which gas is not abundant in earth's atmosphere?
a. oxygen
b. hydrogen
c. nitrogen
d. argon

Answers

Answer 1

Answer:

Its letter D

Explanation:

Answer 2

Answer:

argon is not adudabt in earth atmosphere


Related Questions

When we place a teabag in hot water, the water takes on a brownish colour. Explain which process has taken place.

Answers

Answer:

diffusion

Explanation:

the particles form the tea are moving from an area of high concentration of tea to a low concentration of tea. If you want to be even more speficic this is osmosis; the diuffuion of partcles in water

hope this helps :)

today's midterms and I just want to say good luck to you all. (we're doomed)

Answers

Answer:

lol, good luck dude ur gonna need it.

Guys help!!!!!!!!!! Pleaseeee it’s urgent

Answers

Answer:

The answer is b

Explanation:

Make list of farm tool used in:

Land preparation
Cultivation
Plant propagation
Harvesting

Answers

Answer:

Land preparation:

This has to do with preparing the land in preparation for planting.

Farm tools used in land preparation include scrapers, ditchers, ploughs, levelers.

Cultivation:

This has to do with loosening the soil for farm use.

Farm tools used in Cultivation include: spade, shovel, rake, etc.

Plant propagation:

This is the act of growing new seeds, using different sources.

Examples of farm tools used in this operation include: propagation knife, hand pruner, sharpening stone, etc

Harvesting:

This is the process of collecting or gathering crops which were planted and have reached age of maturity.

Examples of farm tools used in this operation are hand sickle, darat, gandasa, etc.

The list of farm tools used for various uses include the following:

Land preparation-This involves preparing the land for planting. Examples of farm tools used include tractor, harrows, plough, levelers etc

Cultivation- This involves the process of preparing the soil for planting and crop cultivation. Examples of farm tools used in cultivation include spade, shovel, rake, etc.

Plant propagation- This involves different techniques which are used to grow crops using stems or leaves of plants. Examples of farm tools used include propagation knife, hand pruner, sharpening stone, etc

Harvesting- This involves the process of gathering planted crops which have reached maturity and ready for consumption and other uses. Examples of farm tools used include hand sickle, darat, gandasa, etc.

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1.
How does water behave when it freezes?

Answers

Answer:

During freezing, water molecules lose energy and do not vibrate or move around as vigorously. This allows more stable hydrogen-bonds to form between water molecules, as there is less energy to break the bonds...Thus water expands as it freezes, and ice floats atop water.

Explanation:

please help me lol . it’s easy but i’m rlly lazy :) tysm i’ll mark u blainlist ik it’s a lot of work !!

Answers

Answer:

this must be 8th grade work am I correct?

Explanation:

How does evolution explain the similar legs in mammals and explain why the function differently?

Answers

Answer/Explanation:

These are examples of homologous structures. These are derived from common ancestors , however, they do not necessarily perform the same function. A good example is the vertebrate forelimbs like the ones shown here.

These limbs all have the same basic pattern of bones. They inherited this pattern from a common ancestor, but they now have different functions. This is an example of divergent evolution

PLS HELP!!

WHAT is the meaning of biology? how does chemistry and biology related???

Answers

Answer:

Biology is the study of living things.

Chemistry is the study of elements and their properties, reactions, bonds...

Explanation:

What describes G and why they face the watery inside and outside of the cell

Answers

Answer:

Because they are hydrophilic

Explanation:

The cell membrane is made up of a phospholipid bilayer. The phospholipid bilayer is made up of an arrangement of phosphate heads, which are (attracted to water) hydrophilic, and fatty acid tails, which are hydrophobic. (repelled by water).

Because they are attracted to water, the phosphate heads face the outside of the cell, where the water is

how has limiting factors for the ecosystem impacted pythons in the everglades

Answers

Answer:

Explanation:

Non-native Burmese pythons have established a breeding population in South Florida and are one of the most concerning invasive species in Everglades National Park. Pythons compete with native wildlife for food, which includes mammals, birds, and other reptiles. Severe mammal declines in Everglades National Park have been linked to Burmese pythons.

The most severe declines in native species have occurred in the remote southernmost regions of Everglades National Park, where pythons have been established the longest. In a 2012 study, populations of raccoons had dropped 99.3 percent, opossums 98.9 percent, and bobcats 87.5 percent since 1997. Marsh rabbits, cottontail rabbits, and foxes effectively disappeared.

The mammals that have declined most significantly have been regularly found in the stomachs of Burmese Pythons removed from Everglades National Park and elsewhere in Florida. Raccoons and opossums often forage for food near the water’s edge, which is a habitat frequented by pythons in search of prey.

what is ostia in biology​

Answers

Answer:

An ostium (plural ostia) in anatomy is a small opening or orifice.

Explanation:

Simple term for explaining an opening

Origin: L. (Science: anatomy) An opening; a passage. An opening in organic sponges that allow water to enter the organism. (hope this helps you)

Role of Lipids and Carbohydrates - Type Lipid or Carbohydrate behind each question. 16. Provide long term energy storage. 17. Provide insulation and protection. 18. Short term energy supply 19. Composes cellulose in trees and plants. 20. Main component of cell membranes 21. Provide a waterproof coating on leaves and feathers. 22. Composes chitin exoskeleton of insects. 23. Act as chemical messengers in the body.

Answers

Answer:

16. Carbohydrates  

17. Lipids

18. Carbohydrates

19. Carbohydrates

20. Lipids

21. Lipids

22. Carbohydrates

23. Lipids

Explanation:

Carbohydrates are organic molecules composed of carbon, hydrogen and oxygen. Carbohydrates can be classified into three types: monosaccharides (e.g. glucose), disaccharides (e.g., lactose), and polysaccharides (e.g., starch). Cellulose is a carbohydrate where many glucose rings chain together, while chitin is a polysaccharide consisting of chains of modified glucose molecules.

Lipids represent a diverse group of organic molecules that include, among others, fats, waxes, oils, hormones, etc. Lipids play a role by insulating (and protecting) the body. For example, there is a layer of fats beneath the skin which enables to maintain body temperature relatively constant. In animals, lipids constitute about 50% of the mass of cell membranes. These membrane lipids are mainly phospholipids, glycolipids and cholesterol. There are hormones that derive from lipids such as steroid hormones, which derive from cholesterol. Some examples of steroid hormones are testosterone, estrogen and cortisol.


Diffusion is the movement of molecules from an area of high concentration of molecules to an area with a ____ concentration.

A. Equal
B. Higher
C. Lower
D. None of the above

Answers

Answer:

lower

Explanation:

Diffusion is the movement of molecules from an area of high concentration to an area of lower concentration. So, the correct option is C.

What is diffusion?

Diffusion is a type of passive transport, this means that it does not require any kind of external energy for movement of molecules. The difference in concentration in two areas gives rise to a concentration gradient. Where, in one area there is high concentration of molecules and in another, there is low concentration of molecules.

If the molecules move from an area of higher concentration to an area of lower concentration, they are moving along the direction of concentration gradient. This is why no additional energy is required. Diffusion is a type of passive transport where molecules move along a concentration gradient.

This is in contrast to active transport where molecules move against the concentration gradient and therefore require external energy.

Therefore the correct option is C.

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Vhy did the color of the peppered moth change?
A.The moths' life cycle changed,
B.The environment changed
C.The amount of variation in the moth population changed
D.The number of individual moths in the population changed,

Answers

Answer:

the environment changed

Explanation:

The evolution of the peppered moth is an evolutionary instance of directional colour change in the moth population as a consequence of air pollution during the Industrial Revolution. ... Later, when pollution was reduced, the light-coloured form again predominated.

Answer:

B.The environment changed

Explanation:

A model of an embedded membrane protein is shown above. What is the most likely characteristic of the portion of the protein
indicated by the black circle?
A)
This is a charged region of the protein
B)
This is the polar region of the protein
This is hydrophilic region of the protein
D)
This is the nonpolar region of the protein
Then

Answers

Answer:

D) This is the nonpolar region of the protein

Explanation:

cause i just got it right

When a biological vector is used, which process is used to ensure there are large amounts of DNA?

Answers

Answer:

Cloning

Explanation:

It makes the most sence

Answer:

cloning

Explanation:

i looked it up

have a great day!

Place a checkmark next to each cellular component necessary to build a bacterial cell:
plasma membrane
cell wall
DNA
nucleus
mitochondria
chloroplast
Golgi apparatus
rouch endoplasmic reticulum
smooth endoplasmic reticulum
flagella

Answers

Answer: Cell wall, DNA,  plasma membrane

Explanation:

Please mark as brainliest if your want!

The cellular component necessary to build a bacterial cell include:

Cell membraneDNACell wallRibosomesCytoplasmFlagella

What is Bacteria?

These are micro-organisms which can't be seen with the eyes but with the use of instruments such as microscope.

They lack a nucleus and their DNA is usually found in the nucleoid region of the cell.

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ASAP PLEASE!

Stomata are tiny openings found in plant leaves. Specialized cells known as guard cells surround the stomata and open and close the openings. When it is very hot, plants may close their stomata to prevent water loss. When plants close their stomata, what else is affected?
Group of answer choices

Plants cannot take in water from the air.

Plants cannot release glucose made in photosynthesis.

Plants cannot take in the carbon dioxide they need for photosynthesis.

Plants cannot take in the sunlight they need for photosynthesis.

Answers

Answer:

Plants cannot take in the carbon dioxide they need for photosynthesis.

i did the same exact question (As you can see) and it even says correct. theres the proof.


6.which of the following is NOT a main part of the cell?
A cell membrane
B. cytoplasm
C. nucleus
D. ribosome

Answers

Explanation:

Its answer is ribosome

A mother and daughter are both talented pianist. Give an inherited trait and learned trait would lead to this similarity

Answers

Answer:

long fingers or slim hands i think would make sense for inherited trait and learned trait would be the mother teaching the daughter how to play piano

Mendeleev developed his table when he placed the elements
in order by increasing atomic number.
TRUE
FALSE

Answers

The answer to this is true

the answer is True

okay

where do cells store waste

Answers

Answer:

Vacuoles

Explanation:

Which of the following adaptations enables deciduous trees to produce more food?
a.
thick bark
b.
stretching toward the sun
c.
leaf loss
d.
color change


im pretty sure its b, but im just making sure

Answers

Answer:

yes you are correct the answer would be "B"

Explanation:

i think it’s b stretching toward the sun

PLLLLLLLLLLLLLLLLLLLLLLLLLLLLSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS HELP!
DUE RIGHT NOW
You know we have a ‘leap year’ every 4 years in February right? Make a guess- do you think these dates are exactly the same every year? *Explain completely*

Answers

These dates are not EXACTLY the same every year because each year starts off at a different day of the week, therefore, affecting the day February 29 will land on. This day is added to the calendar as a corrective measure since the Earth does not orbit the sun in precisely 365 days.

HELP ME PLS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Compare the data shown in the table. What reasonable conclusion can be made from the information given?

Answers

I’m not sure but I think that and answer is C...hope that helped

Should blue crab fishing in the Chesapeake Bay be banned?

Answers

(This is most likely an opinionated question but this is what I would say)

Blue crabs get their name from their blue-tinted claws and are very popular type of crab. Many people harvest these crabs for meat. The number of blue crabs has decreased in the Chesapeake Bay because of over- harvesting and changes to their habitat. (Then explain if you think it should be banned after knowing this information) if you don’t think it should be banned then you could talk about regulations and licensing for crab fishing, or if you think it should be banned you could explain the effects of habitat loss on the crabs.

You're eating a bowl of
fruit but you're starting to
feel full.

Answers

Answer:because it has low energy density an lots of fiber it helps you feel full  longer

Explanation: fruit recommended

In the test for protein, why would some tubes show a slight purple color while others show a dark purple color?

Answers

Answer:

protein:

1. What is the name of the reagent used to test for the presence of proteins? (1 point)

           Biuret reagent  

2. What color indicates the presence of protein in a solution when the reagent is added? (1 point)  

When Biuret is added, it would turn blue when it is negative but if it is positive then it would turn to a purplish to a dark purple. Showing that there is protein.

                   

3. Which substances tested were positive for protein? (2 points)

The ones that were tested positive were milk solution and 50% egg solution.

4. Describe in your own words what we should do if the test tube for di-water tested positive for protein. (2 points)

Since Di water is our negative control, we know that there would be no proteins but if it was tested positive. Then we should start the experiment all over again this time with new, clean equipment.

What groups of organisms are most in danger of extinction?

A. Those with small population
B. Those that migrate or need special habitats
C. Those with large populations that breed quickly
D. Both a and b

Answers

Explanation:

D.Both a and B

As organisms with small population and those who migrate and need special habitat are most in danger of extinction.

The group of organisms that are in danger of extinction is those that have small populations and those that migrate or need special habits. So the correct option is D.

What is the extinction of species?

In biology, extinction refers to the extinction or death of a species. Extinction happens when a species' numbers are reduced due to evolutionary changes in its members, such as genetic inbreeding, poor reproduction, and population decline, or due to environmental factors like habitat fragmentation, climate change, natural disasters, and overexploitation of the species for human use.

The majority of species that have ever existed on Earth have gone extinct, but the fossil record indicates five very significant extinctions, known as mass extinction events, each of which resulted in the extinction of enormous numbers of species. The bulk of extinctions, which happen continuously and are described as background extinctions, are separated from these glaring decreases in the variety by the term "mass extinction."

Therefore, the correct option is D.

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How many membrane layers cover the nucleus?

Answers

Answer:

2 membrane layers cover up the nucleus

Answer:

two lipid bilayer

Explanation:

the nucleus membrane is made up of two lipid bilayer

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