What process describes how pollen is produced and moved during plant reproduction?
After pollen is produced by the pistil, it is moved down the stamen and received by the ovule.
The ovule receives the pollen produced by the stamen and sends it to the pistil.
The stigma receives pollen produced by the stamen and sends it down the pistil to the ovule.
The pistil produces pollen and sends it up to stigma for the ovule to receive.
Answers
The process that describes how pollen is produced and moved during plant reproduction is:
The stigma receives pollen produced by the stamen and sends it down the pistil to the ovule.
This process is called pollination, and it is essential for the fertilization of plants. Pollen is produced by the anthers, which are located at the top of the stamen. The stigma, which is located at the top of the pistil, is designed to receive the pollen. When the pollen comes into contact with the stigma, it begins to grow a pollen tube, which grows down through the style (the middle part of the pistil) and into the ovary, where the ovules are located. Once the pollen tube reaches the ovule, fertilization can occur, resulting in the production of seeds.
Answer: this stigma receives pollen produced by the Sturman, and sends it down the pistil to the ovule.
Explanation:
because, the stamen is the male, and the male produces pollen, so the answer is the stigma received pollen produced by the stamina, and sends it down the pistol to the ovule.
Related Questions
. Suppose that 9 good fuses and 4 defective ones have been mixed up. To find the defective fuses, we test them one-by-one, at random. What is the probability that we are lucky and find both of the defective fuses in the first two tests
Answers
Suppose that 9 good fuses and 4 defective ones have been mixed up. The defective fuses, we test them one-by-one, at random. The probability that we are lucky and find both of the defective fuses in the first two tests is 1/13.
We can use the concept of probability. There are 13 fuses in total, and we are looking for a specific order of the first two being defective. For the first test, the probability of selecting a defective fuse is 4/13 (since there are 4 defective fuses and 13 total fuses). Once we have found one defective fuse, there are now 3 defective fuses remaining and a total of 12 fuses. For the second test, the probability of selecting another defective fuse is 3/12, which can be simplified to 1/4.
To find the probability of both events happening consecutively, we multiply the probabilities of each individual event: (4/13) * (1/4) = 4/52, which simplifies to 1/13. So, the probability of finding both defective fuses in the first two tests when there are 9 good fuses and 4 defective ones is 1/13.
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For the equilibrium that exists in an aqueous solution of nitrous acid (HNO2, a weak acid), the equilibrium constant expression is:
A) K= [H+][NO2-] / [HNO2]
B) K=
C) K = [H+][NO2-]
D) K=
E) none of these
Answers
Equilibrium constant for the following reaction= (A) K= [H+][NO2-] / [HNO2]
The equilibrium constant, represented by the symbol K, is a measure of the extent to which a chemical reaction will proceed to reach equilibrium. It is defined as the ratio of the product concentrations to the reactant concentrations, each raised to the power of their respective stoichiometric coefficients, at equilibrium.
The equilibrium that exists in an aqueous solution of nitrous acid (HNO2) can be represented by the following equation:
HNO2 (aq) ⇌ H+ (aq) + NO2- (aq)
The equilibrium constant expression for this reaction is given by:
K = [H+][NO2-] / [HNO2]
So, the correct answer is:
A) K= [H+][NO2-] / [HNO2]
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Which one of these is not a pathogen?
a. parasite
b. plant
c. protozoa
d. bacteria
Answers
A pathogen is a bacterium, virus, or other microorganisms that can cause disease. A plant does cause a disease
the law of definite proportions was first stated by
a. lavoisier
b. galileo
c. proust
d. dalton
Answers
Answer:
C.proust
Explanation:
Proust's law of definite proportions.
The law of definite proportions was first put forward by the French chemist Joseph Louis Proust in 1779. The discovery that mass was always conserved in chemical reactions was soon followed by the law of definite proportions, which states that a given chemical compound always contains the same elements in the same proportions by mass.
The law of constant proportions is often referred to as Proust’s law of definite proportions.For example, in a nitrogen dioxide (NO2 ) molecule, the ratio of the number of nitrogen and oxygen atoms is 1:2, but the mass ratio is 14:32 (or 7:16).For example, pure water will always contain hydrogen and oxygen in a fixed mass ratio (a gram of water consists of approximately 0.11 grams of hydrogen and 0.88 grams of oxygen, the ratio is 1:8).━━━━━━━━━━━━━━━━━━━━━
Las lineas verticales que constituyen la regla de la lluvia se conoce como
Answers
Answer:
Lines of longitude
Explanation:
Lines of direction and lines of longitude are horizontally and vertically lines, respectively.
The phrases vertical and horizontal are frequently used to define directions: a vertical line runs up and down, whereas a horizontal line crosses.
How many grams of NaCl are in 100 g solution with water; when the solution is 19% NaCl by weight. 17 grams 23 grams 3 grams 19 grams Balance the following chemical reaction equation:
___SO2 + ___O2 -> ___SO3
The numbers listed below will be in order of the blanks listed. 2,1,1
1,3,1
2,1,2
2,2,2
What is the density of gasoline if 23.7 Liters has a mass of 20.2 Kg? (Make sure correct significant figures are used) 1.17 Kg/L 0.740 Kg/L 1.1733 L/Kg 0.7 kg/L
Answers
To calculate the grams of NaCl in a 100 g solution with water, when the solution is 19% NaCl by weight, we can use the formula:
Grams of NaCl = Total weight of solution (in grams) × Percentage of NaCl / 100
In this case, the total weight of the solution is 100 g and the percentage of NaCl is 19%. Plugging in these values:
Grams of NaCl = 100 g × 19 / 100 = 19 grams
Therefore, there are 19 grams of NaCl in the 100 g solution.
Regarding the chemical reaction equation, to balance it, we can use the coefficients to adjust the number of atoms on each side.
The equation is: ___SO2 + ___O2 -> ___SO3
The correct balanced equation is: 2SO2 + O2 -> 2SO3
The coefficients in this balanced equation indicate that we need 2 molecules of SO2, 1 molecule of O2, and 2 molecules of SO3 to balance the reaction.
B. To calculate the density of a substance, we use the formula:
Density = Mass / Volume
In this case, the mass of the gasoline is given as 20.2 kg and the volume is given as 23.7 liters.
Density = 20.2 kg / 23.7 L
Calculating this:
Density = 0.851 Kg/L
Rounding this value to the correct significant figures gives:
Density = 0.85 Kg/L
Therefore, the density of gasoline is approximately 0.85 kg/L.
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the half life of a given radioactive isotope is 5 minutes how many grams of 48 gram sample would remain after 20 minutes have elapsed?
Answers
Answer:
3
Explanation:
the half life of a radioactive isotope is the amount of time one half of the isotope takes to decay
after 5 minutes the mass will be 24
after 10 minutes the mass will be 12
after 15 minutes the mass will be 6
after 20 minutes the mass will be 3
La longitud de enlace del Bi—I experimental en el triyoduro de bismuto, BiI3, es 2.81 Å. De acuerdo con este valor y con los datos de la figura 7.7, prediga el radio atómico del Bi
Answers
Answer:
1,42 Å
Explanation:
La longitud de enlace de Bi-I se obtiene por
Bi-I = Radio del átomo de Bi + Radio del átomo de yodo
pero radio del átomo de yodo = 1.39Å
Longitud del enlace Bi-I = 2,81 Å
Por lo tanto, el radio del átomo de Bi = 2,81 Å - 1,39 Å
radio del átomo de Bi = 1,42 Å
A 0.630 g sample of the ore is completely dissolved in concentrated hno3(aq). the mixture is diluted with water to a final volume of 50.00 ml. assume that all the cobalt in the ore sample is converted to co2+(aq).
(a) what is the [co2+] in the solution if the absorbance of the sample of the solution is 0.74?
(b) calculate the number of moles of co2+(aq) in the 50.00 ml solution.
(c) calculate the mass percent of co in the 0.630 g sample of the ore.
Answers
Co²⁺ is the colored species in the solution, The number of moles of Co²⁺ in the 50.00 mL solution is 0.0212 M, and the ore sample contains 9.92% Co by mass.
To determine the concentration of Co²⁺ in the solution, we need to use Beer's Law, which relates the concentration of a colored species to the absorbance of a solution: A = ɛbc
where A is the absorbance, ɛ is the molar absorptivity (a constant that depends on the substance and the wavelength of light used), b is the path length of the sample (usually 1 cm), and c is the concentration of the colored species.
In this case, Co²⁺ is the colored species, and we are given the absorbance (A) and the path length (b = 1 cm). We need to determine the concentration of Co²⁺ (c) in the solution.
From the problem statement, we know that all of the Co in the ore sample is converted to Co²⁺. Therefore, the number of moles of CO²⁺ in the solution is equal to the number of moles of Co in the ore sample. We can calculate the number of moles of Co from the mass of the ore sample and the percent composition of Co in the ore.
The number of moles of Co²⁺ in the 50.00 mL solution is:
moles of Co²⁺ = moles of Co = (0.630 g Co / 100 g ore) x (1 mole Co / 58.933 g Co) = 0.00106 mol Co2+
Since the final volume of the solution is 50.00 mL, the concentration of Co²⁺ is;
[Co²⁺] = moles of Co²⁺ / volume of solution = 0.00106 mol / 0.05000 L = 0.0212 M
To calculate the mass percent of Co in the ore sample, we need to know the mass of Co in the sample and the total mass of the sample.
From part (b), we know that there are 0.00106 moles of Co in the sample. The molar mass of Co is 58.933 g/mol, so the mass of Co in the sample is:
mass of Co = 0.00106 mol Co x 58.933 g Co/mol = 0.0626 g Co
The mass percent of Co in the ore sample is:
mass percent Co = (mass of Co / mass of ore) x 100% = (0.0626 g / 0.630 g) x 100% = 9.92%
Therefore, the ore sample contains 9.92% Co by mass.
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How could Thomson's atomic model explain the differences between element?
Answers
Thomson proposed that the atom was made up of a diffuse positive charge with minuscule, dispersed negatively charged electrons. There were no additional elements added to Thomson's updated model of the atom that would have allowed scientists to distinguish between various types of elements.
What is the atomic theory?The scientific idea that matter is made up of tiny units called atoms is known as the "atomic theory." Atomism, a prehistoric philosophical movement, is where the atomic theory's roots can be found.
Atomic models are models used to describe the structure of atoms.
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The neutron got its name because which of the following is true?
a. it neutralizes protons
b. it neutralizes electrons
c. it does not have an electrical charge
d. it has no effect on any atomic properties
Answers
The correct answer is: c. The neutron got its name because It does not have an electrical charge.
The neutron is a subatomic particle, symbol n or n⁰ , which has a neutral charge, and a mass slightly greater than that of a proton. Protons and neutrons constitute the nuclei of atoms.
Neutrons are subatomic particles that reside in the nucleus of an atom and have a neutral charge. Unlike protons, which carry a positive charge, and electrons, which carry a negative charge, neutrons do not possess any electrical charge.
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one meter is one hundred centimeters long. if you have a candy bar that is 15 cm long, how long is it in meters?
Answers
explain
Whats the equation and answer
Answers
Answer:
\(distance = speed \: \times time\)
D = S × T
Explanation:
\(distance = 3.5 \times 5 \\ = 17.5 \: m\)
How do you think global water distribution could be affected if the human population increases and there are more people using this resource? Explain what you think might happen.
Answers
If the human population continues to increase, it is likely that the demand for freshwater resources will also increase, which could have a significant impact on global water distribution. As more people use freshwater resources for drinking, sanitation, agriculture, and industrial purposes, there may be greater competition for limited water supplies.
One potential consequence of this increased demand could be that some regions experience water scarcity, while others have an abundance of water. This could lead to conflicts over water resources, as countries and communities compete for access to freshwater sources. In addition, as demand for freshwater increases, there may be a greater risk of pollution and degradation of freshwater resources, further exacerbating water scarcity and potentially affecting the health and wellbeing of communities that rely on these resources.
To address these challenges, it will be important to prioritize sustainable water management practices, including water conservation, watershed protection, and water recycling. This may involve investing in infrastructure to improve water distribution and storage, as well as promoting policies that encourage more efficient water use. Additionally, greater cooperation and coordination between countries and communities will be essential to ensure that water resources are shared fairly and sustainably.
Overall, as the human population continues to grow, it will be critical to prioritize the responsible management and conservation of freshwater resources to ensure that they are available to meet the needs of current and future generations.
Answer:
As the human population continues to increase, the demand for freshwater resources will also rise. With more people using water, the global water distribution could be affected in several ways:
Water scarcity: As the demand for water increases, there could be a shortage of freshwater resources, leading to water scarcity in certain regions. This could have a significant impact on agriculture, energy production, and human health.
Water pollution: With more people using water resources, the chances of water pollution could also increase. Pollution can come from various sources, including industrial waste, agricultural runoff, and sewage. The contamination of freshwater resources can affect the availability of safe drinking water.
Conflict over water resources: Water is a precious resource, and as its scarcity increases, there is a risk of conflict over its distribution. This could lead to tensions between countries or even within countries, as people compete for access to freshwater resources.
Increased pressure on water infrastructure: As the demand for water increases, there will be increased pressure on water infrastructure, including dams, pipelines, and treatment plants. This could lead to issues such as inadequate water supply, water leaks, and higher water bills.
To mitigate these potential problems, it is essential to manage water resources sustainably. This includes reducing water waste, promoting water conservation, investing in water infrastructure, and using water resources efficiently. It is also important to prioritize the needs of vulnerable communities and ensure that everyone has access to safe drinking water.
Tpr (temperature, pressure, and relief) valves must be set to discharge at a temperature no higher than ________
Answers
Tpr (temperature, pressure, and relief) valves must be set to discharge at a temperature no higher than 210°F.
What is temperature?Temperature can simply be defined as the degree of hotness or coldness of a body.
The instrument used for measuring temperature is thermometer
So therefore, Tpr (temperature, pressure, and relief) valves must be set to discharge at a temperature no higher than 210°F
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the term used to denote concentration of electrolytes in a given volume is
Answers
The term used to denote the concentration of electrolytes in a given volume is "molarity".
Molarity-
Molarity is the number of moles of solute dissolved in one liter of the solution. Molarity is the most widely used concentration metric in chemistry, and it is frequently denoted by "M." It denotes the amount of solute in moles per liter of solution.
A solution's molarity can be calculated using the following formula:
Molarity = moles of solute / liters of solution
Molarity is often used to express the concentration of a solution's electrolytes because electrolytes break into ions when dissolved in a solvent, allowing for electrical conductivity.
Molarity can be used in other applications, such as stoichiometry, which involves determining how much of one compound is required to react completely with another.
Molarity is a useful tool for solving problems that involve chemical reactions since the number of moles of a substance is frequently used to establish reaction ratios, limit reactants, and determine the theoretical yield.
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Areas of Earth that are covered with copious amounts of water are part of
this sphere?
Biosphere
Geosphere
Hydrosphere
Monosphere
Answers
Answer:
Hydrosphere
Explanation:
Hydro meaning water
Select the correct answer.
in a grassland, the number of antelopes increased from 200 to 400. Antelopes are grass-eating animals. How will this change directly affect the
ecosystem?
O A. There will be fewer producers in the area.
• B. There will be an increase of other grass-eating animals.
O C. There will be no decomposers in the area.
O D. There will be fewer predators in the area.
Answers
Answer: A. There will be fewer producers in that area.
Explanation: Answer A is correct because all plants, including grass, is a producer. Since there is an increase in grass eating animals (Antelope), more grass will be consumed, decreasing the amount of grass aka producer.
Please help me answer this it’s due today. I will give brainliest
Answers
Answer: X should represent H, hydrogen.
Explanation:
The H is the only one that hasnt been stated in the left side of the formula. H has three atoms as well.
how many grams of sodium hydroxide are required to prepare a 200 ml solution of a 10% (weight per volume) solution
Answers
3.60 grams of sodium hydroxide are required.
Calculation :
given molarity and volume of the solution. The only problem is that the volume is given in ml instead of L. This problem can be solved using the following conversion factors::
1000 mL=1 L
Therefore, if we divide 200 mL by 1000 mL, we will obtain a value of 0.200 L.
The equation for molarity (concentration) is:
Concentration = Volume of solution (L)/Moles of solute (moles)
Thus, Concentration × Volume = Moles of solute
⇒0.450 M×0.200 L= Moles of solute
⇒ Moles of solute =0.09 moles
And thus, mass of NaOH = moles of NaOH× molar mass
⇒ Mass of NaOH=0.09 mol× 40.0 g /mol
⇒ Mass of NaOH=3.60 g
Therefore, 3.60 g of NaOH is required.
Molarity is the number of moles of solute per liter of solution. For example, when salt is dissolved in water, the salt becomes the solute and the water becomes the solution. 1 mole of sodium chloride weighs 58.44 grams. Dissolving 58.44 grams of NaCl in 1 liter of water results in a 1 molar solution, abbreviated as 1 M.
To find it, it is the number of moles of solute divided by the total volume of the solution in liters.
Molarity is also called molarity and is denoted by 'M'. For example, the molarity of a 1M sodium chloride solution in water is 1M. The number of moles of a solute can be calculated by dividing the mass by the molecular weight of the solute.
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Which of the five general types of reaction would most likely occur, given each set of reactants? What are the probable products?
a. A single compound is the reactant; two or more substances are the products.
...........................................................................................................................
b. Two Elements
...........................................................................................................................
c. Oxygen and a compound of carbon and hydrogen.
...........................................................................................................................
Answers
Answer:
a
Explanation:
Combination reaction.
Decomposition reaction.
Displacement reaction.
Double Displacement reaction.
Precipitation Reaction.
Which of the following elements has the same number of valence electrons as aluminum?
zinc
carbon
silicon
magnesium
or boron
Answers
Answer:
boron
Explanation:
Boron and aluminum lie in same group in modern periodic table and both have three valence electrons
Identifying map types
Answers
Answer:
Political Map. A political map shows the state and national boundaries of a place. ...
Explanation:
Rahul was given iron filings and sulphur powder. He prepared a compound of iron sulphide by heating the components in a china dish. What would be his observation if he adds a few drops of dilute sulphuric acid into the compound?
Answers
Answer:
A gas with a rotten egg smell is evolved
Explanation:
When iron fillings and sulphur were heated in the vessel, the following chemical reaction took place;
Fe(s) + S(s) -----> FeS(s)
This is a direct combination reaction.
Subsequently, when dilute H2SO4 is added, the following reaction takes place;
FeS(s) + H2SO4(aq) ------> FeSO4(aq) + H2S(g)
He immediately observes the evolution of a gas with a rotten egg smell.
Guys help me pls
Which of type of elements are mainly gases at room temperature, dull and
brittle with low melting points?
Answers
what makes sherbet fizzy
Answers
Answer:
The chemical reaction between the citric acid and sodium bicarbonate
Explanation:
Think about the different methods you used to travel from one place to another today. Describe two of these ways. For each, identify the energy source that caused the movement.
Answers
Answer:
An example could be using a car, bicycle, bus, etc.
Explanation:
From there you would identify the energy source as it says and describe them in a pargaraph.
For instance to describe a solar panels' energy. You would say the energy source is heated from the sun.
what type of data do you need to find the density of an object
Answers
Non-ferrous metal is NOT hardenable by heat treatment; it must
gain strength through a process such as tempering. Is this
statement TRUE or FALSE?
Group of answer choices
True
False
Answers
The statement is FALSE. Non-ferrous metals can be hardened by heat treatment, although the mechanisms and processes involved may differ from ferrous metals.
Heat treatment techniques such as precipitation hardening can be used to increase the strength of non-ferrous metals. Non-ferrous metals are metals or alloys that do not include iron (or iron allotropes, such as ferrite, etc.) in significant quantities. Non-ferrous metals are employed because they have desired qualities like reduced weight (for example, aluminium), greater conductivity (for example, copper), non-magnetic characteristics, or corrosion resistance (for example, zinc), even though they are often more expensive than ferrous metals. In the iron and steel sectors, several non-ferrous materials are also employed. Bauxite, for instance, is used as a flux in blast furnaces, whereas wolframite, pyrolusite, and chromite are utilised to create ferrous alloys.
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Sandra reacts 3.345 g of zinc with hydrochloric acid. She obtained 3.956 g of zinc chloride. Calculate the percent composition of chloride in zinc chloride.
Answers
Explanation:
One molecule of the antibiotic known as penicillin G has a mass of ... b) If you isolate 115 g of zinc chloride, what is the percent yield of the metal ... This drives off the volatile hydrochloric acid, but the.
As Sandra reacts to the 3.345 g of zinc with hydrochloride acid as HCL the obtained value is about 3.956 g of zinc and the chloride the calculated value is.
The composition of chloride and zinc chloride is formed when a halogen gains an electron and when the Hydrogen chloride is dissolved.one molecule of the antibiotics known the penicillin i.e G has a mass of 115 g of zinc chloride, what is the percent yield of the metal This drives the volatile HCL acid.Learn more about the Sandra.
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