Answer:
B
Explanation:
Atoms connected by covalent bonds share electrons. Therefore, the correct answer is option B.
Extremely high ionization energies prevent some elements from accepting electrons, and extremely low electron affinities prevent some elements from accepting them. These elements' atoms frequently share their electrons with those of other elements or with other atoms of the same element in order for both atoms to achieve stability by forming an octet configuration in their respective valence shells. Covalent bonds are those associations that involve sharing electron pairs between entities of different or similar kinds.
Therefore, a pair of electrons is shared between atoms connected by a covalent bond. The correct answer is option b i.e. pairs of electrons.
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What must happen before a chemical reaction can begin
- the activation energy must be exceeded
- the activation energy must be reached
-the concentrations of products and reactants must be equal
- the concentration of reactant molecules must be reduced
Answer:
its B
Explanation:
The incident that happen before a chemical reaction can begin the activation energy must be reached. Thus, option B is correct.
What is activation energy?
The extra energy is the minimum amount of extra energy which required by reacting molecule to convert into the product.
Factor at which activation energy depends are as follows:-
1: Activation energy depends upon the nature of reactant if reactant is ionic then required activation energy is less and if reactant is covalent then required activation energy is high.
2: Nature of catalyst if catalyst is positive then required activation energy is less and if catalysts is negative then required energy is high.
3: Activation energy doesn't depend on pressure, temperature, volume etc.
Temperature is one the important factor at which any reaction is depend. In any reaction if temperature is increases the rate of reaction is increases and if temperature is decreases the rate of reaction is decreases.
Here, is the Arrhenius Equation which shows the temperature dependence of the rate of a chemical reaction.
k=Ae^−EaRT
Where,
k= rate constant of the reaction
A= Arrhenius Constant
Ea= Activation Energy for the reaction (in Joules mol^-1)
R= Universal Gas Constant
T= Temperature in absolute scale (in kelvins)
Therefore, The incident that happen before a chemical reaction can begin the activation energy must be reached. Thus, option B is correct.
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Ecosystem services are services that are supplied by humans for the environment.
O a. True
O b. False
does water have cell organization
Answer:
Yes
Explanation:
Cells are composed of water, inorganic ions, and carbon-containing (organic) molecules. Water is the most abundant molecule in cells, accounting for 70% or more of total cell mass. Consequently, the interactions between water and the other constituents of cells are of central importance in biological chemistry.
An enzyme in a cell became dysfunctional because of an alteration. As a result, the DNA strands would not separate to begin the replication process. Which enzyme has been affected?
Answer:
C. Helicases
Explanation:
Helicases to be termed as enzymes that is blind and contains acid i.e. remodel nucleic or have protein i.e. nucleic acid. It is important as the time of DNA replication as it divided the DNA i.e. double stranded into one single standard that permits each and every strand for copied it
Also it cracks the bonds i.e. hydrogen that lies between the two strands this could create a replication fork.
Therefore in the given case, the helicases is affected
Answer:
helicases
Explanation:
its just right
What advantage did sharks have over its rivals that didn't survive the
Devonian extinction?
All organelles float around in the _________________.
Answer:
The answer is cytoplasm.
cytoplasm
Explanation:
because its in the cell and its the main part of everything floating
A biology student wants to conduct a study of how the amount of food affects weight gain for mice. He sets up four cages with a mouse in each cage. What are the independent variable, dependent variable, and constants? For the independent variable, what would you put in the box below for each mouse?
Answer:
dependent variable is the weight (gain) - weight depends on the food being eaten. The dependent variable "depends" on the independent variable, hence....
independent variable is amount of food
the constant is the type of food.
Explanation:
. Distinguish between gross primary productivity and net primary productivity. Explain how net primary productivity affects the number of consumers in an ecosystem and on the earth. List two of the most productive ecosystems or aquatic life zones and two of the least productive ecosystems or aquatic life zones. Use the concept of net primary productivity to explain why harvesting plants from estuaries, clearing tropical forests to grow crops, and harvesting the primary producers in oceans to feed the human population are not good ideas.
Answer and Explanation:
The gross primary productivity corresponds to the sum of all the energy produced by the plants (primary producers) during the photosynthesis process. The net primary productivity, corresponds to the gross primary productivity value, even the energy value used by the plants in the metabolic processes that they present, in this way, we can conclude that the net primary productivity is the energy that is available for the living beings that consume the vegetias.
The ecosystems with the highest level of productivity are those that have a large number of vegetables with full access to the sun, in this case, we can mention forests and ecological parks. On the other hand, ecosystems with lower levels of productivity are those with a low number of plants, such as cities and areas with deforestation.
Because of our need to consume energy from net primary productivity, we are constantly harvesting vegetables and some photosynthetic water products to use in our food. However, this causes us to remove vegetables from nature and decrease the amount of gross primary productivity that ecosystems would have, and, consequently, decreasing the amount of net primary productivity that we need so much.
What does an atom consist of?
Answer:
Atom consist of subatomic particles.
Explanation:
Which are electron, proton and neutron.
How can you cause a substance to turn from a solid to a liquid or a liquid to a gas?
Answer:
heat
Explanation:
It's the Perfect Weather for a First
Date
(Climate Diagram - Temp = Line Graph, Precip
Bar Graph)
18
36
32
16
28
24
20
14
16
12
12
10
Precipitation (cm)
Temperature (°C)
4
12
-16
-20
24
-28
-32
- 36
0
1 F M A M J J A S O N D
Month
Answer:
gay
Explanation:
oops
Which of the following is not a characteristic of an industrial society? a. Moves from place to place following resources b. Uses new sources of energy c. Increases pollution d. Uses complex tools and systems
Answer: Option A.
Moves from one place to another following resources.
Explanation:
Industrial society does not move from one place to another because it is a society that involves the use of technology in the production of foods and services to support large population and use of high labour.
An industrial society does not move from one place to another rather they are situated within a geographical location and uses new sources of energy, complex tools and systems and increases pollution which is due to Advent of technology .
Answer:
a. Moves from place to place following resources
Explanation:
Give one example of a disease caused by a bacteria. Write some information and fact about this disease.
Answer:eh the black death it was infecting peeps around the 1500's.it was originally spread by rats and fleas but after people got infected the black death or bubonic plague got transmitted by people.
Explanation:eh by history
Need help ASAP! 20 points! I will give BRAINLIEST!
Explanation:
2.004 * 1^11 is not in scientific notation as there is no power of 10 written. We note that 2.004 * 1^11 equals 2.004, which can be written as 2.004 * 10^0.
Create a food chain that is 4 trophic levels using our desert ecosystem. The food chain
Why is earth interior layered??
Answer:
The inner core is solid, the outer core is liquid, and the mantle is solid/plastic. This is due to the relative melting points of the different layers (nickel–iron core, silicate crust and mantle) and the increase in temperature and pressure as depth increases.
Explanation:
Which feature of nuclear fission reactions allows these reactions to take place in a chain reaction?
Thermal energy is released and heats up the reactants.
More smaller atoms form that can undergo fission.
A larger atom is formed, which can then be split.
Neutrons start the reaction and are released during it.
Answer:
Neutrons start the reaction and are released during it
Explanation:
N
Neutrons start the reaction and are released during it is the correct answer.
What is responsible for chain reaction?Neutrons start the reaction and are released during it is the feature of nuclear fission reactions that allows these reactions to take place in a chain reaction because the neutron that is released hit the other atom which leads to the start of other reaction and so on.
so we can conclude that Neutrons start the reaction and are released during it is the correct answer.
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Need help emt science class
Answer:
What to do during a flood
Explanation:
Give an example of warning coloration used in
nature.
Answer:
Warning coloration (aposematism) is effectively the "opposite" of camouflage and a special case of advertising. Its function is to make the animal, for example, a wasp or a coral snake, highly conspicuous to potential predators, so that it is noticed, remembered, and then avoided.
Hope this helped you.
if the answer is entriguing enough ill give brainliest
What is the meaing of life?
The actual meaning of life is to fulfill your purpose in life and accomplish your goals. What I mean by this is, everyone has a purpose, of why they are living. None of us will be here if we all didn't have a purpose
The alignment causes a solar eclipse.
Answer:
Whats the question?
Explanation:
Answer:
the moon moves just far enough to cast a shadow to cause an eclipse.
Which of the following statements correctly supports the conclusion that eukaryotic cells are more complex than prokaryotic cells?
A. only eukaryotic cells contain ribosomes
B. Only eukaryotic cells can be seen using a microscope
C. Only eukaryotic cells contain membrane bound organelles
D. Only eukaryotic cells contain DNA and RNA
What is the process by which cells become differentiated?
Answer:
Cellular differentiation is the process in which a cell changes from one cell type to another. Usually, the cell changes to a more specialized type. Differentiation occurs numerous times during the development of a multicellular organism as it changes from a simple zygote to a complex system of tissues and cell types.
Answer: Cellular differentiation
Explanation:
Which statement describes the major role of lipids within a cell?
A. They cause DNA to replicate
B. They move RNA in the cytoplasm.
C. They catalyze chemical reactions in the cell cytoplasm.
D. They are the main structural components of membranes.
Answer:
I think d
Explanation:
Lipids perform three primary biological functions within the body: they serve as structural components of cell membranes, function as energy storehouses, and function as important signaling molecules. The three main types of lipids are triacylglycerols (also called triglycerides), phospholipids, and sterols.
Scientists have developed a new herbicide for dandelions that is specifically designed to prevent the conversion of stored energy. Which process does this herbicide affect?
Answer:
Ability to make ATP or the release of oxygen from chloroplasts.
Explanation:
Given that, ATP which is an acronym for Adenosine triphosphate, is where the energy is stored and produced in a plant and at the same time Herbicides affect plants in the area of photosynthesis specifically affecting the release of oxygen from chloroplasts, which in turn prevents the generation of energy required for plant growth.
Hence, in this case, the new herbicides affect the ability to make ATP in plants or the release of oxygen from chloroplasts.
state two functions of protein
Answer:
1- constitute cellular structures.
2- confer elasticity and resistance to órganos and tissues.
Answer: Some proteins help cells keep their shape, others help build muscle tissue, and others help break down chemicals
Explanation: Hope this helps :)
reasoning from isolated observations to general principles is called ________?????? ________ means using general principles to make specific conclusions or predictions. ?????
Answer:
inductive reasoning. Reasoning from specific observations to a general conclusion.
Explanation:
Tell me if I'm right.
What are some characteristics of the type of khoomii singing known as kargyraa?
Answer:
1. It produces a very deep sound.
2. It combines the vocal and vestibular folds at the same time.
3. It causes the vibration of the vestibular folds. A vibration cycle culminates at the second vibration.
4. There are basically two types, namely the Dag and Xovu styles.
5. It resembles a Tibetan Buddhist chant.
Explanation:
Khoomii, also known as Tuvan throat singing is a way of singing mostly characterized by the production of deep sounds and vibrations. A basic pitch which is supplemented by another pitch combine to produce the sound. It is sung by the locals in Siberia and Tuva.
Kargyraa is one of the four forms of this song and it typically involves the production of deep sounds and some vibrations of the vestibular folds at times. There are two basic types which are the Dag and Xovu. It also has a similarity to the chant produced by the Tibetan Buddhists.
What are four types of organic compounds found in all living things?
Answer:
Most organic compounds making up our cells and body belong to one of four classes:
carbohydrateslipidsproteinsnucleic acidsHope this helps :)
Answer:
carbohydrates, lipids, proteins, and nucleic acids
Explanation:
Do protists (amoeba, Euglena, Paramecium) use similar structures to move? Explain.
Answer:
Most protists move with the help of flagella, pseudopods, or cilia. Some protists, like the one-celled amoeba and paramecium, feed on other organisms. Others, such as the one-celled euglena or the many-celled algae, make their food by photosynthesis. ... Theyuse pseudopods to move away from bright light or to trap food.
Within the protist kingdom, organisms have developed very similar structures that are used to move around the environment.
The protist kingdom is primarily comprised of very small, single-celled organisms. Among the vast number of organisms that make up this kingdom are algae and amoebas. Over the course of history, these organisms have evolved very similar means of mobility.
Within the protist kingdom, most of the organisms move with one of the structures:
CiliaPseudopodiaFlagellaThese three structures used by protist to move are very similar in that are all structural extensions on the exterior limit of a cell. Though clear differences exist in the number or other uses of these extensions, it is clear that all of the members of this kingdom have evolved similar means of mobility.
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