alkali metals are listed in the first column of the periodic table. this tells you that

a they are highly reactive

b they have only one electron in their outer orbital shells.

c their nuclei contain only one neutron

d both a and b​

Answers

Answer 1

Answer:

B. they have only one electron in their outer orbital shells


Related Questions

Based on the test results, are the worm neurons alive?

Answers

Answer:

Yes

Explanation:

In the inner-world perspective of the simulation, the worm is absolutely alive as it is obeying the laws of physics as presented by the simulation.

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Since it is adhering to the simulation's depiction of the rules of physics, the worm neurons appear to be completely alive from the simulation's inner-world perspective.

What is the worm?

The worm is a frequently utilised organism in neuroscience research, because of the limited amount of neurons it contains For instance, the hermaphrodite form of the worm contains 302 neurons in its nervous system, as opposed to the 86 billion neurons found in humans.

Every animal requires a brain to survive, and worms are no different. Their brains control movement, sensory perception, and any other physical processes essential to their existence. A worm cannot, however, use its brain for thought.

Therefore, The worm neurons appear to be fully alive from the simulation's inner-world perspective because it is obeying the simulation's representation of the laws of physics.

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In ‘lifting due to topography,’ what happens to air as it rises?

Answers

when air is confronted by the mountain,it is lifted up and over the mountain,cooling as it rises

10. If an A (adenine) is exchanged for a C (cytosine) in a gene, it is a:

Answers

Answer:

Explanation:

A mutation occurs, and cytosine is replaced with adenine. ... (Figure) Adenine is larger than cytosine and will not be able to base pair properly with the guanine on the opposing strand. This will cause the DNA to bulge.

Question 6
Which list best identifies the processes that move carbon through an ecosystem?
A
photosynthesis, respiration, consumption, decomposition, erosion, and burning
B
respiration, transpiration, weathering, consumption, burning, and sedimentation
Ос
respiration, transpiration, decomposition, weathering, sedimentation, and infiltration
D
photosynthesis, respiration, sedimentation, infiltration, erosion, and decomposition

Answers

Carbon cycles through the ecosystem via the processes of; photosynthesis, respiration, consumption, decomposition, erosion, and burning.

Carbon is one of the nutrients that cycles through the ecosystem. These chemical elements move through the various spheres of the ecosystem such as atmosphere, lithosphere and hydrosphere.

Carbon cycles through the ecosystem via the processes of; photosynthesis, respiration, consumption, decomposition, erosion, and burning.

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9. how do sister chromatids compare to each other?

Answers

Answer:

The sister chromatids are identical to one another and are attached to each other by proteins called cohesins. They are formed.

Explanation:

which example is one specific form of simple diffusion?

Answers

Answer:

What is one specific form of simple diffusion? If water moves into a cell by osmosis, it is moving into an area of higher solute concentration. Why is diffusion important to cells? It helps maintain the balance of materials needed for survival, such as oxygen and water.

Explanation: Hope this helps!!!

can anyone help please,question on the pictute

Answers

Answer:

A. In water it is stabilizing the amount of water coming in and out of the cell.

   In the sugar solution, it is filled with the sugar solution.

B. Transpiration

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Explain what a basal cell is and why they are so important to the rest of the epidermis.

Answers

Answer:

The basal cell layer contains cells called melanocytes. Melanocytes produce the skin coloring or pigment known as melanin, which gives skin its tan or brown color and helps protect the deeper layers of the skin from the harmful effects of the sun.

ASAP HELP 100 POINTS Which describes nuclear fission?

starts when two atoms slam together, causing the larger atom to split into two smaller atoms

starts when a neutron slams into an atom, causing two atoms to form one, heavier atom

starts when two atoms slam together to form one, heavier atom


starts when a neutron slams into an atom, causing the larger atom to split into two smaller atoms

Answers

Answer:

to study the nature and size of the image formed by a convex lens using a candle and a screen activity file

The statement that describes nuclear fission is as follows:

Starts when a neutron slams into an atom, causing the larger atom to split into two smaller atoms.

Thus, the correct option for this question is D.

What is Nuclear fission?

Nuclear fission may be defined as a type of nuclear reaction during which the nucleus of an atom splits into two or more smaller nuclei due to the impact of another particle with the liberation of a very large amount of energy.

Nuclear fission is a process where a heavy nucleus is bombarded through neutrons and due to this, it becomes unstable. This causes it to decompose into two or more nuclei spontaneously with equivalent size and magnitude. It involves a tremendous detachment of energy as well as the emission of two or more neutrons.

Therefore, the statement "starts when neutron slams into an atom, causing the larger atom to split into two smaller atoms" describes the process of nuclear fission. Thus, the correct option for this question is D.

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during which of the following processes do sister chromatids separate from each other?

Answers

Answer:

Sister chromatids separate from each other during anaphase of mitosis and the anaphase II of meiosis II. During the anaphase stage of mitosis these chromatids separate and one chromatid goes into each daughter cell. During cell division they are separated from each other and each daughter cell receives one copy of the chromosome.

Explanation:

Drag each label to the correct location on the image. Identify the remaining processes and components of the carbon cycle.

Answers

Answer:

what labels

Explanation:

the time interval required for the formation of two cells from one is called the

Answers

Answer:

The Generation Time.

Explanation:

When septum formation is complete the cell splits into two progeny cells. The time interval required for a bacterial cell to divide or for a population of bacterial cells to double is called the generation time.

Hope this helps!! Brainliest? Anyways have a great day!! :))

Cells are living entity, which undergo division for the continuity of life and transmitting genetic information.

The time interval required for the formation of two cells from one is called the generation time.

Generation time is defined as:

The time required for a bacterial cell or population of the bacteria to double in number is referred to as generation time.

In general, generation time is the average interval of time required between the birth of an individual and the birth of offspring.

Thus, the generation time is the interval between the formation of two cells.

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how long does it take blood to circulate through the body

Answers

Answer:

1 minute

Explanation:

It takes one minute for blood to circulate from the heart.

The average adult's heart beats 100,000 times per day.

the allowance for uncollectible accounts is a contra account to

Answers

The allowance for uncollectible accounts refers to a company that accepts the risk of giving credits to those who may not pay it back. These debts are written off as uncollectable and are a contra asset on the balance reports.

Uncollectable accounts are also often referred to as doubtful accounts. This implies that the company that is giving the credit accepts the possibility that this entity may not return the money. This results in a loss for the company as is recorded as a contra asset on the balance sheets for the company. Some ways for companies to control this loss are:

Establishing requirements for creditsUsing credit collectors to claim large debtsLimiting amount of loss permitted based on historical and industry records.

A contra asset or contra account is an account on a companies balance sheet that decreases the balance of certain assets. Contra derives from Latin and means against. Meaning this is an account that goes against the positive balance of the company, it subtracts from the companies earnings.

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An ecosystem that can experience a disturbance without being fundamentally damaged is said to have __________________.​

Answers

An ecosystem that can experience a disturbance without being fundamentally damaged is said to have: Inertia.

An ecosystem can be defined as a biological community or space that comprises all living organisms (biotic factors) and the physical environment (abiotic factors) with which they interact.

Basically, an ecosystem is responsible for the provision of the following essential services that are very vital and important for the sustenance of life in all living organisms;

Plant pollination.Water purification.Nutrient cycling.

Additionally, an ecosystem is said to have an inertia if it experiences a disturbance or factor of changes without it being damaged significantly or fundamentally.

For example, the development of shrub forests during the Medieval Warm Period is an inertia of the ecosystem.

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Which sources of energy are used by humans to produce electrical energy

Answers

Answer: sources of energy are used by humans to produce electrical energy fossil fuels (coal, natural gas, and petroleum), nuclear energy, and renewable energy sources.

Explanation:

I hope that's what you're looking for. Have a nice day.

What is evaporation?​

Answers

Answer:

When liquid turns into vapor

Explanation:

hope this helps <33

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A liquid turning into a gas is evaporation. It is how water gets from the surface of the Earth to the atmosphere.

Temperature, surface area, wind speed, and humidity affect a liquid's evaporation rate.

Latent heat is a form of energy held in the evaporated water when it evaporates and cools.

Most of the air's moisture evaporates from rivers, lakes, seas, and oceans. Water at the surface of the Earth evaporates into water vapor, which rises into the sky and forms clouds, which eventually release water back onto Earth as precipitation.

of all the flexor muscles of the forearm, the __________ is the shortest.

Answers

Answer:

pronator teres

Explanation:

what determines the primary structure of a dna molecule?

Answers

Answer:

I would go with the sequence of the bases in the nucleic acid chain

The sequence of nucleotides defines the primary structure of DNA and RNA where the nucleotides are linked to the oxygen on the 5' carbon of one through the phosphodiester bond linking to the oxygen on the 3' carbon of the other.

What is DNA?

Deoxyribonucleic acid is a polymer which is made up of two polynucleotide chains that coil around each other to carry the genetic instructions for growth, function, development, and reproduction in all known organisms and many viruses. DNA and RNA are nucleic acids.

DNA is made up of chemical building blocks called nucleotides which are building blocks made up of three parts:

1. A phosphate group

2. A sugar group

3. One of four types of nitrogenous bases i.e. adenine (A), cytosine (C), guanine (G), and thymine (T)

To form a strand of DNA, nucleotides are linked in chains, alternating between phosphate and sugar groups.

Thus, the sequence of nucleotides defines the primary structure of DNA and RNA where the nucleotides are linked to the oxygen on the 5' carbon of one through the phosphodiester bond linking to the oxygen on the 3' carbon of the other.

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a farmer and his hired help were carrying grain to the barn. the farmer carried one sack of grain and the hired help carried two sacks. who carried the heavier load and why?

Answers

Answer:

the hired carried the heavier load coz he carried 2 sacks when farmer carried one sack

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the circulatory system and the nervous system both

Answers

The circulatory system provides your brain with a constant supply of oxygen-rich blood while your brain regulates your heart rate and blood pressure.Answer:

Explanation:

Why do you think there are more organisms and energy available for life in the producer level?

Answers

Answer:

Producers which means plants have the most energy in a food chain or web besides the sun and they give an organism more energy than a primary consumer or secondary consumer would. Plants absorb about 1% of the sunlight that strikes them. The rest is reflected into space or transmitted through objects.

prokaryotic cells and eukaryotic cells similarities

Answers

Answer:

Three similarities between prokaryotic and eukaryotic cells are that both have vesicles, vacuoles, and the ability to carry out the eight functions of life. Prokaryotes do not have organelles.

Explanation:

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Why is water described as a polar molecule ?

Answers

Answer:

It is described as a polar molecule because of an unequal sharing or electrons, causing the molecule to have a more bent shape.

Explanation:

Electrons are attracted a bit more to the oxygen and spend more time with them than the hydrogen.  

what is the ultimate source of energy for almost all organisms?

Answers

Answer: The sun. The sun fuels all plants which fuels the animals, which fuel people.

Answer:

The sun

Explanation:

A species of snake has evolved resistance to a poisonous newt allowing the snakes to prey on the newts. The newts have become more poisonous over time, as a result, leading to a kind of evolutionary arms race. This is an example of ____.


coevolution

mimicry

environmental resistance

commensalism

ecological succession

Answers

The newts have become more poisonous over time, as a result, leading to a kind of evolutionary arms race. This is an example of coevolution.

Coevolution is the process of evolutionary change that occurs between pairs or group of species as they interact with one another.

The predator-prey relationship is the most common type of coevolution. This involves the prey evolving so as to avoid capture and thus leading to the evolution of the predator so as to become more effective hunters.

Predator-prey coevolution is a kind of evolutionary arms race.

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HELP!!!!!!!!!11 100 POINTS!

Answers

Answer:

1. Cell membrane

2. Ribosomes

3. Mitochondria

4. Rough endoplasmic reticulum

5. Chromatin

6. Nucleolus

7. Cytoplasm

8. Nucleus

9. Smooth endoplasmic reticulum

10. Golgi vesicle

11. Golgi apparatus

12. Lysosome

Answer:

1. Cell membrane2. Ribosomes3. Mitochondria4. Rough endoplasmic reticulum5. Chromatin6. Nucleolus7. Cytoplasm8. Nucleus9. Smooth endoplasmic reticulum 10. Golgi vesicle11. Golgi apparatus12. Lysosome

Explanation:

Identify the independent variable and the dependent variable in your penny
experiment?

Answers

Answer:

Independent Variable = The thing you change

Dependent Variable = The thing you measure

Explanation:

An independent variable is the thing that you are changing in your experiment to be able to get different results. For example, if a question says "What will happen to a cup of tea when you change the temperature of the water added to it?"... then the independent variable will be the temperature of the water.

A dependent variable is the thing that you are measuring. For example, if you are studying the amount of light absorbed from different surfaces, then the dependent variable is the unit of light absorbed, which would be measured in Au (Absorbance unit).

You can now take this knowledge and apply it to your question.

select the cell cycle impairments that you predict would lead to cancer. recall that cancer arises from unregulated, repeated cell divisions. choose all that apply.

Answers

Cancer cells can arise in a variety of ways, the most common, however, tends to be genetic mutations.

Genetic mutations can occur during the life of a cell due to outside factors such as:

The food we eatThe environment we expose the cell toThe substances that touch the cell (e.g skin cells)

That being said, the most common time for a genetic mutation to take place is during cellular division. During this time the DNA that encodes the cells is duplicated. Genetic mutations in this DNA sometimes cause the elimination of  programmed cell death.

Programmed cell death is what tells a cell when it should stop growing and dividing. This is a regulatory function designed to keep the number of cells at a balance, growing only when needed. As this cell multiplies, this produces an increasing number of cells that will not die. The accumulation of these cells is referred to as cancer.

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a biologist studies an ecosystem and finds that it has very few trophic levels. What can you conclude about this ecosystem?

Answers

not a stable ecosystem
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It supports the idea that American troops will not occupy another country after defeating the enemy. It supports the point that the war is an ongoing effort that cannot be won overnight. It contributes to the notion that being a soldier is physically and emotionally demanding work. How did the US support its allies prior to entering the war?sent spies to find where enemy camps were locatedestablished a war campaign fund for foreign troopsgrew food to support soldiersestablished the Lend-Lease Act