HURRY PLEASE HELP!!! Which statement best explains why calcium is less
reactive than potassium?
A. Potassium is softer than calcium
B. Calcium has the same number of neutrons as potassium
C. Calcium has one more proton than potassium
D. Potassium has only one valence electron while calcium has two
Answers
Answer:
Help me I help you
Explanation:
Related Questions
A certain type of lens changes the direction of light rays from A to B. What property does
this illustrate?
A. refraction
B. polarization
C. diffraction
D. reflection
E. deflection
Answers
The correct option is B. polarization. A particular kind of lens known as a Polarized lens alters the path of light rays point A to point b B.
Define the term Polarized lens?In order to improve eyesight and eye safety outdoors, polarized lenses are a sort of treated lenses intended to reduce glare as well as eye strain.
Outdoor glare is lessened with polarized sunglasses because they have been chemically altered to block part light from getting through the lenses. For people who spend a lot of time outdoors, polarized prescriptive sunglasses might be a smart option because they better block out strong light that causes eye strain than normal sunglasses.Before reaching a target, light must pass through two polarizing filters, and if the filters are 90 degrees apart, the target will not get any light. Light would reach the target if a 3rd filter is inserted between the initial two, angled at a 45° angle.Thus, A particular kind of lens known as a Polarized lens alters the path of light rays point A to point b B.
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which process produce the gaseous by-product oxygen?
Answers
Oxygen is the gaseous by product released in the photosynthesis process.
The two essential biological processes that take place in plants are photosynthesis and respiration. The two processes that have been explored in the question are photosynthesis and respiration. Carbon dioxide is fixed to produce glucose and oxygen is liberated during photosynthesis.
Photosynthesis chemical equation:
6CO 2→12H 2O→C 6 H 12 O 6 +6H 2O+6O 2
↑
The oxygen from this reaction is fixed for respiration and glucose is broken down for the release of energy.
Respiration chemical equation:
C 6 H 12O 6+6O 2 →6CO 2 +6H 2
O+Energy↑
Oxygen released during photosynthesis will be used in respiration.
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what drug is alcohol considered
Answers
the meaning of photosynthesis in paragraph
Answers
Photosynthesis is a biological process that occurs in plants, algae, and some bacteria. It is the process by which these organisms convert light energy from the sun into chemical energy in the form of glucose (a type of sugar).
Which of the following statements about the sympathetic nervous system is true?
Answers
Answer:
best known for its role in responding to dangerous or stressful situations. In these situations, your sympathetic nervous system activates to speed up your heart rate, deliver more blood to areas of your body that need more oxygen or other responses to help your get out of danger.
Explanation:
Which of the following does the frog represent? A. Primary producer B. Primary consumer C. Secondary consumer D. Decomposer
Answers
Answer:
Primary Consumer
Explanation:
Because it eat directly from the plants, which are primary producers
True or False: it is believed that hyper sanitation may lead to an allergy epidemic.
Answers
It is believed that hyper sanitation may lead to allergy epidemic : True.
Why does hyper sanitation causes an allergy epidemic?There is a hypothesis known as the hygiene hypothesis, which suggests that increased cleanliness and reduced exposure to certain microbes and parasites in childhood can cause overactive immune system and increased risk of developing allergies and autoimmune diseases later in life.
While the exact mechanisms are still being studied, some researchers believe that excessive use of antibiotics and disinfectants and lack of exposure to microbes and parasites, may be contributing factors to the rise in allergies and autoimmune diseases in the recent decades. It is important to note that this is still a developing area of research and more studies are needed to fully understand relationship between hygiene and allergies.
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3
Which of the following statements are true? Choose more than one
answer.
Oxygen is the most abundant gas in Earth's atmosphere
Gases in the stratosphere protect living organisms from solar
radiation
Wavelength affects the color of light
Gases are thicker in the upper levels of the atmosphere
Not all wavelengths of light are scattered by atmospheric
gases
Earth's atmosphere absorbs blue light most efficiently
Answers
Answer:
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Explanation:wfnwkfnskfnds
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
what do you call the very fine particles that you formed after pounding the pieces of rocks with a hammer
Answers
Answer:
fine particles (silt and clay) are moved to areas of still water (off-shore settings). the majority of these particles are made up of clay minerals, which are weathering products of feldspars and ferro-magnesian minerals.
Answer:
You call them minerals
Explanation:
how do oxbow lakes form
Answers
Answer:
It starts with a bend in a river then the river erodes the bend until it goes through the bend and the old bend keeps its water and becomes a lake
Answer:
here you go
Explanation:
when you get a meander the lake slowly erodes from the inside, because water will always want to take the faster route( which would be straight ) the lake will slowly cute off the meander while dumping the rivers load forming an oxbow lake
Drag each label to the correct location on the image. Not all labels will be used.
Match the labels with the symbols on the weather map.
cold front
warm front
low pressure
strong winds,
cloudless
strong winds,
very cloudy
high pressure
occluded front
I need help now please!
Answers
About the question:
You will find the map in the attached files
Answer:
Cold front → blue line/trianglesWarm front → red line/semicircles Occluded front → lines with triangles and semicircles Low pressure → LHigh pressure → H Strong winds, cloudless → White key Strong winds, very cloudy → Black filled keyExplanation:
ISOBARS:
These are lines that join points of similar pressure and indicate atmospheric pressure for different regions. If lines are very close to each other, means that there will be bad weather. This is because, at a short distance, pressure values change, meaning atmospheric instability.
PRESSURE ZONES:
Isobars indicate the speed and direction of winds. Winds move from high atmospheric pressure areas to lower atmospheric pressure areas. When isobars are placed as small circles, there is a letter indicating the pressure center. It can be either high pressure symbolized with an H, or low pressure symbolized with an L.
High-pressure zones, H, represent anticyclones and are associated with good weather.Low-pressure zones, L, represent cyclones and are associated with bad weather. The closer the lines are to each other, the stronger will be the winds.FRONT TYPES:
There are different types of fronts, which can be represented with different symbols.
Cold front: In weather maps, these are represented with blue lines with triangles indicating the direction of the wind movements. Warm front: In weather maps, these are represented with red lines with semicircles indicating the direction of the wind movements. Occluded front: It can be warm or cold. These are represented with purple lines with triangles and semicircles indicating the direction of the wind movements.CLOUD COVER / WIND SPEED:
Indicated as a key figure on the map.
Circle: Represents the percentage of cloud cover. The clouder it is, the more black will be the circle. Stick: Represents the wind speed. The stick can have lines indicating the degree of speed → stick with no transversal line indicates 1-4 mph, one line means 5-8 mph, two lines 9-14 mph. And so on.
Relacione y seleccione los descubrimientos y observaciones siguientes, con el respectivo autor:
Jensen, Hooke y Leeuwenhoek:
A) Protozoos, Celulosa, Microscopio
B) Células de corcho, Microscopio simple, Protozoos
C) Microscopio, Celdillas, Ameba
D) Microscopio simple, Células de corcho, Protozoos
E) Protozoos, Células de corcho, Microscopio simple
Answers
Relacione y seleccione los descubrimientos y observaciones siguientes, con el respectivo autor:
Microscopio simple, Células de corcho, Protozoos.
Anton van Leeuwenhoek :Using microscopes he made from basic lenses, Anton van Leeuwenhoek was the first to see protozoa. In addition to free-living protozoa, he also described various parasitic species from animals and Giardia lamblia from his own faeces between the years 1674 and 1716.
Zacharias Janssen :The usage of a microscope, a discovery that dates back to the late 16th century and a modest Dutch eyeglass manufacturer named Zacharias Janssen, has helped every major branch of science.
Hooke :In his book Micrographia, Hooke described his observations of this tiny, previously unobserved universe. The cork appeared to him to be formed of minute pores, which he began to refer to as "cells" since they reminded him of monastic cells.
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Explain the relationship between homeostasis and body systems
Answers
Answer:
well its the ability to maintain a steady internal environment
Explanation:
i other words its the body's maintenance crew. if your to hot it tells the sweat glands to get going cooling you down. if your too cold it works on raising your body temp
6.) Water is essential to all living things. Discuss THREE properties of water
(6 points maximum):Name of property and correct description (2 points).
Points MUST provide BOTH property and description. *
Answers
Answer:
Water is essential to all living things because people or animals could die if not eat or drink water everyday like health.
Explanation:
Put these terms in order beginning with the smallest and least organized and ending with the largest and most organized:________.
A. Cell
B. Organism
C. Organelle
D. System
E. Tissue
F. Organ
Answers
The order of the organization is cell, organelle, tissue, organ, organ system, and organism.
What is the level of organization?Levels of organization are innate structures defined by part-whole relationships, with things at higher levels composed of things at lower levels to higher levels.
The order of the organization is cell, organelle, tissue, organ, organ system, and organism.
Thus, above-mentioned is the level or organization of an organism.
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the combination of a heart arteries and veins and capillaries is____
Answers
Answer:
A (an organ system)
Explanation:
This pulley has a mechanical advantage of 1 and does not make work easier has mechanical advantage of 2 and reduces the force needed to lift an object.
Answers
Answer:
The pulley with a mechanical advantage of 1 is called a fixed pulley. It does not provide any mechanical advantage and does not reduce the amount of force required to lift an object. It simply changes the direction of the force applied.
The pulley with a mechanical advantage of 2 is called a movable pulley. It reduces the force needed to lift an object by distributing the load between the force applied and the pulley itself. When using a movable pulley, the force needed to lift the object is half of the weight of the object.
A single pulley, a type of simple machine, has a mechanical advantage of 1 as it only changes the direction of force. Using combinations of pulleys increases the mechanical advantage, meaning the system can multiply forces, which reduces the energy required to lift an object.
Explanation:A pulley is a type of simple machine that serves to change the direction of the force. The mechanical advantage is the ratio of output to input forces for any simple machine. An individual pulley has a mechanical advantage of 1 because it only changes the direction of the force applied and not the force's magnitude. However, when pulleys are combined, as illustrated in Figure 9.27, they serve to multiply force and reduce the effort needed to lift an object.
For example, a pulley system with two cables attached to the load has a mechanical advantage (MA) of approximately 2. This means that the force applied is approximately twice the input force, thus reducing the effort needed to lift an object.
Note that while the machine can reduce the input force, energy is still conserved, and it cannot perform more work than the energy put into it.
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In fruit flies, vestigial wings are recessive to normal wings, and ebony body is recessive to normal body. A cross was made between flies (all true-breeding) with normal wings and normal bodies to flies with vestigial wings and ebony bodies. The F1 offspring were then self-crossed to produce an F2 generation. The following data were obtained (observed):
Category Predicted ratio Observed numbers
normal wings, normal body 9 452
normal wings, ebony body 3 126
vestigial wings, normal body 3 101
vestigial wings, ebony body 1 41
720
Given that we would expect equal proportions of each class of flies after a testcross, test the goodness of fit using a chi-square test. What is the chi-squared value for this set of data?
Answers
Answer:
See the answer below
Explanation:
One will expect the offspring of the F2 generation to phenotypically segregate in 9:3:3:1 according to the Mendelian ratio.
Using the formula for Chi-square:
= \(\frac{(O - E)^2}{E}\) where O = observed frequency and E = expected frequency
Phenotype O E Chi-square
normal wings, normal body 452 9/16 x 720= 405 \(\frac{(452 - 405)^2}{405}\)= 5.45
normal wings, ebony body 126 3/16 x 720= 135 \(\frac{(126 - 135)^2}{135}\)= 0.6
vestigial wings, normal body 101 3/16 x 720= 135 \(\frac{(101 - 135)^2}{135}\)= 8.56
vestigial wings, ebony body 41 1/16 x 720 = 45 \(\frac{(41 - 45)^2}{45}\)= 0.36
Total Chi-square = 5.45+0.6+8.56+0.36
= 14.97
Degree of freedom = 4 - 1 = 3
Critical Chi-square value (alpha = 95%) = 7.81
The calculated Chi-square value (14.97) is more than the critical value (7.81), hence, the outcome of the cross does not fit-in to Mendel's ratio.
The Chi-square value for the data set is 14.97.
Why might the shape of a sickled red blood cell prevent the cell from doing its job? Hint: Think about the function(job) of the red blood cell Use the following Sentence starter: The shape of the sickled red blood cell would prevent the cell from doing its job because_________. *
Answers
Answer:
Normally, the flexible, round red blood cells move easily through blood vessels. In sickle cell anemia, the red blood are shaped like sickles or crescent moons. These rigid, sticky cells can get stuck in small blood vessels, which can slow or block blood flow and oxygen to parts of the body.
Hope this helps :)
Answer:
These rigid, sticky cells can get stuck in small blood vessels, which can slow or block blood flow and oxygen to parts of the body.
Explanation:
Select the photosynthetic molecule that gives halobacteria its unique color.
a.) Caratenoids
b.)Thylakoids
c.)Bacteriochlorophylls
d.)Bacteriorhodopsin
Answers
Answer:
Bacteriorhodopsin
Explanation:
Purple Halobacterium species owe their color to bacteriorhodopsin, a light-sensitive protein.
How would you explain the key concepts for the CWA in less than two minutes?
Answers
Answer:
Explanation:
vPoint Source - a source of water discharged to surface water through a discrete point - generally through a pipe, ditch, or channel.
Nonpoint Source - Nonpoint sources, such as parking lots or athletic fields, discharge runoff water to groundwater or surface water; runoff does not come from a pipe, ditch, or channel. These sources may contain pollutants such as pesticides, motor oil, and soaps.
Navigable Waters of the United States For the purposes of the Clean Water Act, the term "navigable waters" includes:
all waters used in commerce, including groundwater;
all interstate waters including wetlands, mudflats, and sand-flats; and
all other waters such as lakes, rivers, streams, wetlands and sloughs.
EPA policy states, "The majority of facilities in the U.S. have the potential to discharge to navigable waters." The Supreme Court decision in (2006) requires the Army Corps of Engineers and the EPA to determine whether there is a "significant nexus" between a navigable waterway and an area a spill might affect. In June of 2007, EPA and the Army Corps of Engineers released provisional interpretive guidance regarding the "significant nexus” question. According to this guidance, the agencies will assert jurisdiction over traditional navigable waters, wetlands adjacent thereto, and relatively permanent tributaries thereof. The agencies will generally not assert jurisdiction over swales and ditches that lack routine water flow. Finally, the agencies will apply the "significant nexus" requirement and make a case-by-case, fact-specific analysis on impermanent tributaries and other wetlands.
Additional executive orders were issued 2015 in 2019. Under the 2019 proposal, traditional navigable waters, tributaries to those waters, certain ditches, certain lakes and ponds, impoundments of jurisdictional waters, and wetlands adjacent to jurisdictional waters would be federally regulated. It also details what are not "waters of the United States," such as features that only contain water during or in response to rainfall (e.g., ephemeral features); groundwater; many ditches, including most roadside or farm ditches; prior converted cropland; stormwater control features; and waste treatment systems.
Could the requirement for one or more NPDES Discharge Permit apply to my campus?
If your campus discharges pollutants directly to navigable waters of the United States through a point source, you must obtain an NPDES permit or redirect the flow of the waste.
Stormwater releases from certain activities require an NPDES permit. The most common activities on college campuses requiring NPDES permits for stormwater are construction activities disturbing more than 1 acre, hazardous waste storage areas operating under the Resource Conservation and Recovery Act permit system, steam-generating power plants, and airports. See Stormwater section below.
Regulations issued by local water authorities, or Publicly Owned Treatment Works (POTWs), not NPDES permits, govern discharges into sanitary sewer systems. See Sewer Use (POTW) section below for more information about requirements for using POTWs for commercial or industrial waste disposal.
What do I have to do related to NPDES Discharge Permits?
Determine where wastewater flows from buildings and processes on your campus. Any industrial or commercial operation (e.g., ice rink melt pits, floor drains, and vehicle wash stations) that discharge into a water of the United States may require an NPDES permit. If required, you must obtain such a permit from the appropriate regulatory agency, probably your state environmental agency.
French drains, dry wells, and septic system leach fields are different from point source discharges because they do not immediately affect surface water. Some state and federal environmental agencies manage these systems under the Underground Injection Control program, part of the Safe Drinking Water Act. See Safe Drinking Water Act for more information.
Details of NPDES
Which of these factors is involved in earthquake formation?
plates getting larger
rocks breaking
stress that decreases
faults that remain stationary
Answers
Answer:
rocks breaking
Explanation:
Breaking rocks is one the factors that is involved during the formation of an earthquake. As rock breaks, there is a sudden release of energy into the surrounding.
When a rock breaks, it is said to be fractured. Such rock fracturing that involves movement of the earth leads to the formation of earthquake. In this process, there is a sudden burst of seismic waves into the environment. Surface waves will cause the damage on the earth surface. The basis of earthquake formation is ability of rocks to break and release a sudden burst of energy.Answer:
b or rocks breaking
Explanation:
Manuel and three other students are studying the effects of various factors on the growth of plants in a garden. Manuel is asked to investigate the effects of abiotic factors that involve the geosphere. The other three students are investigating effects that involve the biosphere, hydrosphere, and atmosphere.
Which factor would be entirely Manuel's responsibility to investigate?
Answers
The size of the rocks mixed into the garden soil would be entirely Manuel's responsibility to investigate.
What is geosphere?The non-living components of the environment, or abiotic influences, have a significant impact on living things. They may assist in figuring out topics like how tall trees grow, the locations of various animals and plants, and the causes of bird migration.
It begins at the surface and descends all the way to the planet's centre. The geosphere serves as a source of natural resources and a location for food production.
Therefore, The size of the rocks mixed into the garden soil would be entirely Manuel's responsibility to investigate.
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Fill in the blank with the best word to complete the sentence.
The system is a group of proteins in the blood that attack pathogens that enter the body and kill them.
Answers
The complement system is part of the immune system. It is composed of proteins in the blood that detect the pathogens affecting the organism and kill them. The complement system is a group of proteins in the blood that attack pathogens that enter the body and kill them.
What is the complement system?The complement system is a component of the immune system. It is one of the mechanisms activated when pathogenic elements enter the organism.
The complement system is the group of proteins whose main function is to recognize the strange element, and destroy it.
Under normal conditions, the molecules that are part of the complement system are inactivated and freely moving through the blood.
When they recognize the presence of pathogenic cells, they activate and migrate to the infected tissue favoring inflammation and stimulating phagocytosis or stimulating the pathogens' lysis to eliminate them.
Complete sentence,
The complement system is a group of proteins in the blood that attack pathogens that enter the body and kill them.
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i am looking for the answer key to the category 1: cell structure and function biology staar review
Answers
Studying the necessary content, going through lecture notes and textbooks, and working through practise questions and quizzes are the best ways to get ready for an exam.
How do cells work and how do they look?Cells are the essential building components of all living things.There are many billions of cells in a human body. In addition to providing the body with structure, they also absorb nutrients from meals, convert those nutrients into energy, and carry out certain jobs.
Who first identified cells?The cell has a long and interesting history, beginning with Robert Hooke's discovery in 1665 and leading to many of today's scientific discoveries.
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Describe what response the body has once the viruses begin escaping the dead cell.
Answers
what is the tube connecting the ovary to the uterus called
Answers
Answer: Fallopian tube
Explanation:
The fallopian tube is where eggs travel from the ovaries to the uterus
Describe the change that you made that led to the decrease in the size of the greenleaf population. Explain why the change led to a decrease in the greenleaf population size.
(no science option again) someone please answer ASAP
Answers
Populations in an ecosystem can be affected by a variety of things, including habitat change, resource availability, predation, competition, disease, or human activities.
If a change occurs that adversely affects the ability to tolerate or reproduce, the amount of green leaf population may decrease. For example, if habitat is lost due to deforestation, populations of green leafhoppers may lose their preferred food supplies or nesting sites, leading to a decline in population numbers. Similarly, if predation pressure increases, a population may experience increased mortality and poor reproductive success, resulting in a decline in numbers.
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The question In the picture
Answers
Answer:
It is important to recycle because it is one of the simple ways to save our planet. The act of recycling also promotes the trait of not being wasteful and promotes one's creativity, which can further be implemented on other aspects of life. It also let's us control the amount of waste that may be harmful to the environment, and allows us to have a deeper connection with nature, and therefore live a meaningful and clean life.
Explanation:
hope it helps ✌️
Why was Rosa parks jailed
Answers
Answer:
because she refused to sit in the back of the bus in the black section
Answer: For not giving up her seat and moving to the back of the bus.
Explanation:
She refused on principle to surrender her seat because of her race, which was required by the law in Montgomery at the time. Parks was briefly jailed and paid a fine. But she was also a long-time member of the NAACP and highly respected in her community.