1. Which of the following is NOT a major source of freshwater pollution?
A. Human and animal wastes
B. Industrial wastes
C. Wetlands
D. Agricultural chemical
in

2. Pesticides are most likely to be found in runoff from
B. Roads
C. Farm fields
D. Homes
E. Factories

3. What is an estuary?
A. A coastal inlet where fresh and salt water meet.
B. A tropical grassland
C. A river that flows into a larger river
D. A landform with high elevation and high relief.

Hi can y’all help me answer does just started 6th grade .. I will give you brainlest plz help

Answer: The options are not given, here are the options.

a. located in the space outside the nucleus.

b. spread evenly throughout an atom. c. concentrated at multiple sites in an atom.

d. concentrated in the center of an atom.

The correct option is D.

concentrated in the center of an atom.

Explanation:

In an atomic model, the atomic particles has the nucleus which is located at the center of the particle. This nucleus contain positive charge which is called proton at the center and the neutrons(no charge). The electrons is located out side the particle she'll or nucleus and atomic particles become neutral because the number of protons is equal to the number of electrons which is negatively charge orbiting outside the nucleus.

Answer:

Oxygen cycles keeps the flow of oxygen at a constant rate.

Explanation:

Answer:

A.)     The net effects of the reactions of photosynthesis and cellular respiration are the opposite of one another, therefore the products of one are the reactants of the other, creating a cycle.

Explanation:  Hope this helps!!

Answer:

I belive it is a solution

Explanation: Hope this helped :D :3

Answer: ✅

Solution

Explanation: ✅

An example of a simple suspension would be flour in water, or sand in water. A colloid is a type of mixture intermediate between a homogeneous mixture (also called a solution) and a heterogeneous mixture with properties also intermediate between the two.

IamSugarBee

During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose.

Answer: prokaryotic cells

Explanation:

Answer: Prokaryotes are organisms whose cells lack a nucleus and other organelles.

Explanation:

Answer:Kidney

Explanation:

The Excretory system is responsible for the elimination of wastes produced by homeostasis. There are several parts of the body that are involved in this process, such as sweat glands, the liver, the lungs and the kidney system.

An organs Kidney, ureter, urinary bladder and urethra are part of the excretory systems.

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Answer:

Lysosome

Explanation:

Answer:

rodents

Explanation:

they arent any of those things

Answer: DNA and ribosomes

Explanation:

DNA is the genetic material of the cell and it is found In all living cells. Ribosomes are small, non-membrane bound organelle that is found in ALL cells and cell types.

Answer:

I would say the trees would die out

Explanation:

I didn't write a hypothesis

Answer:

Substitution Mutations

Explanation: A substitution mutation occurs when specific bases (A, T, C or G) in a gene are swapped for different ones. This type of mutation doesn't cause a difference in the number of bases like insertion or deletion mutations do. Substitution mutations just switch out one or more bases for different ones.

Hope this helps :3

A substitution mutation occurs when a base in the DNA sequence is replaced by a different base.

Substitution is a type of mutation in which one nucleotide is replaced by a different nucleotide. The term can also refer to the replacement of one amino acid in a protein with a different amino acid.

Base substitutions are the simplest type of gene-level mutation, and they involve the swapping of one nucleotide for another during DNA replication. For example, during replication, a thymine nucleotide might be inserted in place of a guanine nucleotide.

Substitution mutations can be good, bad, or have no effect. They cause three specific types of point mutation: silent, missense, and nonsense mutations.

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Answer:

Prior to the buildup of oxygen, organisms were mainly anaerobic and used mechanisms where no oxygen was present or needed. Once the buildup of oxygen starting occurring, organisms were forced to either evolve to survive or they would die off due to the presence of oxygen. The organisms needed to evolve so that they could use and benefit from the abundance of oxygen. The presence of oxygen is a huge evolutionary milestone that kick started the evolution of many new species. Organisms began to metabolize and perform all of its functions with oxygen present.

Explanation:

The origin and importance of the buildup of free oxygen in the atmosphere for the evolution of animal life as the Prior to the buildup of oxygen, organisms were mainly anaerobic and used mechanisms where no oxygen was present or needed.

The importance of oxygen as once the buildup of oxygen starting occurring, organisms were forced to either evolve to survive or they would die off due to the presence of oxygen. The organisms needed to evolve so that they could use and benefit from the abundance of oxygen. The presence of oxygen is a huge evolutionary milestone that kick started the evolution of many new species. Organisms began to metabolize and perform all of its functions with oxygen present.

The origin and importance of the buildup of free oxygen in the atmosphere for the evolution of animal life as the Prior to the buildup of oxygen, he organisms needed to evolve so that they could use and benefit from the abundance of oxygen. The presence of oxygen is a huge evolutionary milestone that kick started the evolution of many new species.

Therefore, The origin and importance of the buildup of free oxygen in the atmosphere for the evolution of animal life as the Prior to the buildup of oxygen, organisms were mainly anaerobic and used mechanisms where no oxygen was present or needed.

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Answer:

The nucleus (plural, nuclei) houses the cell's genetic material, or DNA, and is also the site of synthesis for ribosomes, the cellular machines that assemble proteins.

The scientists that played a significant role in developing the cell theory are Theodor Schwann and Matthias Schleiden. Thus, the correct options are B and E.

Cell theory was proposed by a German botanist M.J. Schleiden and a German zoologist T. Schwann. According to them, the cell theory states that:

Charles Darwin was popular in the field of evolution. Hence, he is referred to as the father of evolution. Robert Hook was known in order to discover a cell in 1665.

Later in 1855, the cell theory is further refined by German biologist R. Virchow. According to him, all cells are arising from pre-existing cells.

Therefore, the scientists that played a significant role in developing the cell theory are Theodor Schwann and Matthias Schleiden. Thus, the correct options are B and E.

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Answer:

B

Explanation:

Experiment tools and methods were not as precise as they are now. Since tech has evolved so has the ways to look at atoms meaning that they will see new and different things.

This atomic model has changed over time. Scientists used the model to make predictions. Sometimes the results of their experiments were a surprise and they did not fit with the existing model. Scientists changed the model so that it could explain the new evidence. And  Because more experiments gave more data, theories and models for atoms changed to be more accurate over time.

Answer: b

Answer:

your core muscles and legs muscles would get tired after a prolonged period of time. this goes for other exercises as well, not just wall sits.

Explanation:

Answer:

According to the levels of organization in the body, the level of organization in which proteins, like collagen, are found is the molecular level, allowing the structural support and the performance of other essential functions.

Explanation:

Proteins are biological macromolecules, polymers of units called amino acids. These molecules belong to the molecular level of organization in living organisms.

The level of organization where proteins are found allows them:

Other functions of proteins are to integrate the cell membranes and perform transport function, to form receptors and to be an energy reserve.

Answer:

Why you looking down here, he clearly got it right    : )

Answer:

A

Explanation:

Answer:

d.) Ribosome

Explanation:

Ribosomes are different from other organelles because they have no membrane around them that separates them from other organelles.

Answer:

[tex]\boxed {\tt 16 \ m/s}[/tex]

Explanation:

Speed can be found by dividing distance by time.

[tex]s=\frac{d}{t}[/tex]

The rabbit travels 80 meters in 5 seconds.

The distance is 80 meters and the time is 5 seconds.

[tex]d= 80 \ m \\t- 5 \ s[/tex]

Substitute the values into the formula.

[tex]s=\frac{80 \ m }{5 \ s}[/tex]

Divide.

[tex]s= 16 \ m/s[/tex]

The rabbit's speed is 16 meters per second.

Answer:

Cow dung helps in balancing the environment and kills germs

Explanation:

Cow dung is used for fertility of the soil. It is also used for the control of pest in the plants. When heated cow dung can be used to cook food where there are lack of wood available. Also when it is heated it releases the gases which kills germs present in the air.

Answer:

The cow eats plants and produces carbon dioxide through cellular respiration. The plants, which gain energy from the sun, then take carbon dioxide from the atmosphere and use it in photosynthesis.

Explanation:

I did the test

Answer:

The answer is that a job of the skeletal system is to protect organs. Hope this helps! :)

Explanation:

The job of the skeletal system is to protect organs, provide support for the body, facilitate movement, produce blood cells, and store and release minerals and fat.

The skeletal system is the framework of the body, consisting of bones, cartilage, and other connective tissues. It provides a strong and stable structure for the body and protects vital organs such as the brain, heart, and lungs. The skeletal system also enables movement, as it works with muscles to allow for locomotion and other bodily functions. Additionally, the skeletal system produces blood cells, stores minerals, and helps regulate the body's pH balance.

The skeletal system provides the body with structural support, and protection of internal organs, and helps in movement by serving as a site for muscle attachment. It also functions in producing blood cells, storing minerals such as calcium and phosphorus, and facilitating communication between different parts of the body through hormones.

Therefore, the correct answer is C) to protect organs.

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Answer:

Black bears feeding niche is quite varied. A black bear eats all sorts of plants and plant material, nuts, all sorts of berries and meat. They have long sharp claws which help them rake the soil to find food and roots. Almost eighty percent of their diet consist of plant material while the rest is animal protein.

Explanation:

b. seasonal temperature changes.

bc tornados, floods, and forest fires do a lot of damage.

Respuesta:

La respuesta correcta es la C, ya que II, III y IV son correctas.

Explicación:

Nuestro sistema inmunológico nos defiende de agentes patógenos que pueden enfermarnos, y está compuesto por dos tipos distintos de inmunidades: la inmunidad innata y la inmunidad adaptativa.

La inmunidad innata es aquella que reacciona primero cuando se presenta una amenaza, atacando a los patógenos de manera inespecífica gracias a mecanismos que ya existían antes de que se desarrolle la infección. Cuando se trata de inmunidad innata, nuestras principales barreras de defensa son la piel y las mucosas, y las células de la respuesta inmune de mayor relevancia son los neutrófilos, entre otras.

Por el contrario, la inmunidad adaptativa, es de respuesta tardía y puede actuar de maneras diferentes dependiendo de cuál sea el patógeno invasor. Hay dos tipos de inmunidad adaptativa, la humoral y la celular. De la inmunidad humoral participan principalmente los linfocitos B, que fabrican anticuerpos específicos; mientras que la inmunidad celular es llevada a cabo por linfocitos T. La ventaja que tiene la inmunidad adaptativa en comparación con la innata es que es específica, diversa, más eficaz, y POSEE MEMORIA.

Las células de la inmunidad adaptativa presentan la capacidad de "recordar" cómo el cuerpo actuó ante una amenaza en el pasado para poder llevar a cabo un plan mucho más eficaz. Esta es la razón por la que las vacunas funcionan: porque se le inyecta a los individuos una versión débil del patógeno (por ejemplo, del virus que causa la varicela) para que el cuerpo "aprenda" a vencerlo para cuando se encuentre con ese microorganismo en un futuro.

Answer:

The reason for the Ostriches way of being like this with the adaptions of strong legs and increased weight and it being flightless bird are because of the environment they live in where the air is to dangerous and also of the predators that live in their environment. It is flightless and is because of the environment it lives in causing them to have to change and adapt and is the reason why they are not like other birds that can fly and why they have such strong legs instead.

Explanation:hope this helps

Ostriches have evolved unique traits to survive in their environment, which is primarily characterized by vast open spaces and arid landscapes.

Ostriches are native to the African savannas and deserts, where they have adapted to cope with the challenges of their environment. Their long, muscular legs allow them to cover large distances efficiently, making them well-suited for evading predators and finding food and water in the expansive and often unforgiving landscapes they inhabit.

Ostriches have evolved differently from typical flying birds, as their wings have become reduced in size. While they cannot fly, their wings serve as important stabilizers during running and courtship displays. These adaptations are a response to the selective pressures of their environment, where flight is less advantageous compared to running.  

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Answer

Nt= 698.65

Explanation:

Due to technical problems, the complete explanation for the answer is as an attached file.