Answer:
Water is a "polar" molecule, meaning that there is an uneven distribution of electron density. Water has a partial negative charge (Delta-) near the oxygen atom due the unshared pairs of electrons, and partial positive charges (Delta-) near the hydrogen atom.Water molecules are polar because it determines the bent shape of the molecule in which the partial negatively charged atoms are covalently bounded to the partial positively charged hydrogen atoms.
What are the other characteristics of water molecules?The other characteristics of water molecules are as follows:
It acts as a universal solvent.It has a high heat of vaporization and high specific heat.Its solid form is less dense as compared to its liquid form.It illustrates other properties like cohesion and adhesion.The distribution of charge is determined by the fact that the oxygen atom attracts electrons a bit more strongly than the hydrogen atom. This is due to the unequal sharing of electrons between the two different atoms.
This unequal sharing of electrons is responsible for obtaining a slight negative charge near the oxygen atom, while a slight positive charge near the hydrogen atom.
Therefore, it is well described above.
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what would be the affect on pcr reaction, if primers are not added in the reaction?
Answer:
In absence of the primer the reaction lacks a primer template junction, and thus a free 3′-hydroxyl group will cause the reaction to fail.
Explanation:
In the PCR reactions primers are used to bind to ssDNA template hybridize itself and define the segment or part of the sample that will be amplified. This hybridize template makes the primer template junction.
If primers not added this junction would not be created then the enzyme DNA polymerase cannot make new DNA due to there is no free 3′-hydroxyl group which is essential to bind with the first deoxynucleotide.
Thus, In absence of the primer the reaction lacks a primer template junction, and thus a free 3′-hydroxyl group will cause the reaction to fail.
What process does the grass use to harness this energy? *
Which of the following is incorrectly matched? Please choose the correct answer from the following choices, and then select the submit answer button. molecular biology: examination of life at the level of atoms and compounds comparative anatomy: growth, development, and body structures of major groups of organisms laboratory and field studies: implementation of the scientific method to observe and study evolution fossil record: physical evidence of organisms from the past biogeography: patterns in geographic distribution of organisms
Answer:molecular biology: examination of life at the level of atoms and compounds
Explanation:
Molecular biology deals with the study of living things at molecules level
this is what controls them and make them up.
Molecular biology is a branch of biochemistry that deals with molecules which are specifically connected to living processes.
molecular biology requires the genetic material of an organism which is the nucleic acids (Deoxyribonucleic acid and Ribonucleic acid) and the proteins that are formed using the genetic instructions encoded in those molecules.
Other information are well matched
On your laboratory test, you are presented with a mollusc that has a closed circulatory system. You know immediately that it must belong to the class ________.
Answer:
Cephalopoda
Explanation:
Cephalopods are the mollusk that has a closed circulatory system by simple circulation. The heart is located in the pericardic cavity and it is divided into two auricles and one ventricle. From the ventricle, the anterior aorta goes forward the head and the posterior aorta goes forward the visceral mass. The anterior aorta branches into many branchial arteries. All of them get united again in the head, in one cava vein from where the blood returns to the posterior extreme. This vein introduces into the pericardic cavity and brunches into two renal veins near the nephridium. Each branch penetrates into a nephridial sac and passes through the muscular branchial heart before it enters the gills. Blood passes from the ventricle to the branchia through many vessels. In the branchia, the blood gets oxygenated again and returns to the auricle. The posterior aorta irrigates the gonads and the mantle, and from the posterior extreme of the body, blood goes forward to the anterior body region through two veins that join the renal veins that flow into gill hearts.
What part of the body reproduces, grows, repairs itself, uses oxygen and nutrients, digests food, eliminates waste, produces heat and energy, and is able to move around
Answer:
A Human Cell
Explanation:
A Human Cell can do many things. All your organs, hair, skin, and muscle tissue are all made up of cells. Each human cell from a different part of your body can do and create different things. For example, the cells duplicate (which is reproduction), when it duplicates, it grows. It also uses the oxygen and nutrients for cellular respiration, when it takes in the oxygen and nutrients, it turns it into ATP, which is used to help your cells function. There are many other ways the human cell may relate to the question above. But here are some of the ways a human cell can be all those things.
Carbon dioxide is A a toxic gas produced by landfills. B produced by plants during photosynthesis. C needed by industry to power generators. D a greenhouse gas that traps heat in the atmosphere.
Answer:
The correct answer is option D, that is, a greenhouse gas that traps heat in the atmosphere.
Explanation:
A natural phenomenon in which the atmospheric gases captivates heat and permits Earth to retain enough solar energy to be livable is termed as the greenhouse effect. The greenhouse gases are the methane, carbon dioxide, nitrous oxide, and other gases, which gathers in the atmosphere and produces a heat-reflective layer that helps in trapping sunlight and keeps the Earth warm.
Of these greenhouse gases, carbon dioxide is the largest contributor to climate change. It is largely emitted at the time of burning fossil fuels like natural gas, oil, and other carbon-rich sources. Due to this, the level of carbon dioxide increases in the atmosphere resulting in the global phenomenon termed global warming.
The basic unit of length in the interaction system of units is
Answer:
metre
Explanation:
Basic Units:
metre length
second time
kilogram. mass
ampere electric current
Which of the following heart block dysrhythmias is identified by a repetitious prolonging PR interval pattern after each blocked QRS complex
a) first degree heart block
b) second degree heart block type I
c) second degree heart block type II
d) third degree heart block
Answer: Option A.
first degree heart block
Explanation:
First degree atrioventricular block is a condition that is associated with electrical condition system of the heart in which the electrical impulses is conducted from the cardiac atria to the ventricles via atrioventricular node in a slow manner compare to the normal transmission.
It is first degree great block because it is characterized by prolong PR interval on an electrocardiogram (ECG) to more than 200 msec and atrial impulse is transfered to the ventricles, which lead to regular ventricular rate.
The PR interval of the surface ECG is measured from the start of atrial depolarization (P wave) to the commensement of ventricular depolarization or QRS complex.
Nucleic acids and proteins both
contain which element as one of
their main elements?
А
Nitrogen
B
Iron
Answer: A. Nitrogen
Explanation: Nucleic acids contain the same elements as proteins: carbon, hydrogen, oxygen, nitrogen; plus phosphorous (C, H, O, N, and P). Nucleic acids are very large macromolecules composed of repetitive units of the same building blocks, nucleotides, similar to a pearl necklace made of many pearls.
How did the “Father of Anatomy” contribute to the study of the human body?
Answer:
Andreas Vesalius became first to study human anatomy.
Explanation:
Andreas Vesalius wrote a book called Seven Chapters on the Structure of the Human Body that caused to the rise of advanced human anatomy. His work became very notable for medicine because it gave physicians a thorough knowledge of human anatomy, and it propelled them to examine the claims of ancient medical experts, which were unusual than Vesalius hypotheses. He's seen as a Renaissance figure of the 16th Century and considered being the father of modern medicine.
In order for something to be falsifiable, it needs to be…
a. false itself
b. able to be proven false
c. proven or disproven in court
d. all of the above
Answer:
D all of the above
Explanation:
HELP ASAP! Gretchen wants to run a test to discover whether glass, copper, wood, or plastic conduct electricity. She sets up a circuit connecting a battery to a light bulb, with a small gap she will use to test the conductivity of the different substances. One at a time, she connects the circuit with the chosen test material, and records whether or not the light bulb comes on Is this a good experimental design? Answer choices: Yes,because all of the materials gave the results she predicted No,Since we dont know the results No,because she is testing to many things Yes,Because she is only changing one piece of experiment
Answer:
Yes because she is only changing one part of the experiment.
Consider this plant cell. The organelles in a plant cell are labeled. Part G is the middle layer of the cell. Which organelle is labeled G? cytoplasm cell wall cell membrane vacuole
Answer:
cell membrane
Explanation:
jus took the test on edg
Answer:
c
Explanation:
A toy car is placed at 0 on a number line. It moves 9 cm to the left, then 4 cm to the right, and then 6 cm to the left. What is the total distance the toy car traveled? 1 cm 5 cm 11 cm 19 cm
Answer:
19 cm
Explanation:
The total distance traveled by the toy cay would be 19 cm.
The total distance traveled should not be mistaken for total displacement. While displacement measures the distance and direction from the starting position of the toy car relative to its final position, the total distance traveled is calculated by adding all the movements of the toy car together. Hence;
Total distance traveled = 9 + 4 + 6 = 19 cm
The total distance the toy car traveled is 19cm
Distance measures how far a body or an object has moved no matter the direction has taken (either positive or negative)
For the toy car that is placed at 0 on a number line, the toy moved the following distance:
9 cm to the left4 cm to the right6 cm to the left.Total distance = Total distances to the left + total distance to the right
Total distance = 9cm + 6cm + 4cm
Total distance = 19cm
Hence the total distance the toy car traveled is 19cm
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The part of a cell which contain chromosomes?
Answer: the nucleus contains chromosomes.
Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Hope that helps!
The shoulder is
to the chest.
Medial
Proximal
Lateral
Distal
Answer:
Explanation:eeeeeeh mesi
Mosquito repellent is sprayed on one arm and the other arm is not sprayed. The number
of mosquito bites is counted after 2 hours.
o the independent variable is the 2 hour time and the dependent variable is the number of
mosquito bites
o the independent variable is the number of mosquito bites and the dependent variable is the
repellant
the independent variable is the repellant and the dependent variable is the 2 hour time
the independent variable is the repellant and the dependent variable is the number of mosquito
bites
Answer:
Dependent variable: Number of bug bites
Independent variable: Sprayed arm
Control group: Arm not sprayed.
Experimental group: Sprayed arm
Explanation:
If you know the definitions for the independent variable, dependent variable, control and experimental group in a problem than it would be less complicated to figure out what they are in any given example. So, here are the definitions:
Independent variable: the factor that you change
Dependent variable: the factor that is measured
Control group: the factor that is kept the same
Experimental group: the group in an experiment that receives the variable being tested
I had this had a question about this last week and got stumped im sure if this will help you? but I do hope it does and im sure exactly what the entire question is so.... Good Luck!
Is it science -I’m 100 percent safe from lightning in my house
Answer:
Incorrect
Explanation:
Lighting is very powerful, just feeling the vibration may shock you.
Answer:
Incorrect
Explanation:
Think of the meaning of the word inferior and then write a sentence using that anatomical term.
Answer: Bacterial infections are inferior to viruses.
Answer:
the foot is inferior to the knee
Explanation:
inferior means to be below
Please help!
Choose from the following list the three genotypes the parents must have in order for a daughter to have X b X b
X B X B
X B X b
XY
X b X b
X B Y B
X b Y b
X b Y
Answer:XB Xb
Explanation:
XB Xb ×XB Xb=
XB XB,XB Xb,Xb XB,Xb Xb
Part F
How does the design of your experiment control for outside factors that may affect the results?
Answer:
Outside factors are not always constant meaning that there is little way to control them.
Explanation:
Answer:
Here is one possible answer:
The seeds will all be planted at the same time and provided with the same amount of light and water. Three trials of the experiment will be conducted to improve the accuracy of the results.
Explanation:
Plato / Sample Answer
the diagram in model 1 illustrates a clipping of an aquatic plant in water.
a. what process is occurring in the plant's cells to produce the gas in the bubbles that appear?
b. what gas is the plant producing?
c. what source of energy is the plant using to conduct the process recorded in part a?
Answer:
a. Photosynthesis
b. Oxygen
c. Light from the lamp
Explanation:
a. The process that is occurring in the plant's cell to produce the gas in the bubble is photosynthesis. The process involves the use of inorganic substances such as carbon dioxide and water in the presence of light to manufacture carbohydrates. Oxygen is evolved in the process. The equation for the process is as below:
[tex]6 CO_2 + 6 H_2O + light --> C_6H_1_2O_6 + 6 O_2[/tex]
b. The gas produced by the plant is oxygen as shown in the equation above.
c. The source of energy the plant is using to conduct the process is the light from the lamp. Light catalyzes the excitation of photosystems, causing the release of electrons that causes the splitting of water.
What is true about the three animals a wolf,a dog,and a fox have? A. They share a common ancestor. B. They're unrelated to each other. C. They're extinct. D. They're all the product of artificial selection.
Answer:
A
Explanation:
Because all wolves.................................
What are the three basic parts of the cell theory?
Answer:
What are the three basic parts of the cell theory?
Cells are the basic units of composition for living things.All living things are composed of cells.All cells come from pre-existing cells.1. The manipulated variable was the
A number of flies.
B time in days.
C difference in time per group.
D size of the containers.
A patient visits their doctor because they are having trouble digesting complex carbohydrates. The doctor learns that her patient runs 5-10 miles 5 days a week and drinks very little water. The doctor suggested (before doing any major testing) that the patient begin drinking plenty of water each day. The patient visits the doctor a week later and has no problems with digestion. Why did the doctor suggest such a simple change in habit for her patient?
Answer:
porque el paciente corre una gran distancia pero no toma mucha agua, lo que hace que este se deshidrate, entonces al cambiarlo este se hidrataría mejor ayudando a su condición fisisca
Explanation:
por eso
What interactions are occurring that allow the water to move against gravity in capillary action? Select three options.
Answer:
Adhesion and surface tension
Explanation:
Capillary action is the tendency of a liquid to rise or fall in a narrow tube. Two main terms are required to explain capillary action; adhesion and cohesion.
Cohesion is the force of attraction between molecules of the same kind while adhesion is the force of attraction between molecules of different kinds.
Forces of adhesion causes water to move up in a capillary tube. The water is held as it rises by surface tension forces acting on the circumference of the meniscus. The water keeps rising in the tube until the weight of the water drawn up in the tube balances the surface tension acting at the top column of the water.
Which of the following sustainable farming practices allows farmers to rely on their own water supply, rather than bringing in water from different locations? using wells crop rotation drip irrigation using insecticide
Answer:
drip irrigation
Explanation:
The correct answer would be drip irrigation.
It is a small scale irrigation system that is usually set up to minimize water usage compared to other forms of irrigations. The system consists of different pipes that start from the water source and networks to the stands of plants. Control valves also exist and these ensure that water slowly drips directly to the root of plants. The drip could be either from the above or below the ground surface.
Due to the efficiency associated with dripping water directly to the root of plants which is where it is primarily needed, the drip irrigation system requires minimal water supply and is sustainable.
Answer:
D.) Using wells
Explanation:
Learning goal 1: What is the process in all living cells that releases
the energy stored in sugar molecules?
Cellular respiration
Photosynthesis
Decomposition
Recycling
Cellular respiration is the process in all living cells that releases the energy stored in sugar molecules.
Additional information:-Aerobic respiration : The respiration which uses oxygen is called aerobic respiration.
Aerobic respiration produces a considerable amount of energy ( 38 ATP ) .The end products in aerobic respiration are carbon dioxide and water .Do Now: Why do people have different shades/colors of skin?
Answer:
People have different skin colors mainly because their melanocytes produce different amount and kinds of melanin. The genetic mechanism behind human skin color is mainly regulated by the enzyme tyrosinase, which creates the color of the skin, eyes, and hair shades.
Explanation:
Answer:
People have different skin colors mainly because their melanocytes produce different amount and kinds of melanin.