Which happens during crossing over?
Two sex cells join together and combine DNA.
Genes are exchanged between two alleles.
Genes are exchanged between two egg cells.
Chromosomes line up randomly during metaphase I.
Answer:
Chromosones line up randomly during Metaphase |
Explanation:
Answer:
answer is d
Explanation:for all you edge 2020 people :)
Biodiversity/having lots of
different plants and animals in
a food web is important
because
Biodiversity is really important, because different species support each other in an ecosystem, and this maintains a healthy ecosystem.
Hope this helps! :)
and have a good day :)
This toy looks like a dog and can move, but it is a robot. What characteristics are missing to make it alive?
Answer: a beating heart,emotions,pain
Explanation:
please answer I will give brainiest to who helps. On the morning of a birthday party, a balloon is filled with 8.5 L of helium (He) when the temperature is 294 kelvin. The party starts at 4:00 p.m., at which time, the temperature has risen to 305 kelvin. What is the new volume of the balloon?
Answer:
V₂ = 8.8 L
Explanation:
Given data:
Initial volume = 8.5 L
Initial temperature = 294 K
Final temperature = 305 K
Final volume = ?
Solution:
The given problem will be solve through the Charles Law.
According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
Now we will put the values in formula.
V₁/T₁ = V₂/T₂
V₂ = V₁T₂/T₁
V₂ = 8.5 L × 305 K / 294 k
V₂ = 2592.5 L.K / 294 K
V₂ = 8.8 L
What is the formula for beryllium cyanide?
BeCN2
Be(CN)2
BeCN
Be2CN
Answer:
B
Explanation:
I think tha one is more used because it's more reasonable
The diagram shows JJ Thomson’s experiment with a cathode ray tube.
positively charged metal plate. negatively charge metal plate
Which of the following conclusions about the particles in the cathode ray is most consistent with JJ Thomson’s experiment and observations?
The particles are positively charged.
No assumptions can be made from the experiment.
The particles are negatively charged.
The particles are neutral.
Answer:
The particles are negatively charged.
Explanation:
Electron was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.
He constructed the glass tube and create vacuum in it. He applied electric current between electrodes. He noticed that a ray of particles coming from cathode to wards positively charged anode. This ray was cathode ray.
Properties of cathode ray:
The ray is travel in straight line.
The cathode ray is independent of composition of cathode.
When electric field is applied cathode ray is deflected towards the positively charged plate.
Hence it was consist of negatively charged particles.
Calculate the density of an object with a mass of 20 grams and a volume of
1000 cm3
Answer:
20/1000=0.02 denity+mass divided by volume
a wave has a frequency of 50Hz and a speed of 25m/s. What is the wavelength??
Answer:500m/s
Explanation:
True or false. The human ear drum transfers sound waves into vibrations and into the inner ear.
The human ear drum transfers sound waves into vibrations and into the inner ear. This statement is true.
What is sound wave ?A sound wave is the pattern of disturbance caused by the movement of energy as it propagates away from the source of the sound through a medium. Sound waves are produced by object vibrations and pressure waves, such as a ringing cellphone.
It gathers sound waves and directs them to the ear canal (external auditory meatus), where they are amplified. The sound waves then travel to the eardrum, also known as the tympanic membrane, which is a flexible, oval membrane at the end of the ear canal. The eardrum vibrates as a result of sound waves.
These vibrations are transmitted by the ear drum to the three tiny bones in the middle ear known as the malleus, incus, and stapes. The middle ear bones amplify, or increase, the sound.
Thus,The human ear drum transfers sound waves into vibrations and into the inner ear.
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Rocks found in streams can have rough edges and sharp grooves. What is the process that roughened the edges and caused the grooves
Answer:
Metamorphism
Explanation:
Rocks found in streams can have rough edges and sharp grooves. Metamorphism roughened the edges and caused the grooves.
What is rock?Rock is a naturally occurring mineral aggregate that is cohesive and composed of one or even more minerals. These aggregates often take the shape of recognisable and mappable volumes and are the fundamental building block of the solid Earth.
Igneous rocks are the ones that develop from magma, a liquid mixture of minerals that form rocks as well as frequently volatile substances like gases and steam. Igneous rocks are created at high temperatures because the minerals that make up its components are crystallized form molten material. Rocks found in streams can have rough edges and sharp grooves. Metamorphism roughened the edges and caused the grooves.
Therefore, metamorphism roughened the edges and caused the grooves.
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Four balls made of different materials are placed on a tabletop 2 meters from the floor.
Ball
Material
Mass
A
Styrofoam 5g
B
Rubber 18g
C
Plastic (hollow) 2g
D
Solid plastic 21g
Which ball has the GREATEST amount of potential energy?
Answer:
Styrofoam
Explanation:
A hot air balloon traveled 3.5 at 15 m/hr. What is its distance traveled
Answer:
52.2
Explanation:
The formula for distance is speed * time. Just multiply the time and speed together...
3.5 * 15 = 52.2
Therefore, went 52.2. I'm sorry but I don't know what the units will be (probably miles), I hope this helps, and I apologize if it's wrong.
Answer: 52.5
Explanation:
Areas of Earth that are covered with copious amounts of water are part of
this sphere?
Biosphere
Geosphere
Hydrosphere
Monosphere
Answer:
Hydrosphere
Explanation:
Hydro meaning water
Which condition must be met for conduction to occur?
particles must be large
particles must be small
particles must be in contact
particles must be spread apart
The condition that must be met for conduction to occur is particles must be in contact. Therefore, the correct option is option C.
What is conduction flow of heat?A pan heats up when you place it on the flame. It's because heat is transferred from the burner to the pan. Also, it allows any other utensil or pan to heat up. Yet after a while, the vessel cools down when you remove it from the heat. That happens because the vessel's heat is dissipated onto the surrounding area.
It enables the vessel to cool. Heat is passed from a warm object towards the cold object in both situations. Typically, it occurs in every situation. Conduction is the process through which heat is transported from one object's hot end to its cool end. The condition that must be met for conduction to occur is particles must be in contact.
Therefore, the correct option is option C.
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Which of these correctly describes a change in the state of water. a. Liquid water - melts - solid water b. Liquid water - boils - water vapor c. Solid water - condenses - liquid d. Water vapor - evaporates - liquid water
Answer:
b. Liquid water - boils - water vapor
Explanation:
a. Liquid water - melts - solid water
This is wrong; Water to Solid is freezing
b. Liquid water - boils - water vapor
This is the correct option!
c. Solid water - condenses - liquid
This is wrong; solid to liquid is melting
d. Water vapor - evaporates - liquid water
This is wrong; vapor to liquid is condensation
3. How is the transfer of energy different in electromagnetic waves
compared to mechanical waves?
Answer:
Electromagnetic waves are produced by the vibration of charged particles. ... A mechanical wave is a wave that is not capable of transmitting its energy through a vacuum. Mechanical waves require a medium in order to transport their energy from one location to another. A sound wave is an example of a mechanical wave.
Explanation:
what did the Copernican revolution demonstrate?
Answer:
The Copernican Revolution was the paradigm shift from the Ptolemaic model of the heavens, which described the cosmos as having Earth stationary at the center of the universe, to the heliocentric model with the Sun at the center of the Solar System.
Explanation:
From Google
Which of the following is an alkaline earth metal. Hh
Answer:
The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium, magnesium, calcium, strontium, barium, and radium.
Hope this helped!
If Chicago had experienced its average highest temperature
in August, which month would have had the longest day? Explain your
reasoning.
If Chicago had experienced its average highest temperature in August, the longest day remains the same and that is the 21st of June.
What is the effect of temperature on the length of the day?The effect of temperature induces the combination of more direct rays of the sunlight as the result of the tilting of the earth's hemisphere towards the sun to receive more solar energy and possess a warmer temperature.
But the temperature of a particular region also depends on the humidity and other abiotic parameters. So, if Chicago had experienced its average highest temperature in August, it does not mean that the longest day is in the month of August. It will remain, as usual, i.e 21 June.
Therefore, if Chicago experienced its average highest temperature in August, the longest day remains the same and that is the 21st of June.
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Which scientist had the first true atomic theory?
The measurement of an object's mass is a ____.
The density of aluminum is 2.7 g/ml. What is the volume of 8.1 g?
Answer:
volume= 3
Explanation:
D=m/v
2.7=8.1/v
2.7v=8.1
8.1/2.7= 3
8.1/3= 2.7 which is the density!
Answer:
3 mL
Explanation:
[tex]V = \frac{8.1 g}{3 mL} = 2.7 g/mL[/tex]
Can someone please help me!!??
Answer:
cyfctr rytfuhv
Explanation:
What is S for ClO3, the
chlorate ion?
Answer:
The chlorate anion has the formula ClO⁻ ₃. In this case, the chlorine atom is in the +5 oxidation state. "Chlorate" can also refer to chemical compounds containing this anion; chlorates are the salts of chloric acid.
"S" typically represents the oxidation state or oxidation number of an element in a chemical compound. For the chlorate ion (ClO₃⁻), the oxidation state of chlorine (Cl) is +5.
The oxidation number, also known as the oxidation state, of an element in a chemical compound is a numerical value that indicates the electron distribution and the degree of electron loss or gain by an atom in a chemical reaction. It helps to identify the type of chemical bonding and the role of each element in the compound.
The chlorate ion (ClO₃⁻) has a chemical formula of ClO₃⁻ where:
Cl: Chlorine has an oxidation state of +5 since oxygen (O) is known to have an oxidation state of -2 and the overall charge of the ion is -1.
O: Oxygen has an oxidation state of -2.
So, the oxidation state of chlorine in the chlorate ion is +5.
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Ava observes that a certain species of bird follows behind a herd of cattle. The bird species primarily eats insects. The birds stay with the herd of cattle as they graze. What is a scientific hypothesis that Ava could formulate based on her observations?
Answer:
There are insects associated with the cattle herd that serve as food for Ava.
Explanation:
The most logical hypothesis to deduce from the observation would be that the cattle herd has a kind of association with insects that happen to serve as food for the birds.
Usually, the body of cattle is plagued with different species of parasitic insects which obtain their foods and shelters from the animal. These parasitic insects will definitely be a food source for insect-predating birds. Hence, it follows logically that the Ava birds lurk behind the herd of cattle scouting for insects on the body of the cattle.
how many total electrons can the D orbitals hold
Answer:
10 electrons
Explanation:
The d sublevel has 5 orbitals, so can contain 10 electrons max. And the 4 sublevel has 7 orbitals, so can contain 14 electrons max. In the picture below, the orbitals are represented by the boxes. You can put two electrons in each box.
Hope it helps!
Answer:
10
Explanation:
Yes
Explain, in terms of electrons, energy, and energy levels, how the bright-line spectrum of an element is produced
helppp ASAP....The overall charge of a formula unit for an ionic compound ____.
Group of answer choices
A.is always zero (neutral)
B.it is always positive
C.is always negative
D. it may have any value
Answer:
onic compounds contain positively and negatively charged ions in a ratio that results in an overall charge of zero
Explanation:
Thats what I found when I looked it up but I didnt know what answer choice to pick out of that so Ill let you do it
Answer:
A. is always zero
Explanation:
In all cases the charge on the sum of the anions is equal to the charge on the sum of the cations, to give a neutral salt
How many molecules are in 25.08 grams of NH3?
In this reaction, how many moles of ethane (C2H6) would react with 35 moles of 02? 2C2H6 + 702 + 6H20 + 4CO2 O
A. 30 O
B.2 O
c. 10
D. 20
Answer:
C = 10
Explanation:
Given data:
Moles of O₂ = 35 mol
Moles of C₂H₆ react = ?
Solution:
Chemical equation:
2C₂H₆ + 7O₂ → 6H₂O + 4CO₂
Now we will compare the moles of O₂ with C₂H₆.
O₂ : C₂H₆
7 : 2
35 : 2/7×35 = 10 mol
Option C is correct.
Answer:
c. 10
Explanation:
a p e x , just took the quiz
