Answer: A
Explanation: most of the mass contained in the nucleus.
Most of the mass of an atom is contained in the nucleus. So the correct option is A.
What is atomic mass?The amount of matter that is contained in an atom is defined as the atomic mass of an atom. In mathematical terms, atomic mass is 1/12th of the mass of a carbon-12 atom. This is assigned an atomic mass of 12 units.
The unit for measuring atomic mass is called Dalton after the English scientist John Dalton.
Atomic mass is expressed as the sum of the mass of protons and neutrons. Protons are positively charged particles and neutrons are particles with no charge.
Atomic mass is expressed as the mass of protons and neutrons because protons and neutrons are present in the nucleus. Thus, it is said that most of the mass of the atom is concentrated in the nucleus.
The mass of electrons is comparatively less than the mass of protons and neutrons combined. Also, electrons are present in the atomic shells of the atom.
Therefore the correct option is A.
Read more about atomic mass, here
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Some grass species need fire in order for their seeds to germinate. Why might this adaptation be useful for grasses? A. Fire allows trees to grow and to provide shade for the grasses.B. The hot temperature of the fire helps the grasses grow faster. C. Seeds can germinate in an area that has been cleared by a fire. D. Fire discourages grazing by large animal so the grasses can grow higher.
Answer:
D. Fire discourages grazing by large animals so grass can grow higher.
Explanation:
Fire allows trees to grow and provide shade for the grasses. ... Seeds can germinate in an area that has been cleared by a fire.
The number of protons determines the _____.
atomic mass
atomic number
atomic structure
atomic charge
Answer:
atomic number
Explanation:
the number of protons tell us the atomic number
what type of molecular movement requires energy
Answer:
When a molecule moves down its concentration gradient is it participating in passive transport; moving up the concentration gradient requires energy making it Answer:active transport
Trisodium phosphate The prefix Tri means what? *
Answer:
the prefix tri means three
Answer:
tri means "three"
Explanation:
common english vocabulary words that contain this prefix include trio and triangle.
Which of the following statements about plankton or nekton is NOT correct?
a. Nekton are active swimmers.
b. Phytoplankton are important primary producers.
c. All plankton are closely related to plants.
d. Plankton drift or swim weakly.
e. Zooplankton are heterotrophic plankton.
Answer:
C. All plankton are closely related to plants.
Explanation:
Plankton are organisms found in water that exist in a drifting state. They are too small or weak to swim on their own, so they let the current or tide carry them. They are usually microscopic but include larger species as well, such as some crustaceans and jellyfish.
Phytoplankton are autothrophic plankton. This means that they produce their own food. They are primary producers and closely related to plants.
Zooplankton are heterotrophic plankton, which means that they feed on other organisms. They are animals and aren't closely related to plants.
Nekton are organisms found in water that swim actively.
Based on this information, we can conclude that statement C is the only incorrect statement.
What similarities do the three revolutions share?
Answer:
Revolutions do share common features, however. One is that they are fast-moving. In a short time, often just a few years, a revolution can bring about significant change and upheaval. Most revolutions are driven by people and groups inspired by hope, idealism and dreams of a better society.
Chikungunya is caused by ____________.
Answer:
Mosquitoes
Explanation:
Chikungunya is a viral disease transmitted to humans by infected mosquitoes. It is caused by the chikungunya virus (CHIKV). A CHIKV infection causes fever and severe joint pain. Other symptoms include muscle pain, joint swelling, headache, nausea, fatigue and rash.
he human stomach helps break down food for digestion. Which statement BEST describes the stomach?
A.
It is part of a cell with a specific function.
B.
It is a single cell that performs a life function.
C.
It is made up of a small number of cells that perform a single function.
D.
It is composed of millions of cells of several types working together to perform a function.
Windy and rainy days are cold why
1. Classify each of the following substance as organic or inorganic. Explain your
choice.
a) honey
d) CO
b) saran (plastic) wrap
e) orange juice
c) obsidian (volcanic rock)
1) water
During the process of photosynthesis, which of the following is being created by producers
The Last Supper, also called the Lord's Supper, was originally the Passover.
A).True
B).False
Answer:
f
Explanation:
Answer:
(A) True
Explanation:
Given sin 0 = 4/5
use the Pythagorean Theorem to find the value of cos 0.
A) cos 0 = 3/4
B) cos 0 = 3/5
C) cos 0 = 4/3
D) cos 0 = 4/5
Answer:
cosθ = 3/5
Explanation:
Given that,
sinθ = 4/5
We need to find the value of cosθ.
We know that,
sinθ = P/H
Where
P is perpendicular and H is Hypotenuse
Using Pythagoras theorem to find base (b).
H²=P²+B², b is base
We have, H = 5, P = 4, B=?
b²=5²-4²
b=3
We know that, cosθ = B/H
Putting all the values,
cosθ = 3/5
Hence, the correct option is (b) "cosθ = 3/5".
IT'S AN EMERGENCY PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!!!!! PLEASE I NEED HELP ASAP PLEASE HELP!!!
This is the question
How do animal cells survive without chloroplasts? Explain
(This is 7th grade science)
What are the 4 principles of natural selection?
First part science pls help
Answer:
I am pretty sure its ribosome
Explanation:
if it's right please give me a heart hope it helps
Answer:
lysome
Explanation:
I am sure of that answer
Which of the following features did whales possibly inherit from a four-legged ancestor?
1. gills
2. hip bones
3. blow hole
4. dorsal fin
Answer:
2. Hip bones
Explanation:
More than 40 million years ago, whales had ancestors who walked on land. Even now, they have a feature they inherited from them - hip bones. Scientists used to think that they are vestigial, i.e. that they lost their function. However, recently they discovered that these bones help whales (and other marine mammals who have them, such as dolphins) maneuver better mating.
Whales developed the rest of the listed features later, when they became marine animals. This is why they are incorrect.
Which statement correctly describes the bonding between water molecules? A. The hydrogen atoms have a partial positive charge and are attracted to the oxygen atom in another molecule, which has a partial negative charge. B. The hydrogen atoms have a partial negative charge and are covalently bonded to the oxygen atom in another molecule, which has a partial negative charge. C. The hydrogen atoms have a partial positive charge and are covalently bonded to the oxygen atoms in another molecule, which have a partial negative charge. D. The hydrogen atoms have a partial negative charge and are attracted to the oxygen atom in another molecule, which has a partial negative charge.
Answer:
A. The hydrogen atoms have a partial positive charge and are attracted to the oxygen atom in another molecule, which has a partial negative charge.
Explanation:
I just took the quiz. That was the correct answer.
The hydrogen atoms have a partial positive charge and are attracted to the oxygen atom in another molecule, which has a partial negative charge. The correct option is A.
What is a hydrogen bond?A hydrogen bond or H-bond is an electrostatic attraction between a hydrogen atom covalently bound to a more electronegative "donor" atom or group.
Another electronegative atom weighing down a lone pair of electrons the hydrogen bond acceptor.
Since the electron is not shared evenly between a hydrogen atom and a negatively charged atom, hydrogen bonding occurs.
Hydrogen in a bond still has one electron, whereas a stable electron pair requires two electrons.
Hydrogen bonds form between adjoining hydrogen and oxygen atoms of adjacent water molecules in the case of water. A hydrogen bond is formed by the attraction of individual water molecules.
Thus, the correct option is A.
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What do chloroplasts and mitochondria have in common?
absorption of light energy
production of ATP
digestion of cell wastes
presence in all cells
Cell division is necessary for an organism to a. obtain nutrients b. grow and reproduce c. make proteins d. conserve matter and energy
Answer:
c. make proteins
Explanation:
.
9. Why is the law of conservation of mass true?
a. All atoms at the start of a chemical reaction are present at the end of the reaction.
b. All the molecules in a substance remain intact during a chemical reaction.
c. The substances at the start of a chemical reaction gather more atoms to make up
for those lost in the reaction.
d. All molecules at the start of a chemical reaction are present at the end of the
reaction
Answer:
I think it's D but I'm not too sure. Let me know if it's correct !
THIS QUESTION IS DUE IN 10 MINUTES I NEED HELP PLEASE ASAP
Define the term enzyme. Describe how enzymes influence metabolic reactions in the cell.
Answer:
Some enzymes help to break down large nutrient molecules, such as proteins, fats, and carbohydrates, into smaller molecules. Each enzyme is able to promote only one type of chemical reaction
Explanation:
The compounds on which the enzyme acts are called substrates
I try my best
What determines if a particle can cross a cell membrane? *
Answer:
Lipophilic (non-polar molecules), such as steroid hormones or O2 gas can pass... very small uncharged polar molecules (such as H2O, ethanol and urea) can also get through... otherwise you need a membrane protein to "facilitate" the transport of the molecule across the membrane, ion channels are used for water, or charged molecules; carriers/transporters are used for other molecules.
Identify the organelle *
1 point
Outer membrane
Inner membrane
Crista
Matrix
DNA
ma
O Ribosome
O Mitochondria
Ο Ο Ο Ο
Nucleus
O Chloroplast
Explanation:
Mitochondria
hope it helps u
why would breeding year round favor natural selection?
Answer:
Only the strongest would survive each year and be able to breed
Explanation:
According to Darwin's theory of evolution if an animal were to be put into terrain whether local or new, the animal would need to adapt as its surrounding slowly change. If said animal is unable to adapt in time it will perish or be unable to produce strong offspring that will survive.
A rainbow after a rainstorm is an example of what? What is the point of confusion?
Answer:
C
Explanation:
Answer:
This scrambling is what we call refraction. After scrambling interior the rain bead, the light bounces once until it at long last exits the bead and a rainbow is made.
_____ is caused by stress and is the bending, tilting and breaking of rock.
How does using microbes and other bio-life forms help to remove contaminants from soil and groundwater?
A) It changes the chemical structure in reused contaminants.
B) It offers considerable promise for cleaning up contamination.
C) So far, it is the only risk-free method of removing contaminants.
D) It doesn't work at all.
Answer:
B.) It offers considerable promise for cleaning up contamination.
Explanation:
got it right on edge 2021 :)
Answer:
B) It offers considerable promise for cleaning up contamination.
Explanation:
edge :D
A person invested \$6,000$6,000 in an account growing at a rate allowing the money to double every 11 years. How much money would be in the account after 19 years, to the nearest dollar?
Answer: $19,866
Explanation:
We know that the initial investment is $6,000. And it doubles every 11 years.
Then after 11 years, the amount of money will be 2*$6,000
After another 11 years (a total of 22) the amount of money will be 2*(2*$6,000)
or $6,000*(2)^2
We already can see that this is an exponential growth equation.
After n times 11 years, the amount of money will be;
M = $6,000*(2)^n
But n represents groups of 11 years, then if y represents the number of single years, we can write the equation as:
M = $6,000*(2)^(y/11)
You can see that y = 11 is equivalent to n = 1
y = 22 is equivalent to n = 2
and so on.
Then the equation:
M = $6,000*(2)^(y/11)
Tell us how much money will be in the account after y years.
Now we only need to replace y by 19, to get:
M = $6,000*(2)^(19/11) = $19,866
Where i rounded the amount of money to the nearest dollar.
What is the probability that individual C-1 is Ww?
Answer:
100% or 1/1 or 1
Explanation:
all the same thing, i just took the AP bio chapter 14 test lol :)
