to the speciation or evolution of new species. Reproductive isolation limits the exchange of genetic variation between populations by limiting gene flow. This means that genetic changes, such as mutations or genetic drift, that occur in one population do not affect other populations in the same way.

Therefore, the correct option is C.

Learn more about Reproductive isolation, here:

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Jenny's grandmother holds the newspaper at arm' length when reading it.  i. What is most likely the cause of this condition? ​

Answers

Answer:

her grandmother's arm is stronger than her armpit

Presbyopia is the gradual loss of your eyes' ability to focus on nearby objects. It's a natural, often annoying part of aging.

Presbyopia usually becomes noticeable in your early to mid-40s and continues to worsen until around age 65. You may become aware of presbyopia when you start holding books and newspapers at arm's length to be able to read them.

pls help I don’t understand this yet since I wasn’t able to understand during school year

Answers

Answer:

D.

Explanation:

recessive is lower case and the other word that starts with "H" means same

Cattle ranchers would rely on which forecast to best care for their livestock?
Wet Bulb Globe Temperature Forecast
Heat Stress Forecast
Heat Index Forecast
Precipitation Forecast

Answers

Answer:

Heat Index Forecast

Explanation:

Weather forecasts help the farmers to lower plant productive and pests. Applying disease control and controlling the crops pest and unwanted guests.  The heat index forecast is an index that combines the use of temperatures and humidity.  It is condition that is expressed in outdoor activity. Livestock ranchers have to find places to keep their cattle can freely graze hence forecast method is important for taking care of their livestock.

Answer: heat stress forecast

Explanation:

First of all go vegetarian, don’t eat precious cows. Second of all it’s heat stress forecast that’s what comes up when you search it ( meat industry- ew)

Which statement accurately describes the relationship between weight and
mass?

Answers

Answer: An object with twice the mass of another object will weigh twice as much is the statement accurately describes the relationship between mass and weight.

Hope it helps you if not sorry

Explanation: A.Mass is an objects weight multiplied by the amount of gravitational force acting upon the object

A darkly staining region that may appear within the nucleus on an electron micrograph is called a(n) ______. This is the location of rRNA production.

Answers

Answer:

the answer is nucleolus.

Explanation:

the production of ribosomes makes it dark or stained

Apakah hubungan antara keamatan cahaya dengan kadar transpirasi?

Answers

Answer:

Kadar transpirasi meningkat apabila keamatan cahaya meningkat .

A species in imminent danger of extinction throughout all or a significant portion of its range is said to be:

Answers

Answer: Endangered

The question above is the definition of "endangered": A species that is in imminent danger of extinction throughout all or a significant portion of its range.

How many kingdoms are in the modern system of classification?

Answers

Answer:

There are 6 kingdoms

Explanation:

According to the modern classification there are six kingdoms a these include kingfom archaebacteria, eubacteria, protista, fungi, Monera, plantae and animalia

2. Many microscopic organisms are clear, making them almost impossible to see under a microscope.
What can be done to a sample to make it easier to see?

Answers

Use iodine.

Iodine solution makes the sample you want to study of microscopic organism more visible.

Give one reason why structure f(petal) is brightly colored in the diagram?

Answers

Answer:

petals are colorful because the color attracts birds, bees and other insects. The insects land in the flower and spread pollen, which helps fertilize the flowers and create seeds. Some flowers change color as they grow older.

what is the name given to the male cell in the flower​

Answers

Answer:

The name given to the male cell in the flower is called stamens and usually surrounds the pistil.

Explanation:

Hope this helps.

A system of farming that leads to continuous destruction of virgin forest is
A. mixed farming
B. mixed cropping
C. pastoral farming
D. shifting farming

Answers

Answer:

shifting farming

Explanation:

this process of farming doesn't allow the forest regenerate ergo destroys it ..

How are meiosis and mitosis similar?

Answers

Answer:

both processes of cell division in which cells reproduce

they share similar steps (prophase, metaphase, anaphase, telephase, cytokinesis) (meiosis has a second division but still follows the same steps)

Answer:

Meiosis II is very similar to mitosis; chromatids are separated into separate nuclei. As in mitosis, it is spindle fibers that “pull” the chromosomes and chromatids apart. The end result of meiosis is four cells, each with one complete set of chromosomes instead of two sets of chromosomes.

Explanation:

Hope this helps

It takes about [?] hours for food to be
ingested, digested, and leave the small
intestine.
A. 8
B. 1-2
C. 24
D. 5.

Answers

Answer:

A 6 to 8 hours. After you eat it takes about 6 to 8 hours for food to pass through your stomach and small intestine.

any four different between ecology and ecosystem? please help me to do this.​

Answers

Explanation:

Ecology is the study of the relationship between living organisms and their environment. An ecosystem is a place, such as a rotting log, a forest, or even a schoolyard, where interactions between living and non-living things occur.

Answer:

Ecology is the study of the relationship between living organisms and their environment. An ecosystem is a place, such as a rotting log, a forest, or even a schoolyard, where interactions between living and non-living things occur.

Two views of a kidney. Which level of organization is shown in the diagram? organ ,tissue, organ system, cell

Answers

Answer:

tissue

Explanation:

its tissue

Answer:

b. tissue

Explanation:

edge 2021

Pure liquid water has a pH of 7, which means that water is

Answers

Answer:

Pure liquid water has a pH of 7 it means pure water is neutral.

fungsi vakuol mengecut dalam paramecium​

Answers

Hiiiiiiiiiiiiiiiiiiii

White blood cells (WBCs) are more resistant to lysis than red blood cells (RBCs). When looking at a sample of blood for WBCs, what could you do to reduce interference from RBCs? Group of answer choices Mix the blood in a hypotonic solution, which will cause the RBCs to lyse. Mix the blood in a hypertonic solution, which will cause the RBCs to lyse. Mix the blood in a salty solution to cause the RBCs to lyse. Mix the blood in an isotonic solution and allow the WBCs to float to the top.

Answers

Answer:

The correct option is this: MIX THE BLOOD IN A HYPOTONIC SOLUTION WHICH WILL CAUSE THE RED BLOOD CELL TO LYSE.

In order to reduce interference from red blood cell, mix the blood sample with a hypotonic solution. Because the red blood cells has more solute concentration, water from the hypotonic solution will enter into its cells and with time the cells will burst since they do not have much resistance against lysis. The bursting of the cells will eliminate the red blood cells and leave you with white blood cell to work with.

Como es el sistema respiratorio de la vaca?

Answers

Answer:

Explanation:

jjjjjjjjjjjjjjjjjjjjjjjjjjjjjs4r44444

Which of the following is NOT true of
autotrophic protists?
A. these organisms can start food chains as producers
B. examples are like phytoplankton, dinoflagellates, and euglena
C. they feed off of other organisms

Answers

Answer:

C. they feed off of other organisms

Explanation:

Autographs, as the word auto suggests (auto : self) , produce their own food. So they wont feed on other organisms for their survival.

Therefore, option C is incorrect and since we have to find the incorrect option that is the answer.

Answer: C. they feed off of other organisms

Explanation:

Draw a Punnett Square to show Queen Victoria and her husband Albert. Queen Victoria’s genotype will be XX^H and Albert will be XY. X^H indicates the female sex chromosome carrying the gene for hemophilia.

Answers

Explanation:

XY XX^H

XX^H XX^H XY XX^H XX^H

XY XY XY XY XX^H

all the royal families in Europe were related

that must mean 1 family ruled all of europe

The family pedigree of  Queen Victoria shows a number of hemophilic descendants. Because hemophilia is recessive disorder and Queen Victoria was a carrier. X-linked recessive disease most often occurs in males because Males have only one X chromosome.

XY XX^H

XX^H XX^H XY XX^H XX^H

XY XY XY XY XX^H

Which chromosome will cause the disease?

A single recessive gene on that X chromosome will cause the disease. Females have two X chromosomes so they can act as carriers for the disease.

What is hemophilia?

Hemophilia is a bleeding disorder that slows the blood clotting process.Hemophilia is x-linked recessive disorder

So, Queen Victoria was a carrier.

learn more about chromosomes below,

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In 40 words or fewer, why do you think a 0.1% difference in DNA can
be useful to society?

(The answer is this ⬇️)


The 0.1% difference in DNA
can be used to identify
someone who has
committed a crime or free
someone who hasn't, to determine someone's family
heritage, and to help give a
person more precise
medical treatments.

To anyone who needs it

Answers

Answer:

The 0.1% difference in DNA

can be used to identify

someone who has

committed a crime or free

someone who hasn't, to determine someone's family

heritage, and to help give a

person more precise

medical treatments.

Explanation:

Easy points thxx

Which statement describes an element? Check all that apply.Which statement describes an element? Check all that apply.
An element is a pure substance that cannot be broken down into a simpler form.

An element is made of two or more atoms that are chemically combined.

All elements are listed on the periodic table of elements.

An element symbol begins with a capital letter; if there is a second or even third letter, it is a lowercase letter.

Answers

Answer:

- An element is a pure substance that cannot be broken down into a simpler form.

- All elements are listed on the periodic table of elements.

- An element symbol begins with a capital letter; if there is a second or even third letter, it is a lowercase letter

Explanation:

An element is one of the two types of pure substances i.e. substances that cannot be broken down into simpler forms. Elements are made up of only one type of atom e.g. Fe, Cl2 (two chlorine atoms).

All known or discovered chemical elements are represented on the periodic table. In an order of increasing atomic number, elements are arranged from left to right on the periodic table.

The symbol of an element begins with a first letter written in capital letters while the subsequent letters can be written in lower cases. For example, Fe, Cu, Hg, Zn etc.

Mutualism is a symbiotic relationship
where...
A. both organism gain from the interaction.
B. one organism gains but the other is unaffected.
C. one organism gains but the other is harmed.

Answers

The correct answer is A

Answer:

A. both organism gain from the interaction.

Explanation:

mutualism meaning both parties profit.

The scientific method is the process that scientists use to find out new information. It involves a question, a hypothesis, a prediction, collecting data, and analyzing that data to make a conclusion. How would you use the scientific method to answer this question: Do mice live longer when they are fed high-sugar diets? (15 points)

Answers

Answer:

Science deals with emperical to finding solutions to problem

Explanation:

This research should be subject to case study. You will select two groups of mice. One group with high feed of sugar diet and second group with a minimum diet of sugar. You will study the two groups in order to know which one lives longer

Propuso la teoría catastrofista, según la cual habían sucedido varios episodios de extinción, debidos a grandes cataclismos, seguidos siempre de nuevos periodos de creación

Answers

Answer:

Georges Cuvier.

Explanation:

Georges Cuvier (1769-1832) fue un zoólogo quien propuso que la evolución era el resultado de extinciones producidas por catástrofes a las cuales les sucedían nuevas creaciones con distintas especies. Los ecosistemas con las catástrofes eran destrozados y en los suelos de estos quedaban los  restos de los animales extintos formando parte de los estratos de la tierra.

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