Miller carried out a control experiment without the electrical discharge and found no organic compounds. What might explain this result?

The incidence of smoking during pregnancy varied by age and race, the researchers also discovered. Women aged 20 to 24 had the highest prevalence rate (10.7%), followed by those aged 15 to 19 (8.5%) and 25 to 29 (8.2%).

Smoking during pregnant can harm the developing fetus' tissues, especially the lungs and brain, and some studies have found a connection between mother smoking and cleft lip.

The two main justifications for smoking throughout pregnancy were addiction and mood regulation (e.g., to unwind, settle down, enjoy, or get out of boredom). If pregnant women felt depressed, they were more likely to smoke.

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The two features of the eco-friendly home illustrated will be insulation and solar panels.

For Insulation:

Year 1: 20% reduction in energy consumption for heating and cooling

Year 2: 40% reduction in energy consumption for heating and cooling

Year 3: 60% reduction in energy consumption for heating and cooling

Year 4: 80% reduction in energy consumption for heating and cooling

Year 5: 100% reduction in energy consumption for heating and cooling.

For Solar panels:

Year 1: 500 KW/h of electricity generated by solar panels

Year 2: 1000 KW/h of electricity generated by solar panels

Year 3: 1500 KW/h of electricity generated by solar panels

Year 4: 2000 KW/h of electricity generated by solar panels

Year 5: 2500 KW/h of electricity generated by solar panels

This illustrates the simulation.

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RNA primers are short pieces of RNA that are used as a starting point for DNA replication.

During the process of DNA replication, an enzyme called DNA polymerase attaches to the DNA and begins to add nucleotides to the strand, forming two identical strands. However, DNA polymerase cannot attach itself directly to the DNA and must use an RNA primer to start the process. All living things require primers, which are brief single-stranded nucleic acids, to start the production of DNA.The RNA primer binds to the DNA, allowing DNA polymerase to attach and begin the replication process. RNA primers are taken out and replaced with DNA nucleotides when replication is finished.

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Answer:

Explanation:12werffdew

Answer:

1.A number of genes have been positively associated with the skin pigmentation difference between European and non-European populations. Mutations in SLC24A5 and SLC45A2 are believed to account for the bulk of this variation and show very strong signs of selection.

2.Cancer can circumvent negative selective pressures due to its ability to accumulate mutations that cause genetic diversity in tumor cells as the cells proliferate. Cancer seems to have evolved a propensity for, or at the very least, a selection for fitness.

3.Folate levels decrease depending on sun exposure, study says. 05 Feb 2019 --- Folate levels decrease during the months when solar radiation is higher and ultraviolet radiation proportionately affects folate levels in the blood.

Explanation:

Answer:

an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner layer being folded inward to form layers (cristae).

Explanation:

The function of amniotic fluid is protects the embryo against being jostled by movements.

The function of amniotic fluid includes the following:

1. Protects the embryo against being jostled by movements: The amniotic fluid protects the developing fetus from jolts and injuries due to its fluidic environment. As a result, if the mother experiences a fall or sudden movement, the fetus will be shielded by the amniotic fluid, which will absorb the shock. The amniotic fluid maintains a stable temperature, ensuring that the fetus is comfortable and healthy.

2. Absorbs wastes the fetus excretes: The amniotic fluid serves as a waste disposal system for the developing fetus, absorbing and carrying away all of the waste products that the fetus generates. The fetus urinates the fluid into the amniotic sac, and the amniotic fluid carries it away.Apart from these, the amniotic fluid plays a crucial role in fetal development by protecting the developing fetus from physical injury and infection. It also keeps the temperature stable and provides an excellent environment for the fetus to grow and develop healthily.

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Answer:

The balanced equarion is

4Fe + 3O2-------> 2(Fe2O3).

Explanation:

Answer:

Pharynx

Explanation:

The throat, or pharynx, its bassically a tube that is muscilar, and is a passageway for like, food, liquids and air!

The organisms in the food train which are predators include:

This referred to an animal which preys on other organisms in the ecosystem and belong to consumers.

In the food train, the animals listed above are consumers and prey on different types of organisms.

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The types of inheritance include:

1) SINGLE INHERITANCE : A child/derived class is derived from only one parent/base class.

EXAMPLE : Dog Class inherits the Animal class.

2) MULTIPLE INHERITANCE : A child/derived class is derived from more than one parent/base class.

EXAMPLE : A class Bat is derived from base classes Mammal and WingedAnimal.

3) HIERARCHICAL INHERITANCE : More than one child classes are derived from single class.

EXAMPLE : Physics, Chemistry and MAths are derived from Science Class.

4) MULTILEVEL INHERITANCE : A derived/child class is derived from a parent class which is derived from a single parent class.

EXAMPLE : Babydog inherits the Dog class which again inherits the animal class.

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Answer:

In biological system, cell is known as the basic unit of all organisms. Unicellular organism consist of one cell only but that single cell helps them to perform all the functional activity.

Levels of organization in biological systems is defined as the hierarchy of several components from smallest to complex in biological system.  

Cell is one of the important part of Levels of organization in biological systems, as in multicellular organisms group of cells form tissue that create an organ and many organs together form organ system within an organism. The cell is basic unit in all organisms and without a cell, an organism can not develop.

The group of these organism formed from a small cell then form complex component of Levels of organization such as population, community, ecosystem and Biosphere (in sequential order).

Answer:

Undoubtedly, Red Blood Cells are the ones carrying the most oxygen.

Answer:

In Late 1600s Anton von Leeuwenhoek develops a more powerful microscope that allows him to see living cells like bacteria.

In Early 1800s Matthias Schleiden and Theodor Schwann conclude that all living organisms are made of cells, and that cells can be produced from other cells.

Explanation:

Answer:

Interphase is when cell grows, replacing it chromosomes while preparing for cell division.

Mitosis - copies its chromosomes and then segregates them, generating two identical nuclei.

Cytokinesis - the cytoplasm splits in half to make two new cells.

Answer:

A

Explanation:

Answer:

Ecological succession.

Explanation:

Ecological succession occurs in this scenario because the area is changing again to its original or starting stage due to change in its environmental conditions. Those plants that needs large amount of water will vanished and those plants that needs less water will take the place of that plants. This phenomenon also occur with other animals that living in that ecosystem.

Answer:

Breathing in and eating food

Explanation:

To sum it up easily is the reactants for cellular resperation is glucose (sugar) and Oxygen. First we get oxygen from breathing (Obviously). Second we get glucose from eating foods.

The pharynx is where the air and food channels intersect. Air may enter the pharynx via breathing, which always occurs through the mouth or nose. The transition from an airway to a food channel occurs during swallowing. Thus, option D is correct.

The oxygen you breathe is used by your body cells to convert the food you consume into energy. It is known as cellular respiration.

The cell uses oxygen during cellular respiration to metabolize sugar. The energy your body need is created when sugar is broken down.

That implies that you must use more effort to breathe in enough of it when eating. Your lungs and diaphragm are crammed by the food in your stomach, which makes it tougher for them to do their jobs.

Therefore, breathing in air and eating food activities provide the reactants for cellular respiration.

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Answer:

AAT=TTA

GGC=CCG

TAC=ATG

Explanation:

Hope this helps!

Please mark me as Brainlinieast.

Answer:

kerosene oil

coconut oil

farm oil

vegetable oil

Explanation:

Los fósiles se forman a través de varios tipos de fosilización: mineralización, carbonización, momificación, y fundición y moldes. El proceso más común es el de mineralización, en el que los minerales de aguas subterráneas se filtran en las partes duras del organismo, como huesos y conchas, y los petrifican o los convierten en piedra.

Answer:

The creatures developed in silurian period have evolved to live in sea bottoms.

Explanation:

Answer:

yes if they were physically capable

Answer:

Well i'm not going to tell you the answer but i can help

Explanation:

You have to use this picture and make a argument about these parts of dog they list what are there major movement like how they move

Answer: Initiation, elongation, and termination. In order to fit within a cell's nucleus, DNA is packed into tightly coiled structures called chromatin, which loosens prior to replication, allowing the cell replication machinery to access the DNA strands

Explanation:

The digestive system maintains homeostasis by ensuring that the stomach environment has the right pH balance.

The body uses both positive and negative mechanisms to carry on homeostasis. When the body catches an imbalance, the various systems work together to counteract and restore correct equilibrium. The bacterial flora in the intestines is crucial to homeostasis in the body. They not only break down food so the nutrients can be absorbed.

In the digestive system, homeostasis is attained by a series of procedures controlled by various organs and tissues. The digestive system maintains homeostasis by creating the proper pH balance in the gastric environment. In addition, by continuing the correct enzyme ratio.

So we can conclude that The actuation of the digestive system enzyme pepsin is an example of a positive feedback mechanism

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Food poisoning would cause an intense dehydration and upset of the homeostatic process of the body.

In the digestive system, homeostasis refers to the maintenance of a stable internal environment in response to external changes, such as the ingestion of food. When food poisoning occurs, the body's normal homeostatic processes are disrupted.

However, if the food poisoning is severe, the body may not be able to effectively restore homeostasis, leading to dehydration and other complications. In these cases, medical intervention may be necessary to help the body regain its normal balance.

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Answer and Explanation:

The founder effect is a special case of genetic drift.

The Founder effect refers to the consequences that occur from the origin of a new population produced by a small number of founder individuals that come from an ancestral bigger population. The new population originated from a few founder individuals, who came from a bigger population and that established in a new environment.

This small population might or might not be genetically representative of the original one. It might show poor genetic variation and hence, a high possibility of expressing a peculiar allelic composition. Some rare alleles might be in exceed or might be completely lost. Consequently, when the small population increases in size, it will have a genetically different composition from the original one. In these situations, genetic variability is reduced and there is a high possibility of developing a peculiar allelic composition. If the number of individuals that originates the new population is very low, the founder effect will be very extreme, because the magnitude of this change is inversely related to the original number of the founder individuals. These changes produced by genetic drift accumulate in time, and eventually, some alleles get lost, while some other might set.      

There are certain examples of the founder effect, such as Huntington's disease in South Africa or the Ellis syndrome characteristic of the Amish people from Pennsylvania.

Answer:

Prokaryotic cells are cells without a nucleus.

Eukaryotic cells are cells that contain a nucleus.

Explanation:

Answer:

The cell which is well developed and have nuclear membrane is called eukaryotic cell whereas the cell which is under-developed and lacks nuclear membrane is called prokaryotic cell.

The codon is a triplet of nucleotide bases in an RNA chain that code for amino acids during the process of translation.

During translation, the tRNA reads the mRNA sequence in triplet of nucleotides which is called as codon which is then used to decipher the amino acid to be added in the polypeptide chain.

As there are 20 amino acids, there is a redundancy of the codons, that is, many codons can code for one amino acid.

There is one codon that is always present at the beginning of the RNA which is called the start codon which is AUG. It initiates the translation process.

At the end of the RNA sequence is the stop codon which is UAA, UAG or UGA which bring the translation process to an end.

The codons given correspond to the following amino acids:

1. AUG - Methionine

2. GAA - Glutamic acid

3. CGG - Arginine

4. UGA - Stop codon

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