identifying technological advancement

Complete question:

You want to study the effect of agriculture run-off on the rate of antibiotic-resistant bacteria in ponds. You gather samples from ponds surrounded by high-density livestock areas and from ponds at least ten miles from agriculture activities. You grow the bacteria on plates and test how resistant they are to antibiotics. Based on this experiment, the proximity of the pond to agriculture would be best categorized as what?

Answer:

2. the independent variable

Explanation:

During an experiment, data from an experimental group is compared with the data from a control group. Both groups are selected from the same pool or population, so they are identical in all aspects except for the independent variables.  

The election of a control group is essential in an experiment. Its principal purpose is to allow the discrimination of the results obtained by the treatment in the study, from the results that might be a consequence of other factors. The control group does not receive any treatments. It is used to identify any other factors influencing the results obtained in the study, apart from the modified variables of the treatment.  

The experimental group is the one that receives the experimental procedure or treatment. The researcher voluntarily changes the independent variables in the experimental group to observe how they affect the group under study. These variables are kept constant in the control group, not influencing the results, while the experimental group receives the treatment. There can be several experimental groups.

Independent (manipulated) variable: Refers to all the variables in an experiment that provoke a response in another variable. An independent variable is the one that changes or is controlled and modified in the experiment to analyze how another variable responds to it. It changes to analyze its effects on the dependent variable. Usually, the independent variable is represented by the X letter.

Dependent variable: Refers to the variable that depends and reacts to any change in the independent variable. It represents a quantity of something which value depends on how the independent variable is modified. This change might be proportional or inversely proportional to the change in the manipulated variable. It is usually identified by the letter Y.

The hypothesis is a conjecture. The researcher hypothesizes in order to predict what is going on or what is expected to occur. A hypothesis is a claim of how it works a relation between two or more variables. Usually, it is written in the present time.    

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The proximity of the pond to agriculture might be considered as an independent variable.

The researcher chooses ponds according to their distance from the crops. In the exposed example, the researcher chose a pond is surrounded by high-density livestock areas and another one at least ten miles away.

The magnitude of run-off might depend on how far the pond is from the crops.

Answer:

ecosystem

Explanation:

That is the definition of ecology.

The main function of a leaf is to produce food for the plant by photosynthesis. Chlorophyll, the substance that gives plants their characteristic green colour, absorbs light energy. The internal structure of the leaf is protected by the leaf epidermis, which is continuous with the stem epidermis.

Conifer Leaf.  

Microphyll Leaf.  

Megaphyll Leaf.

A leaf is an above-ground plant organ and it is green. Its main functions are photosynthesis and gas exchange. A leaf is often flat, so it absorbs the most light, and thin, so that the sunlight can get to the chloroplasts in the cells. Most leaves have stomata, which open and close.

The two main functions performed by the leaf are photosynthesis and transpiration. Photosynthesis is the process by which green plants make their food from carbon dioxide and water in the presence of sunlight.

~Answer~

~Absorb carbon dioxide~

~Perform Photosynthesis~

~Release oxygen~

~Yw~

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~Emmi~

Answer:

Synthesis, DNA helicase, topoisomerase, leading strand, lagging strand, DNA polymerase, nucleotides, primase, lagging strand, nucleotide, DNA ligase

Explanation:

During the process of DNA replication, the whole molecule gets copied in the synthesis or S phase of the cell cycle. The DNA strands are separated by the enzyme helicase while topoisomerase keeps it from overwinding. The 2 strands are copied differently. The leading strand is made continuously, while the lagging strand is synthesized in small sequences called Okazaki fragments. The main enzyme involved in DNA replication is DNA polymerase. This enzyme can only add nucleotides to an existing strand, so short sequences of nucleotides (primer) made by the enzyme primase are needed for the process of elongation. In the lagging strand, the enzyme DNA polymerase one removes the short tj sequences and fills the gaps, while DNA ligase joins the fragments.

A Synthesis,

B DNA helicase,

C topoisomerase,

D leading  

E lagging strand

F DNA polymerase

G nucleotides

H primase

I lagging strand

J nucleotide

K DNA ligase

Answer:  

32% population would be heterozygous for this gene.

Explanation:

Due to technical problems, you will find the complete explanation in the attached files

Answer:

Okapi

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okapi...

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Answer:

c) peat is not a fossil fuel because it has biologic origins, making it biofuel

Explanation:

Peat is soil/ turf

When fossil fuels exist burned, they release large quantities of carbon dioxide, a greenhouse gas, into the air. Greenhouse gases trap heat in our atmosphere, pushing global warming.

Fossil fuels exist created from decomposing plants and animals. These fuels exist found in the Earth's crust and include carbon and hydrogen, which can be burned for energy. Coal, oil, and natural gas exist examples of fossil fuels.

A fossil fuel exists as a hydrocarbon-containing material constructed naturally in the earth's crust from the remains of dead plants and animals that exist extracted and burned as a fuel. The primary fossil fuels exist as coal, crude oil, and natural gas.

When fossil fuels exist burned, they release large quantities of carbon dioxide, a greenhouse gas, into the air. Greenhouse gases trap heat in our atmosphere, pushing global warming.

Global warming exists usually directed to human-induced warming of the Earth system, whereas climate change can be direct to natural or anthropogenic change. The two phrases are often used interchangeably.

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Answer:

bronchioles are the structure

plant trees at least every year and keep atmosphere clear

Answer:

a. Her mother has zig-zag antennae.

b. Her brother has zig-zag antennae.

Explanation:

Available data:

Maternal effect: Refers to the influence of the “environment provided by the mother” on the progeny phenotype. The mother´s genotype directly determines the progeny phenotype. Even though the progeny has a different genotype, it is irrelevant, as well as the father´s genotype or phenotype. This means that no matter what is the genotype of the offspring, all of them will express the same phenotype as their mother. The maternal effect is commonly seen in insects and might be seen in some mammals and plants.

So, if a female has zig-zag coils, this means that the mother also has zig-zag antennae and that all the brothers and sisters of this female ant have zig-zag antennae, independently of their genotype.

a. Her mother has zig-zag antennae ⇒ True. The trait is inherited from the mother.  

b. Her brother has zig-zag antennae ⇒ True. The whole progeny will express sig-zag antennae.

c. This female carries the zig-zag allele ⇒ Not necessarily.

d. This female's offspring will have zig-zag antennae ⇒ Depends on it´s genotype

Answer:Bone Marrow

Thymus

Spleen

Explanation:Bone Marrow

Thymus

Spleen

The following are structures of the lymphatic system -

Thus, the following are structures of the lymphatic system -

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Answer:

is that 23% ..

.. according to my knowledge

Answer:

If deforestation is disturbed then the photosynthesis cycle is disturbed, which results in the oxygen cycle being affected. With a decrease in trees, a decrease in photosynthesis occurs, which cause a decline in the oxygen cycle. A decline in the oxygen cycle results in more polluted air.

Explanation:

Without trees, humans would not be able survive because the air would be unsuitable for breathing. Due to deforestation, there would be fewer trees to "clean" the air. Deforestation is the action or process of clearing of forests, or the state of having been cleared of forests.

Trees and plants, in general, produce energy for growth using a process known as photosynthesis. Using light, water and carbon dioxide, a plant produces energy in the form of sugar and releases oxygen into the air.

Deforestation, as well as a rise in the emissions and our global temperature, affects the air that we breathe. This is because all trees take in carbon dioxide and other pollutants which are known to cause a lot of problems in the atmosphere and to humans. This inevitably results in people breathing dirtier and more polluted air that normally wouldn't happen.  

Long-term exposure to polluted air can have permanent health effects such as: Accelerated aging of the lungs. Loss of lung capacity and decreased lung function. Development of diseases such as asthma, bronchitis, emphysema, and possibly cancer.

Trees are responsible for taking the carbon from the atmosphere through photosynthesis in order to make energy. This carbon is then either transferred into oxygen and released into the air by respiration or is stored inside the trees until they decompose into the soil. Therefore, the absence of trees would result in significantly higher amounts of carbon dioxide in the air and lower amounts of oxygen. This bad quality air would also be full of airborne particles and pollutants like carbon monoxide, sulfur dioxide and nitrogen dioxide.

In addition to the decrease of oxygen in the atmosphere, it would allow excessive amounts of carbon dioxide to remain. In the short term, since CO2 is one of the major greenhouse gases, it will undoubtedly lead to higher global temperatures which, in turn, would quicken the melting of the polar ice caps.

Answer:

it would reason that the first sentence is the most evidentiary, since it is fact based verses the second sentence which is theory.

Answer: The mountains are continuously increasing in size. and Periodic earthquakes occur in the region.

Explanation: i literally got my question wrong because i listened to that other guy and he was completely wrong. dont make my mistake and listen to silly people.

Answer:

you can see below

Explanation:

Basic Definitions:

Cell Membrane = the semi-permeable structure that surrounds the cell and keeps all of the cells organelles from exploding everywhere.

Cell Wall = the rigid 'armor' of the cell that surrounds it after the membrane. Usually made up of cellulose and ONLY found in plant cells.

Nucleus = A really dense organelle of the cell usually surrounded by two membranes. They contain and protect your genetic material. Basically everything that makes you, you.

Cytoplasm = The watery, salty, and protein filled 'soup' that fills the cell. All organelles float happily in this.

Now Specific Locations:

Eukaryotic cells

have plasma membranes

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only have cell walls if the cells are plants.

They do have a nucleus.

They have cytoplasm

Prokaryotic cells

have plasma membranes

cell walls are usually chemically complexed.

don't have a nucleus

have cytoplasm

Animal cells

only have the plasma membranes.

No cell wall

have a nucleus

have cytoplasm

Plant cells

have both the cell wall

and have a plasma membrane

have a nucleus

have cytoplasm

Answer:

c

Explanation:

c is the cerebellum

b is the spinal chord

a is parietal lobe

Answer: S-shaped back bo

Explanation: That was the only choice

Answer:

S-shaped back bone

Explanation:

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Answer:

Plzz upload a full picture of ur chapter

Answer:

I. Cell capsule

II. Cell wall

III. Plasma membrane

IV. Nucleoid

V. Cytoplasm

Explanation:

In the structure of bacterium, I represent Cell capsule which is the outer covering of bacterium cell, II is the Cell wall that is located after the cell capsule. III is the Plasma membrane which is also called cell membrane which is the second boundary of cell. IV represents Nucleoid which like nucleus having genetic material, V is Cytoplasm that is responsible for the transportation medium for various nutrients..

Answer:

Cell: All living organisms are made up of cells, which are the basic building components. Cells also carry the body's genetic material and have the ability to replicate themselves. Cells are made up of several components, each of which serves a particular purpose. Organelles, for example, are specialized structures that perform specific activities within the cell.

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Atom: Protons, neutrons, and electrons are the three subatomic particles that make up an atom. The nucleus, which is made up of protons and neutrons, is at the core of the atom, while electrons float around in a tiny cloud above it.

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Answer:

Take two potted plants and provide equal conditions to both.

Explanation:

Two potted plants i.e. one is placed near the nuclear accident site while on the other hand, the other is placed far away from the nuclear accident. Provide equal conditions to both plants so that we can find out the hypothesis that  the frequency of mutations decreases with the organisms distance from the source of radiation. The result shows that the potted plant that is located near to the nuclear accident site having high frequency of mutation as compared to other plant due to the radiation present at that location.

Answer:

a. cell wall

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Answer:

The principle for native gels when Coomassie is not added to the sample is that proteins are separated by a combination of size and charge. The charge in general depends on the number of amino acid residues that bear a positive or negative charge at the pH of the gel. So if running the gel at pH from 8.3 / 8.9, Asp and Glu will be negatively charged, Lys and Arg and His will be protonated and have a positive charge. The N- terminus would have a positive charge while the C terminus would have a negative charge. There might be exceptions depending upon the micro environment of each residue. Native gels can be run at acidic pH as well, to give another way of resolving proteins. Smaller proteins migrate faster than larger proteins. Also, quaternary structure is preserved, so a dimer will run as a dimer so the percentage of total acrylamide monomer used is usually lower than what is used for SDS-PAGE, e.g. 7.5% acrylamide