The substance that are present before any chemical reaction are called

Dioxides
Oxygen
Products
Reactants

HELP ASAP

Answers

Answer 1
Reactants. Reactants are the substances that are needed for a chemical reaction to occur. Without reactants there are no products.

Related Questions

do heterotrophs perform photosynthesis

Answers

Answer:

I think the answer would be No my bad of I'm wrong

No, they can’t perform photosynthesis.

Select the correct image. Which cell is the most specialized?

Answers

Answer:

no pics

Explanation:

Answer:

Where is the image?

Explanation:

Which is an example of carbon accumulating in the geosphere?
Select one:

Formation of fossil fuels from remains of dead organisms.

Breaking down the body of a dead organism and producing carbon dioxide gas.

Formation of glucose in plants through photosynthesis.

Breaking down glucose in cells through cellular respiration.

Answers

Explanation:

it will option A hope it helps

A salt solution turning cold as the salt dissolves *

A. Change in color
B. Temperature change
C. Light production

Answers

Answer:

I'm not sure but I think it's B

A.
ionic compounds/ salts are always white in color when in powder/solid form , so when dissolved in water, they turn from white to colorless. Hope this helps

Correctly complete the statement with the appropriate term.
Eutrophication is a dangerous process for
animals because it depletes the ecosystem
of oxygen.

Answers

Answer: Aquatic

Explanation:

Answer:

Explanation:

aquatic

A cross between 2 phenotypically 'wild-type' individuals produces 9 wild type offspring for every 3 of one mutant phenotype and 4 of another mutant phenotype. What is the likeliest explanation for this?

Answers

Answer:

Recessive epistasis Interaction

Explanation:

Due to technical problems, you will find the complete explanation in the attached files

-END-
SENIOR THREE BIOLOGY CHRISTMAS DOSAGE
1.(a) (i) Explain why small organisms such as this amoeba can obtain sufficient oxygen for respiration without a
specialized gas-exchange system.?
fi)explain why the method of gas exchange in (a)i above is only possible in very small organisms.?​

Answers

Answer:

In single celled organisms surface area to volume ratio is optimum for diffusion/exchange of substances between the cell and its exterior and this rate of exchange suffices the requirement of a unicellular organism. However, in multicellular organisms the surface area to volume ratio is low,  the exchange that takes place with the exterior or the environment occurs only through the body surface with the help of a specific structure/organ, example (Skin),However, this exchange does not compensate for millions of cells in a multicellular organism, which have distinct requirements based on their function

Explanation:

i) Amoeba gets oxygen gas dissolved in surrounding water through its plasma membrane by the process of diffusion.

ii)The oxygen gas diffused inside the body is used up by amoeba. carbon dioxide gas is also liberated in the surrounding water through the same process of diffusion.

What 3 types of science formed the geological time scale?


A. Archaeology, paleontology, astrology
B. Scientology, astronomy, geology
C. Geology, archaeology, paleontology
D. Paleontology, Scientology, biology

Answers

Answer:

I believe the answer is C.

Explanation:

Please help me with this

Answers

1st-B
2nd-a
3rd-D
Hope that helped

why is it important to consider all three levels of biodiversity rather than just one

Answers

Answer:

Biodiversity boosts ecosystem productivity where each species, no matter how small, all have an important role to play. For example, A larger number of plant species means a greater variety of crops. Greater species diversity ensures natural sustainability for all life forms.

Explanation:

Answer:

It is important to consider all three levels of biodiversity rather than just one because:

Explanation:

It is important to consider all three levels of biodiversity rather than just one because Biodiversity improves the productivity of habitats where each species, no matter how limited, has an essential role to play. For ex. a greater number of plant species means a greater range of crops. Greater species diversity assures the ecological survival of all life forms.

What does each letter stand for in Einstein’s equation, E=mc2?

State in words what Einstein’s equation represents.

Explain why Einstein’s equation is so important.

How does Einstein’s equation relate to the energy produced in nuclear reactions?

Answers

Answer:

hope this helps, im sorry if it dosent

Explanation:

1-

An equation derived by the twentieth-century physicist Albert Einstein, in which E represents units of energy, m represents units of mass, and c2 is the speed of light squared, or multiplied by itself.

2-

The equation — E = mc2 — means "energy equals mass times the speed of light squared." It shows that energy (E) and mass (m) are interchangeable; they are different forms of the same thing. If the mass is somehow totally converted into energy, it also shows how much energy would reside inside that mass: quite a lot.

3-

Einstein's greatest equation, E = mc2, is a triumph of the power and simplicity of fundamental physics. Matter has an inherent amount of energy to it, mass can be converted (under the right conditions) to pure energy, and energy can be used to create massive objects that did not exist previously

4-

The change in mass is related to the change in energy according to Einstein's equation: ΔE = (Δm)c2. ... The energy corresponding to the mass defect is the nuclear binding energy, the amount of energy released when a nucleus forms from its component particles.


DNA's shape is similar to what basic structure?

Answers

Answer:

a helix!

Explanation:

you can also call it a double helix

Which of the following is/are characteristics shared by most animals?

Asexual reproduction

Heterotrophic eukaryotes

All have radial symmetry

All have DNA outside of the nucleus

Answers

pretty sure it’s heterotrophic eukaryote

pls help me nowwwwwwww:( plssssssssssss

Answers

Answer:

I want to say B. It replicates the DNA

Explanation:

I hope this helps! please tell me if im wrong.

1. What enters a plant when stomata open? *
O carbon dioxide
O oxygen
O nutrients
O sugar
2. Loss of water vapor through stomata is called *

Answers

Answer:

The answer for 1 . Carbon dioxide

The answer for 2. Transpiration

Explanation:

What does this mean about the relationship between an
allele’s frequency and its likelihood of being dominant?

Answers

Microevolution is a change in the frequency of gene variants, alleles, in a population, typically occurring over a relatively short time period.
Population genetics is the field of biology that studies allele frequencies in populations and how they change over time if this doesn’t (I hope this is right if It don’t know what will)

A gene consists of which of the following?

1) A sequence of amino acids that create a specific protein.

2) A sequence of tRNA that brings the correct amino acid to the ribosome.

3) A sequence of bases of mRNA that code for a specific protein.

4) A sequence of bases on DNA that code for a specific protein.

Answers

Answer:

answer is part (4)

Explanation:

A sequence of bases on DNA that code for a specific protein

4) A sequence of bases on DNA that code for a specific protein.

Gene:A gene is the basic physical and functional unit of heredity.Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. However, many genes do not code for proteins. Alleles are forms of the same gene with small differences in their sequence of DNA bases.Every person has two copies of each gene, one inherited from each parent.

Thus, option 4 is correct.

Learn more:

brainly.com/question/25784376

why don't birds get electrocuted when they land on an electric wire?

please help me out :-)

Answers

Answer:

Electricity flows by the movement of electrons through conductors. If a bird perches on a wire with two feet there is no motivation to go through the birds' body so electrons choose the path of least resistance and continue to flow along the wire.

Explanation:

Answer:

Because there not grounded

Explanation:

During which stage of interphase does the cell grow to nearly its full size? (3 points)
First gap
Second gap
Prophase
Synthesis

Answers

This occurs during protein synthesis. This is because the cell continues to protein synthesise, therefore adding to the amount of cells.

I hope this helps.

Answer:

I'm pretty sure it's synthesis.

Explanation:

Trying to remember. I'm pretty sure though.

Does anyone have the answers to this lab, PLEASE HELP

Answers

bxjsksvfr dhbebe ehe edie s

A car with a mass of 2000 kg and a boat with a mass of 500 kg are both moving at the same speed.
What is the ratio of the kinetic energy of the car to the kinetic energy of the boat?
A. 2:1
B. 4:1
C. 9:1
D. 16:1

Answers

Answer:

B

Explanation:

 

Kinetic energy is possesed by a body by virtue of its motion. The ratio of the kinetic energy of the car to the boat is 4:1.

What is Kinetic energy?

The term kinetic energy refers to the energy that is possesed by a body by virtue of its motion.

Now;

Kinetic energy of the car = 0.5 * 2000 * v^2

Kinetic energy of the boat = 0.5 * 500 * v^2

The ratio of the kinetic energy of the car to that of te boat is; 0.5 * 2000 * v^2/0.5 * 500 * v^2 = 4:1

Learn more about kinetic energy: https://brainly.com/question/365923

I'm at school and I need help


100points for the answer

Answers

male

Explanation:

Females ovary always have a X chromosome.

Males sperms are of two types, they either have X chromosome or Y chromosome.

If X chromosome of males is involved in fission then, it results in XX chromosome set, it results in a female child.

If Y chromosome of males is involved in fission then, it results in XY chromosome set, it results in a male child.

I’m pretty sure it’s Female, because we were all born female at first, that’s what I heard on a video

what do geologist study

Answers

Answer:

The Earth and it's geography

Explanation:

Answer  Geologist Study fossils and rocks and other minerals of the earth

Explanation:

I just know since one of my friends is one

What remind’s you of the ribosomes in a cell???
Plz help due today!!

Answers

Answer:

i imagine them as peopel in a big city, or animals in the wild with predators that are hungry, the cell uses the ribosomes for food and to heal the cell with energy.

Explanation:

probably a factory since they make proteins

What happens to the pyruvate that enters the Krebs cycle?

Answers

The pyruvate is further oxidized to acetyl. It needs to be oxidized before it enters the Krebs cycle. Hope this helped!

5. How might an effective vaccine given to a large percentage of the population during a
pandemic change the pandemic's outcome? Support your claim(s) using evidence from Table 1

Answers

-most of the population will be vaccinated causing ‘herd immunity’ with this even if one was to get infected itd be difficult to pass it on to others
- table 1 shows the unvaccinated numbers being much higher in infected, hospitalised and deaths when not vaccinated at all as no one has immunity to the disease
- however we can see the major decrease in these negative effects when people are vaccinated in a pandemic, as these numbers rise the infected decreased by approx 60,000 and those hospitalised decreased on average showing the positive effects of an effective vaccine

Name the type of mutation below:
Orignial DNA: AATCCGC
Mutation DNA: AACCCGC

please help

Answers

Answer:

Deletion

Explanation:

The T was removed.

(Don't answer unless u want a ant in ur hair) Why do we need school?

Answers

Answer:who knows

Explanation:

Answer:

So that we can learn and get a job which gives us money then with that money we can see each other and I can get all the cuddles I want lol I’m never gonna let you hang out with your friends mwahahaha >:3

Explanation:

What is template and what is complementary strand? Please help me need ASAP

Answers

Answer:

The term template strand refers to the sequence of DNA that is copied during the synthesis of mRNA. ... The upper strand of DNA is the "mRNA-like" strand. The lower strand is the strand that is complementary to the mRNA.

Explanation:

Which statement best describe a chromosome?
A. It is a single piece of DNA that contains genes.
O B. It forms the hereditary material of all life on Earth.
OʻC. It is the passing of characteristics from one generation to the next.
O D. It is the part of a chromosome that ties together two chromatids.

Answers

It’s is c :) that’s the best choices

Answer: A

Explanation: It most definetly not B, becuase not every form of life has DNA. A chromosome is a single chain of DNA that is coiled and super coiled to form dense thread-like pieces. The term chromosome is derived from the Greek words "chroma" or color and "some" or body and is so named because chromosomes have the ability to be stained with dyes.

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