Which chemical is a compound ?
A. Hydrogen
B. Helium
C. Nitrogen
D. Hydrochloric acid

Answers

Answer 1

Answer:

It is D

Explanation:

All A,B, and C are a element so D.

Answer 2
The answer is D, Hydrochloric acid.


-Hydrogen (H), a colourless, odourless, tasteless, flammable gaseous substance that is the simplest member of the family of chemical elements.
- Helium is a chemical element with symbol He and atomic number 2.
-Nitrogen is an element, not a compound. It is found in nature as nitrogen gas, also called dinitrogen, with the chemical formula N2 , and makes up 78% of the atmosphere.

Related Questions

Is mitosis essential to life?

Answers

Answer:

Yes

Explanation:

in order for you to fully function and stay alive the cells need to be replaced. mitosis is the reason we can grow, heal wounds, replace damaged body parts and cells. It also helps with organisms that reproduce.

1. A disease vector is a(n)
A) organism that transmits a disease
B) symptom of a disease
C) environmental condition associate with a disease​

Answers

Answer:

the answer is A

Explanation:

*
Homologous chromosomes are pairs of chromosomes with

Answers

Answer:

Identical genes

Explanation:

Which is the largest organ?

sartorius
skin
hair
gluteus maximus

Science. The gluteus is the butt muscles

Answers

Answer:

Skin is the largest organ

Answer:

skin

Explanation:

skin is the largest organ in the body.

the first filipino olympic medalist​

Answers

Swimmer Teófilo Yldefonso, who finished the 200 meter breaststroke event.

how does insulin travel around the body?

Answers

Answer:

In nerve cells

Explanation:

It flows in the blood stream

What is the function of the surface protein on the influenza virus?
A To protect
B To attach to a host cell
C To manufacture enzymes using a host's immune system
D To remove a host cells's DNA

Answers

Surface proteins are the proteins that are embedded in the cell membrane structure of organisms and help in cell interaction with the outer surrounding or other cells.

Surface protein on the influenza virus is needed for attaching to the host cell.

The surface protein of viruses can be explained as:

In viruses, the genetic material is stored in these protein structures called capsids which protects the viral genetic material from degrading enzymes and other cellular enzymatic activities.

Surface proteins on the viruses are needed to penetrate and attach to the host system and cells for inducing immune response and diseases.

The surface proteins of influenza virus HA and NA are necessary for penetrating host mucus layers.

Therefore, option B to attach to the host cell the surface proteins are needed.

Learn more about surface proteins here:

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Answer:

B to attach to a host cell

Explanation:

Which type of bacteria is used to make cheese, sauerkraut and
fruit juices?

Answers

Answer:

the type of bacterias to make cheese is lactobacillus, lactococcus, and streptococcus.

Lactococcus for Cheese and penicillium for juice

please solve question 6​

Answers

I am pretty sure number 4 is your answer

The best determination of a community’s quality of life is _______.

Answers

The energy used per capita

A patient has swollen feet, ankles, and legs, and has pain in his lower back. Tests show the level of urea, a waste product, in the patient's blood has suddenly risen. Which body system is most likely not functioning properly?

A.
Nervous
B.
Excretory
C.
Digestive
D.
Reproductive

Answers

The answer is B. Excretory

The body system that is most likely not functioning properly is excretory system. The correct option is B.

What is excretory system?

The excretory system is a detached biological mechanism that removes excess, unneeded materials from an organism's body fluids to help maintain internal chemical homeostasis as well as prevent body damage.

The excretory system's function is to remove waste from the body. Water, CO2, nitrogen, salts, and heat are among the wastes. Metabolism refers to the process by which the body converts food into energy.

The primary function of the kidneys is to eliminate excess water and wastes from the bloodstream through the production of urine, a liquid waste.

As the patient has swollen feet, ankles and legs and having urea level boosted in blood, it means his excretory system has some problems.

Thus, the correct option is B.

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QOD: have you downloaded Ecosia yet? why not? do it. n o w.

Answers

Answer:

What's Ecosia?

Explanation:

What stage of photosynthesis uses
carbon dioxide to make glucose?


A. Light reactions
B. Calvin Cycle
C. ATP synthesis
D. Cellular respiration

Answers

Answer:

Calvin Cycle

Explanation:

The Calvin cycle takes over where the light reactions end. It uses chemical energy stored in ATP and NADPH (from the light reactions) and carbon dioxide from the air to produce glucose, the molecule that virtually all organisms use for food.

How did the temperature relate to the “recommended temperature limit” (solid horizontal red line)?

Someone please just explain this question

Answers

Answer:

The “recommended temperature limit” indicates limit of the temperature that is good for our world.

Explanation:

The temperature related to the “recommended temperature limit” means that in the graph there is a limit of temperature for our world's environment. if the temperature is between this limit, there is less or no adverse effect on our environment while on the hand, if the temperature exceeds from this limit, then it adversely affected our world because the concentration of carbondioxide gas in the atmosphere increases due to this increase temperature..


1. What is biodiversity?
a) The animals that live only in rain forests.
b) The rich variety of live organisms in every
ecosystem on Earth.
c) The animals and plants species that live
only in your backyard.

2. Why do we need biodiversity?
a) it provides us with the food we need to eat
b)it provides us with virtually all the things we need to stay alive
c)so we have plenty of trees to use for fuels and materials

3.which of the following places has the highest biodiversity?
a)madagascar &indian ocean islands
b)tropical andes
c)caribbean islands

4. how many biodiversity ‘hotspots’ are there in the world?
a)12
b)25
c)34

5. in these ‘hotspots’ how much of the worlds species are found there?
a)10%
b)25%
c)50%


6. what does ‘endemic’ mean?
a) when a lot of people fall ill
b) when something is only found in one place
c) when a disease spreads throughout the world

7. why is biodiversity under threat?
a) habitat destruction
b)introduction of exotic species
c) both of the above and more


8. what can you do to help save biodiversity?
a) reduce, reuse, recycle
b) plant trees, clean local rivers and parks and protect habitats
c) all of the above

Answers

Answer:

1.B

2.B

3.A

4.A

5.C

6.C

7.C

8.C

1.B 2.B 3.A 4.A 5.C 6.C 7.C 8.C

Scientist describe the motion of an object in relation to another_______

Answers

Answer:

phenomenon

Explanation:

phenomenon

Mitosis leads to which of the following?

A. Eggs or sperm
B. No diversity in the offspring
C. Four daughter cells
D. Cells with 23 chromosomes

Answers

Answer: It leads to 4 daughter cells.

I hope this helps.

One side of a DNA molecule has the following sequence of nitrogen bases GGTACTTACGCA. What would be the complementary side’s bases? How many amino acids would that sequence code for?

Answers

Answer:  The arrangement of these nitrogen bases contains the code for

genetic traits. These bases are arranged in a particular

sequence, such as TGCATTCA. The sequences of DNA can vary

from several hundred bases to a million or more bases.

Explanation: put this and my teacher said amazing  

The complementary side’s bases if one side of a DNA molecule has the following sequence of nitrogen bases GGTACTTACGCA are: CCTGAAATGCGT.

What is the complementary sequence?

Thus, the complementary nitrogen base sequence of GGTACTTACGCA is CCTGAAATGCGT. It is because the complementary nitrogen bases pair up: A always pairs with T, and C always pairs with G.

The sequence codes for 4 amino acids. Every three nitrogen bases code for one amino acid. So, since there are 12 nitrogen bases, the sequence codes for 12/3 = 4 amino acids.

To determine the number of amino acids coded by this sequence, first note that a codon consists of three nucleotide bases, and each codon corresponds to one amino acid. The sequence has 12 bases, so there are 4 codons: GGT, ACT, TAC, and GCA. Since each codon codes for one amino acid, this sequence would code for 4 amino acids.

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A benefit of GMO is that...?
A) they are creating super bugs
B) they are producing more crops
C) there is not enough research
D) there are changing natural ecology​

Answers

Answer:

B) They are producing more crops

Explanation:

GMOs are designed to increase crop productivity because of supply and demand, which in turn makes the supplier more money, and more happy people/companies that buy the crop. Additionally, the other answer choices would be considered bad traits.

what is the car's acceleration from 0 to 1 second

Answers

Answer:

What do you mean?

Explanation:

HELP ME PLEASE ITS DUE IN TODAY

Answers

Answer:

The Male has the dominant genes and the female has weak genes.

Well I’ll say that the man has more powerful and strongest genes but the females are a lil weaker and less powerful

1. The line "... form a more perfect
Union" can be seen as a reference
to what document?
O Bill of Rights
O Ten Commandments
0 Article of Confederation
O Declaration of Independence

Answers

The bill of right if am wrong I am so so sorry.

Answer:article of confederation

Explanation:

Because I’m smart

why are fossil fuels supplies limited​

Answers

they are limited because many fossil fuels must be refined before being used. Years ago, when prehistoric animals and plants died, layers of rock and dirt gradually buried them. ... Other resources, like fossil fuels, are called nonrenewable, which means they have a limited supply and are not continuously being made or they are made very slowly

Answer: The coal, oil and natural gas we are consuming now are the remnants of plants, trees and animals that were living hundreds of millions of years ago. There is no way to replace them, as conditions on Earth are much different now.

Explanation: Mines and wells are being depleted much faster than they were a hundred years ago when demand was much less-- fewer people, fewer cars, fewer planes. . . and people believed there was an endless supply. Many of those mines and oil wells are now empty.

Will give brainliest!
Describe at least two of the four major systems we looked at in class: Ice, Water, Land, Atmosphere and
provide a specific example of how these systems are connected to one another

Answers

Land, water and atmosphere are very popular choices for habitats. Land is use full with all the food and prey walking around many places to hide. Birds can transition. in the atmosphere you can see very far and can find prey easily. water has lots of life and lots of nutrients. these three habitats have lots of interaction by prey and predator relationships.

hope this helps.

Explain how DNA results in the expression of a gene using the following words: DNA, mRNA, tRNA, gene, transcription, and translation

Answers

Explanation:

in order for a gene to even be transcribed, it must be "turned on" or "expressed" meaning the nucleotides have moved away from each other. after it's expressed, the gene will unwrap and continue on with transcription, and make mRNA copy of a DNA strand. once RNA is made it will leave nucleus and enter cytoplasm to find a ribosome. once it attaches to ribosome, translation begins, and a tRNA will bind to anti-codon, and the building of a polypeptide/protein will begin.

plz help. how did Darwin almost ruin the data he had for his Galapagos finches?​

Answers

Answer:

by nearly dropping the book in the ocean

Which represents solar energy?

Answers

Answer:

A I guess... :D

The ice cubes represents the solar energy.

What is Solar energy?

Solar energy is the radiant heat and light from the Sun that is captured by a variety of technologies, including solar architecture, solar thermal energy (including solar water heating), and solar power to produce electricity.

It is a crucial source of renewable energy, and depending on how solar energy is captured, distributed, or transformed into solar power, its technologies are often classified as passive solar or active solar. Utilizing photovoltaic systems, concentrated solar electricity.

A building's orientation toward the Sun, the use of materials with favorable thermal mass or light-dispersing qualities, and the creation of naturally ventilated rooms are all examples of passive solar approaches.

Therefore, The ice cubes represents the solar energy.

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While studying for a test, Tyrone created some note cards. What would be an appropriate title for the note
card above?
A product of photosynthesis.

A reactant of photosynthesis

Parts of a plant cell.

Organelles that capture sunlight.

Answers

A because that’s the final products of photosynthesis

The shadow of a tower is always directed toward the North at midday, as shown in the given figure. Where is the
tower located?
A)
North of the Tropic of Cancer or 23°N line
B)
Between the Tropic of Cancer and the Equator
South of the Tropic of Capricorn or 23°S line
D)
Between the Tropic of Capricorn and the Equator

Answers

I got c My teacher said I was Right I don’t know if it’s right for you

Answer:

A

Explanation:

Every part of your DNA codes for proteins.
1. True
2. False

Answers

The portion of the genome that codes for a protein or an RNA is referred to as a gene. Those genes that code for proteins are composed of tri-nucleotide units called codons, each coding for a single amino acid. False

Its FALSEEEEEEEEEEEE!!!!!

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