How many atoms are present in 3H^2O

Answer:

C

Explanation:

Nuclear energy is the energy in the nucleus, or core, of an atom. Atoms are tiny units that make up all matter in the universe, and energy is what holds the nucleus together. There is a huge amount of energy in an atom's dense nucleus.

Answer:

Explanation:

Cell is discovered by Robert Hooke.

Answer:

The cell is initially discovered by Robert Hooked in 1665

Answer:

The correct answer is - rainwater or groundwater form carbonic acid that dissolves sections of bedrock.

Explanation:

A sinkhole is a natural hole or cave-like structure formed on the surface of the due to the chemical weathering of sections of bedrock made of carbonate rocks like limestone, dolomite, as well as salt beds or rocks.

Rainwater or groundwater comes in contact with CO2, a weak acid known as carbonic acid is formed, That can dissolves or weathers the lime stone or the carbonate rock of sections of the bedrocks and makes huge cracks or hollow out vast networks of caves.

Answer:

Plants, like cacti, don't have leaves in the traditional sense. (Their spines are actually modified leaves.) But the cells in the body or “stem” of the cactus plant still contain chlorophyll. Thus, plants like cacti can absorb and convert energy from the sun through the process of photosynthesis

Explanation:

photosynthesis also takes place in plant roots

Answer:

Motile' (or moving) cilia are found in the lungs, respiratory tract and middle ear. These cilia have a rhythmic waving or beating motion. They work, for instance, to keep the airways clear of mucus and dirt, allowing us to breathe easily and without irritation. They also help propel sperm.

.

Please give me a brainliest

Answer:

It could mean that those two populations could be common ancestors because the spelling differences are the same

Explanation:

The similar spelling variations between the two populations could imply that they share common ancestry.

Deoxyribonucleic acid, or DNA, is the name given to the genetic material carried by humans and nearly all other species. An individual's DNA is present in nearly all of their cells.

Nucleotides are the molecular building components that make up DNA. A phosphate group, a sugar group, and one of four different nitrogen bases make up these building components. Nucleotides are joined into chains and the locations of the phosphate and sugar groups are switched to form DNA strands.

Every cell in the body has DNA in its nucleus. Groups of these firmly bound fragments make form chromosomes. The majority of people possess 46 pairs of chromosomes, or 23 pairs per pair.

Thus, The similar spelling variations between the two populations.

For more information about DNA, click here:

https://brainly.com/question/2642255

#SPJ5

Answer:

This discovery is known as heredity.

Explanation:

In the question above, we can see an example of heredity, which is the process where a trait is passed from an ascendant to a descendant. As seen above, the wrinkled seed is a characteristic that was passed on to a plant through its parent, the plant that gave rise to it. The characteristics passed by heredity are transmitted through the continuous transfer of genetic material, present in the DNA. Since the descendants have the DNA of their parents, it is possible that the characteristics are transmitted as the generations advance.

Answer:

An outline, and a goal, list of materials, and a set of steps to follow.

Hope that this helps!

Answer:a

Explanation:

Answer:

2.1×0.06^3= the correct answer

Explanation:

using a compound formula used for interest u can use this to see how the population is increasing by multiplying the principal×rate^time

Answer:

Population at the end of 2015 is 2.5 million.

Explanation:

Population of Dubai at the end of 2012 is 2.1 million.

Rate of increase of population is 6%

Population at the end of 2013 is 2.1 million +(6% of 2.1 million) =2.226 million.

Population at the end of 2014= 2.226 million + 6% of 2.226 million = 2.35956 million.

Population at the end of 2015 is = 2.35956 million + 6% of 2.35956 million = 2.5 million.

Hope this answer helps you :)

Have a great day

Mark brainliest

Answer:

Height

Chest/Bust

Waist

Hips

Inside Leg

Answer: D.) organisms began to die as the population was larger than could be supported by the limiting factors

Explanation: i just took this assessment :)

The best explanation for the microbial population beginning to decrease after a period of time is that organisms began to die as the population was larger than could be supported by limiting factors. The correct option is D).

Applying population ecology and population genetics to study the ecology and evolution of bacteria, archaebacteria, microscopic fungi (like yeasts), and other microscopic eukaryotes is known as microbial population biology.

The evolution of the bacterial population. Growth starts out exponential. After that, the population curve levels off, which most likely denotes the population's carrying capacity. A drop in the microbial population is then shown by the curve's downward bend. Numerous causes, both density-dependent and density-independent, can be blamed for the drop.

Therefore, the correct option is D) organisms began to die as the population was larger than could be supported by the limiting factors.

To learn more about the population, refer to the link:

https://brainly.com/question/13052182

#SPJ2

Answer:

1. 294N

2. 294N

3. 19.6N

4. 19.6N

5. 4.9N

6. 4.9N

7. 80N

8. 185N

Explanation:

The weight of an object is the force that gravity is having over it, and we measure it in Neutowns (N), which equals Kg x m/s².

To find the weight of an object, we use the formula F= m x g.

F stands for force, m for the object's mass, and g for gravity, which is the force that attracts objects to Earth, and we measure it by the acceleration that an object has during free falling.

The Earth's gravity is 9.8 m/s²

1. We use the formula F=m x g

F= 30kg x 9.8 m/s²

F= 294 N

2. We have to convert the 30000g into kg to use the formula

30000÷1000= 30kg

30000g equals to 30Kg, so the object's mass (m) is 30Kg.

F= m X g

F= 30kg X 9.8 m/s²

F= 294 N

3. F= m X g

F= 2kg X 9.8 m/s²

F= 19.6 N

4.We have to convert the 2000g into Kg.

2000÷1000= 2Kg

The object's mass (m) is 2Kg.

F= m X g

F= 2kg X 9.8 m/s²

F= 19.6 N

5. F= m X g

F= 0.5 kg X 9.8 m/s²

F= 4.9 N

6.We have to convert 500g to Kg.

500g÷1000=0.5Kg

The object's mass (m) is 0.5 kg

F= m X g

F= 0.5 Kg X 9.8 m/s²

F= 4.9 N

7. The gravity on the moon is different from the one on Earth. In the formula, instead of 9.8 m/s² for the gravity (g), we use 1.6 m/s².

F= m X g

F= 50Kg X 1.6m/s²

F= 80N

8. The gravity (g) on Mars is 3.7 m/s², so we have to use it in the formula where it says g to find the object's weight on Mars

F= 50Kg X 3.7m/s²

F= 185 N

Explanation:

What are the organs of the immune system?

Publication Details

Our immune system is made up of both individual cells and proteins as well as entire organs and organ systems. The organs of the immune system include skin and mucous membranes, and the organs of the lymphatic system too.

Organs that function as barriers

Your skin and mucous membranes are the first line of defense against germs entering from outside the body. They act as a physical barrier with support from the following:

Antibacterial substances can kill germs right from the start. A certain enzyme found in saliva, the airways and tear fluid destroys the cell walls of bacteria.

Mucus in the bronchi helps trap many of the germs we breathe in so they can be moved out of the airways by hair-like structures called cilia.

Stomach acid stops most of the germs that enter the body in the food we eat.

Harmless bacteria on our skin and many of the mucous membranes in our body also act as part of the immune system.

In addition, the reflexes that cause us to cough and sneeze help to free our airways of germs.

Illustration: The parts of the immune system

The parts of the immune system

Lymphoid organs

The lymphatic system is composed of:

Primary lymphoid organs: These organs include the bone marrow and the thymus. They create special immune system cells called lymphocytes.

Secondary lymphoid organs: These organs include the lymph nodes, the spleen, the tonsils and certain tissue in various mucous membrane layers in the body (for instance in the bowel). It is in these organs where the cells of the immune system do their actual job of fighting off germs and foreign substances.

Bone marrow

Bone marrow is a sponge-like tissue found inside the bones. That is where most immune system cells are produced and then also multiply. These cells move to other organs and tissues through the blood. At birth, many bones contain red bone marrow, which actively creates immune system cells. Over the course of our life, more and more red bone marrow turns into fatty tissue. In adulthood, only a few of our bones still contain red bone marrow, including the ribs, breastbone and the pelvis.

Thymus

The thymus is located behind the breastbone above the heart. This gland-like organ reaches full maturity only in children, and is then slowly transformed to fatty tissue. Special types of immune system cells called thymus cell lymphocytes (T cells) mature in the thymus. Among other tasks, these cells coordinate the processes of the innate and adaptive immune systems. T cells move through the body and constantly monitor the surfaces of all cells for changes.

Lymph nodes

Lymph nodes are small bean-shaped tissues found along the lymphatic vessels. The lymph nodes act as filters. Various immune system cells trap germs in the lymph nodes and activate the creation of special antibodies in the blood. Swollen or painful lymph nodes are a sign that the immune system is active, for example to fight an infection.

Spleen

The spleen is located in the left upper abdomen, beneath the diaphragm, and is responsible for different kinds of jobs:

It stores various immune system cells. When needed, they move through the blood to other organs. Scavenger cells (phagocytes) in the spleen act as a filter for germs that get into the bloodstream.

It breaks down red blood cells (erythrocytes).

It stores and breaks down platelets (thrombocytes), which are responsible for the clotting of blood, among other things.

There is always a lot of blood flowing through the spleen tissue. At the same time this tissue is very soft. In the event of severe injury, for example in an accident, the spleen may rupture easily. Surgery is then usually necessary because otherwise there is a danger of bleeding to death. If the spleen needs to be removed completely, other immune system organs can carry out its roles.

Answer:

D

Explanation:

The diagram below shows a portion of a chromosome during meiosis. Meiosis is a process of cellular division that produces haploid gametes from diploid cells. The process of meiosis involves two rounds of nuclear division.

During the first round, homologous chromosomes pair up and exchange genetic material. This process is known as crossing over.

The diagram below shows a section of the chromosome during the first meiotic division. The chromosome is composed of two sister chromatids, which are identical copies of each other.

These sister chromatids are held together by a centromere. At this stage, the sister chromatids are in the process of separating from each other. The arrows indicate the direction of movement of the chromatids as they separate. The diagram also shows a section of the chromosome where the two sister chromatids have already separated.

This section is known as a chiasma, and it is the result of crossing over. During crossing over, segments of DNA from the two homologous chromosomes exchange places. This process creates genetic variation in the gametes, which is important for evolution.

In conclusion, the diagram shows sister chromatids separating, alleles independently assorting, segments of DNA crossing over, but not genes replicating. The correct answer is A. Sister chromatids are separating.

Learn more about  DNA  at:

https://brainly.com/question/264225

#SPJ2

Answer:

A noxa is any component of the natural context, with the ability to generate some harm to the person who touches it.

Explanation:

Any blow with mechanical damage, change in temperature or pressure, UV radiation, plutonium, strontium, X-rays, electricity, loud noises is considered physical noxa.

Examples of this can be: Physical hazards: noise, radiation (ultraviolet, x-rays), electricity, blows, breaks, burns, cuts.

Chemical noxa is toxic and poisons, mostly of exogenous origin, that enter the body accidentally.

Examples of this can be: Chemical noxes: insecticides, pesticides, poisons, toxic gases, co2, co.

Biological noxas are living beings or viruses recognized as pathogenic agents, since they cause diseases of varying symptoms, evolution and severity, but which are called infectious diseases.

Examples of this can be: bacteria, protozoa, fungi and non-cellular entities, such as viruses.

Psychosocial noxas are actions or lack of actions that can cause mental disorders and that can lead to physical problems. Its impact is often negative on general well-being, particularly for young people.

Examples of this can be wars, racism or bullying.

Answer:

B

Explanation:

Genes have to do with your traits or what genetics you have. They can be inherited by parents, or grandparents. Genes are the expression of a trait.

Answer:

It is the oxidation of food substances to release energy for metabolic activities

Explanation:

it is a biochemical process which involves the breaking down of food substances by the cell with or without oxygen for metabolic activities

Explanation:

Respiration is defined as a metabolic process wherein, the living cells of an organism obtains energy (in the form of ATP) by taking in oxygen and liberating carbon dioxide from the oxidation of complex organic substances.”

Answer:

The most destructive type of mass movement is a landslide, which occurs when rock and soil slide quickly down a steep slope. Some landslides may contain huge masses of rock, while others may contain only a small amount of rock and soil. A mudflow is the rapid movement of a mixture of water, rock, and soil.

Answer:

answer is in the picture above

Answer:

Yes

Explanation:

In sediments or sedimentary rocks the porosity depends on grain size, the shapes of the grains, and the degree of sorting, and the degree of cementation. Well-rounded coarse-grained sediments usually have higher porosity than fine-grained sediments, because the grains do not fit together well

Answer:

The myogenic heart is the characteristics of vertebrates where continuous rhythmic contraction occurs. The myogenic heart is the intrinsic property of the cardiac muscles. Each contraction of the heart muscle regulates the flow of blood in the form of a pulse or heart rate.

Explanation:

i hope its helps

Answer:

1. mRNA

Explanation:

2. messenger RNA (mRNA) carries the protein blueprint from a cell's DNA to its ribosomes, which are the "machines" that drive protein synthesis.

Answer:

A

Explanation:

Answer:

A, B, and D

Explanation:

Red light is reflected by the material.

Green light is absorbed by the material.

Blue light is absorbed by the material.

According to the model, red is not absorbed, which means it is reflected. It cannot pass through nor is it absorbed. Blue light and green light do not pass through, but they are not reflected either. This is called absorption.

Answer:

The correct answer is - C. the arrows from the Earth's surface to the atmosphere and from the atmosphere to the Earth's surface.

Explanation:

Interaction between radiation and greenhouse gases can be demonstrated or represented by a model which shows how the radiation from different sources of the earth's surface is released in the atmosphere and how the radiation comes to the earth's surface from the atmosphere of the earth.

The radiation trapped by the greenhouse gases and more infrared radiation will be absorbed and emitted back toward Earth's surface, which affects and show more greenhouse effect.

Answer:  B is wrong

Explanation:  Aerobic respiration needs oxygen