Structure of the Atom
Directions: Answer the following questions on the lines provided.
1. How is the chemical symbol of an element determined?
2. What are atoms composed of?
How is the chemical symbol of an element determined?

we use 70% of our energy to  maintain our internal function. The answer is option b.

Most of the energy that our body produces is used to maintain the internal functions of the body.

Some of these functions includes:

Some of the other tasks that this energy is used for is work and also exercises.

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Answer:

The correct answer is - they lack a nucleus.

Explanation:

Red blood cells or erythrocytes are anucleated, biconcave, and small specialized cell that produce in bone marrow and lacks the mitochondria at maturity. RBC plays very important role to carry oxygen from lungs to deliver it to the various parts of the body and carry out carbon dioxide from various part to back to the lungs.

Due to lack of the cell organelles and nucleus, these cells are smaller in size. The size of RBC circulate throughout the body through narrow vessels due to its specific size and shape that provide it space for hemoglobin that binds with oxygen.

Thus, the correct answer is - they lack a nucleus.

Answer:

jgjgj

Explanation:

jgjgjjgjjj-

All of the options are chemical approaches to control micro-organism excepts: B Disinfectants

19. The scientific name for modern man is: B. Homo sapiens

20. kingdoms are prokaryotic organisms placed D. Monera

21. Plants which have true roots, leaves, stem & seeds inside the fruit are: B. Angiosperm

22.  taxonomic groups contains closely related organisms A. Genus

23. Malaria causing single-celled parasitic protozoan is called: D. Plasmodium

24. kingdoms consists of eukaryotic organisms such as yeast, molds, and mushrooms A. Kingdom fungi

25. Ecology is a biological science that deals with except: D. none

26. The organism that are consumer is D. Scavengers

Disinfectants are special chemicals that are used to kill germs or prevent them from growing on surfaces or objects. They are not usually used to control microorganisms within living things, unlike antibiotics, antiseptics, and autoclaving, which are all chemicals used to control microorganisms.

Homo sapiens is the fancy name used by scientists to refer to regular, everyday humans This is the species that humans are a part of.

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18. All of the following are chemical approaches to control micro-organism excepts: A. Antibiotics B. Disinfectants

19. The scientific name for modern man is C. Antiseptics D. Autoclaving A. Homo erectus B. Homo sapiens

20. In which of the following kingdoms are prokaryotic organisms placed? A. Fungi B. Protest C. Australopithecus D. None C. Planate D. Monera

21. Plants which have true roots, leaves, stem & seeds inside the fruit are A. Gymnosperm C. Mosses D. Ferns B. Angiosperm

22. Which of the following taxonomic groups contains closely related organisms? A. Genus C. Phylum B. Order D. Class

23. Malaria causing single celled parasitic protozoan is called A. Paramecium B. Salmonella C. Mosquito D. Plasmodium

24. Which one of the following kingdoms is consists of eukaryotic organisms such as yeast moulds and mushrooms? A. Ecosystem B. Population

25. Ecology is a biological science that deals with all of the following except Answer the following questions. C. Kingdom monera D. Kingdom plantae A. Kingdom fungi B. Kingdom protista C. organism D. none​

26. Which of the following organism are consumers? A. Photosynthetic B. Chemosynthetic bacteria C. Green plant D. Scavengers

Indoor air pollutants  can be dangerous because the air pollutants stay in small space rather than circulating throughout the atmosphere. Option C is the correct answer.

It is the gas that is produced by the cow dung and the gas is produced by the various chemical reactions in it.

Building materials pollution can be reduced out by many ways. Here are a few examples:

Low-VOC Paints: Volatile Organic Compounds (VOCs) are chemicals found in many paints, which can emit harmful fumes into the air for years after the paint has dried. Low-VOC paints contain fewer or no harmful chemicals, reducing indoor air pollution and improving air quality.

Air-Purifying Plants: Certain indoor plants, such as peace lilies, spider plants, and Boston ferns, can help remove harmful pollutants from the air. These plants absorb pollutants such as formaldehyde, benzene, and xylene, improving indoor air quality.

Green Roofs: Green roofs are roofs covered in vegetation that can help absorb pollutants from the air, reducing air pollution in urban areas. Green roofs also provide insulation, reducing energy costs, and can help mitigate the urban heat island effect.

Therefore ways like these should be adopted.

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In complete dominance, the presence of at least one dominant allele in the genotype is enougth to express the dominant phenotype. 100% of the offspring will have mutated creased ear, while 0% of the will have normal standing ear.

Complete dominance is the inheritance pattern in which the dominant allele completely masks the recessive allele.

This interaction between alleles is observed in individuals who are heterozygous for a particular gene. They carry both alleles but only express the dominant trait. The dominant allele is hiding the expression of the recessive allele.

In the exposed example,

Cross: a cat that is heterozygous with a cat that is homozygous for the fold allele.

Parentals) Ee   x   EE

Gametes) E   e     E   E

Punnett square)   E    e

                     E    EE    Ee

                     E    EE    Ee

F1) 50% of the progeny is expected to be heterozygous

     50% of the progeny is expected to be homozygous dominant

     100% of the progeny is expected to have ears with a crease.

The expected percents of offspring that will have each characteristic are,

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Answer:

D) Reducing Energy Use

Explanation:

Conserve means to avoid using something wastefully or destructively.

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1) Prospective cohort study. 2) Table below. 3) Relative risk = 2.466. 4) The risk of developing asthma is greater in people exposed to the pesticide than in people not exposed to it. 5) Not knowing other risk factors that could cause asthma.

Prospective and retrospective studies are carried out depending on the aim of the research.

Individuals from the study groups in these cases have already been affected.

Most individuals from the study groups in these cases have not been affected. However, some of them might have been or might have high risks of being affected.

1)

The exposed study case is an example of a prospective cohort study.

It analyzes the connection (relationship) between being exposed to the pesticide and being affected by asthma.

It is carried out to predict if people exposed to pesticides have more chances of developing asthma or not.

2) Data

Pesticide Expossure          Asthmatic        Not Asmathic     Total

Yes                                            69                       249               318

No                                              87                       903               990

Total                                          156                      1152              1308

3) Measures of association

Exposed people

attack rate = affected people with asthma / exposed people

attack rate =  69/318

attack rate = 0.217

Attack rate for peope exposed to pesticide, ARE = 0.217

Not Exposed people

attack rate = affected people with asthma / not exposed people

attack rate =  87/990

attack rate = 0.088

Attack rate for peope not exposed to pesticide, ARNE = 0.088

Being exposed

Relative risk = ARE / ARNE

Relative risk = 0.217 / 0.088

Relative risk = 2.466

4) Interpretation:

In the exposed example, relative risk is greater than 1 (Rr>1)

This means that the risk of developing asthma is greater in people exposed to the pesticide than in people not exposed to it.

Pesticide exposure might be a significant risk factor for asthma development.

5) Weakness of this study design  

A weakness of the study could be that no other risk factor is considered.

There could be another factor affecting people and causing asthma development. This factor could be affecting both groups.      

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Answer:

TRUE

Explanation:

Answer: False

Explanation: To anyone who needs the actual answer, I took the quiz and it said this is the right one.

Answer:

i need help tooooooooooooo

Answer:

The population would increase okay the plants and herbivores would decrease because of the deers and lack of enough food I had to think about it

Explanation:

I don't know the other sorry..

Answer:

A:

Explanation:

Photosynthesis is a chemical process in plants and other primary producers that is integral to energy production. Carbohydrates containing energy is made from light, water and carbon dioxide in the form of glucose molecules.

As a result, the waste product oxygen is released. Photosynthesis is a rate-limited reaction, depending on many factors, including the concentration of carbon dioxide, atmospheric temperature and intensity of light. Because the energy needed is derived from photons, i.e. light particles, lower light intensities lower the rate of photosynthesis significantly.

Answer:

C. All traits of an organism

Here, the hypothesis is "plants communicate with their neighbors in response to stress", dependent variable is the amount of the stress hormone in the plants, and the independent variable is the exposure to stress (applied 3 times a day for 10 days), standardized variables are plants used, duration of the stressor, amount of stress hormone. The control group is the plant that is not exposed to stressor.

Here, the control group is the group of plants that are not exposed to stress, and the control groups plants are experimented or tested with the other plants to get the result of the stress hormone on the plants.

Hence, here, the hypothesis is "plants communicate with their neighbors in response to stress", dependent variable is the amount of the stress hormone in the plants, and the independent variable is the exposure to stress (applied 3 times a day for 10 days), standardized variables are plants used, duration of the stressor, amount of stress hormone. The control group is the plant that is not exposed to stressor.

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Answer:

"Felsic minerals have the lowest melting points (600 to 750 °C) and mafic minerals have higher melting points (1000 to 1200 °C). Bowen's Reaction Series can be thought of as an idealized order of crystallization of a cooling magma."

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Answer:

A non-example of coastal wetland would be a mountain range, desert, or urban area. Coastal wetlands refer to a specific type of ecosystem that is located in the intertidal zone, where land meets the sea and is characterized by wet and marshy areas.

Carbohydrates are used for short term energy. It also stores energy.

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Function of carbohydrates

Carbohydrates provide fuel for the central nervous system and energy for working muscles. They also prevent protein from being used as an energy source and enable fat metabolism, according to Iowa State University. Also, "carbohydrates are important for brain function," Smathers said.

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Answer:

Lack of nutrients in our body causes disorders / diseases in our body and those diseases are deficiency diseases. For example scurvy is caused by lack of vitamin C.

Populations in Hardy-Weinberg equilibrium express the same allelic and genotypic frequencies through generations. Number of individuals expressing each phenotype: 63 sheep S^AS^A, 84 sheep S^AS^B, 28 sheep S^BS^B.

The Hardy-Weinberg equilibrium theory states that allelic and genotypic frequencies in populations that is in equilibrium remain the same through generations. No evolutive forces are acting on these populations, so no evolution occurs.

Assuming a diallelic gene,

Allelic frequencies

Genotypic frequencies

The addition of the allelic frequencies equals 1

p + q = 1.

The sum of genotypic frequencies equals 1

p² + 2pq + q² = 1

In the exposed example,

Alleles          Frequencies

Genotypes

We need to get the number of animals expressing each genotype and phenotype. To do it, we just need to use allelic frequencies and calculate  genotypic frequencies (p², 2pq, and q²), and then multiply these values by the total number of animals (N = 175).

Genotypic and Phenotypic frequencies

F(S^AS^A) = p² = 0.6² = 0.36

F(S^AS^B) = 2pq = 2 x 0.6 x 0.4 = 0.48

F(S^BS^B) = q² = 0.4² = 0.16

Number of individuals expressing each phenotype

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Complete question

A single gene with two alleles control variation in haemoglobin type in sheep. There are three different phenotypes corresponding to genotypes

In a flock of 175 sheep the frequency of allele S^A was found to be 0.6 and frequency of allele S^B WAS found to be 0.4.

Using the hardy weinberg equation calculate the number of sheep with each phenotypes in the flock show your working

Answer:

1. The Diet Pills

2. The Height Of the plants

3. The plant being watered with tap water

4. 8 Trials were included

Explanation:

1. An independent variable is the variable that you change

2. The dependent variable is what you are measuring, in this example the height of the plant

3. This is what you use to base your conclusion on. In this test they are seeing if diet pills affect the height of the plants. So a plant with no diet pill is the control

4. The results were taken at the end of the week for EIGHT weeks. 8 Trials.

Explanation:

4. formed by extreme heat and pressure

1. formed underground

Answer: Formed underground

Formed by extreme heat and pressure

Explanation:

In both  plant and animal cells, energy for cellular functions is produced by the mitochondria.

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According to the image the correct order of figures as per the steps is the starting to the ending step. 2,4,3 and 1 is the order of the image that is being presented in the picture.

T stands for thymus in T cell.

T cell activation is a key event in the adaptive immune response and vital to the generation of both cellular and humoral immunity.

Primary T cell activation is  involving the integration of three distinct signals delivered in sequence:

 Anti- gen recognition

Costimulation

Cytokine- mediated differentiation and expansion.

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Carrier proteins moving from low to high concentration requires the use of energy to transport substances. This is called active transport and uses transmembrane proteins, pumps and vesicles, which is cell membrane.

Active transport is the type of transport where molecules are transported using energy. This energy can be in the form of ATP or the energy released during co-transport. In active transport, the solute is transported against the concentration gradient, i.e., from lower to higher concentration.

Vesicles are the single membranous self-made structures. These are actually small spherical buds formed due to the pinching off of the cell membrane. They are actively involved in transport across various organelles of the cell.

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Answer:

5 because those organisms multipliy or expand

Answer:

The correct answer is - yes, multiple exits but a minimum of 2 is a must.

Explanation:

An emergency escape plan is a documented map or plan of a building that is created for the safe evacuation in an emergency such as fire, smoke, natural disaster, or any panic situation.

In an emergency escape plan, there must be easy exits for faster and safe evacuation even in low visibility or smoke condition. Multiple exit routes are allowed to any escape plans, however, two is the minimum number of exits is compulsory.

Yes, there are exits alloted for emergency escape plans. It should be multiple in number but a minimum of 2 must be necessary.

An emergency escape plan is the urgent immediate egress or escape of people away from an area that contains an imminent threat of destruction, an ongoing threat, or a hazard to lives or property.

An emergency escape plan provides a path for the people of a particular area to move away from the risky or threatened places immediately. So, emergency exits play a significant role when there is any natural disaster, fire, smoke, etc. has occurred.  

Therefore, there are exits alloted for emergency escape plans. It should be multiple in number but a minimum of 2 must be mandatory.

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If Bb is crossed with bb, the resulting offspring will be 50% Bb and 50% bb. It will have a 1:1 black to white phenotypic ratio.

Answer - B. 1:1 black to white

Answer:

Bonded to meteorites that hit the Earth

Explanation:

The origin of water on Earth is being linked to the existence of very old meteorites that have been found on Earth. The "Carbonaceous chondrites," which are meteorites, have a similar content to that of seawater. Its isotope levels for hydrogen and nitrogen are similar with Earth's seawater. They're believed to have come from the outer asteroid belt and later on delivered water to Earth after collision.