Answer:
The cell membrane controls the substances that enter and exit the cell
Explanation:
The cell membrane defines the boundaries of the cell, separating the internal components from the external environment.
The membrane is a semi-permeable barrier that lets some substances in and out, but not others.
Therefore, the cell membrane controls many of the activities of the cell. As a result, it is crucial to maintain the normal functioning of the organism
a genetic mutation caused a newt to have faster reflexes. after generations, most of the newt population has the reflex mutation. what most likely caused this change
Answer:
Newts with the mutation are better able to survive and reproduce than newts without the mutation.
Explanation:
HELPPPP PLEASEE
Most S-waves from an earthquake disappear at a distance of about 11,500 kilometers from the epicenter of the earthquake. Explain why this occurs in terms of structure of Earth's interion.
Answer:
When an earthquake occurs the seismic waves (P and S waves) spread out in all directions through the Earth's interior. Seismic stations located at increasing distances from the earthquake epicenter will record seismic waves that have traveled through increasing depths in the Earth.
Seismic velocities depend on the material properties such as composition, mineral phase and packing structure, temperature, and pressure of the media through which seismic waves pass. Seismic waves travel more quickly through denser materials and therefore generally travel more quickly with depth. Anomalously hot areas slow down seismic waves. Seismic waves move more slowly through a liquid than a solid. Molten areas within the Earth slow down P waves and stop S waves because their shearing motion cannot be transmitted through a liquid. Partially molten areas may slow down the P waves and attenuate or weaken S waves.
When seismic waves pass between geologic layers with contrasting seismic velocities (when any wave passes through media with distinctly differing velocities) reflections, refraction (bending), and the production of new wave phases (e.g., an S wave produced from a P wave) often result. Sudden jumps in seismic velocities across a boundary are known as seismic discontinuities.
Within the Earth, molten areas slow down P-waves and stop S-waves because shearing motion of the waves cannot be transmitted through a liquid.
Earthquake cause the seismic waves (P and S waves) that spread out in all directions even in the Earth's interior. Seismic waves move more slowly through a liquid than a solid.
Within the Earth, molten areas slow down P-waves and stop S-waves because shearing motion of the waves cannot be transmitted through a liquid.
Therefore, most of the S-waves of an earthquake disappear about a distance of 11,500 km from the epicenter.
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1 point
3. When gametes (sex cells) are produced from a body cell during normal
meiosis, which of the following describes the number of chromosomes in
each new sex cell? *
A. Each resulting cell has the same number of chromosomes as the original body cell.
B. Each resulting cell has twice the number of chromosomes as the original body cell.
C. Each resulting cell has one-half the number of chromosomes as the original body
cell
D. Each resulting cell has one-fourth the number of chromosomes as the original body
cell.
Answer:
B
Explanation:
Explain how the double helix structure of DNA aids in the function of replication.
Answer:
DNA is made up of a sugar phosphate backbone .
it has4 bases namely adenine ,thymine ,guanine and cytosine shortened to A T G C
adenine and thymine are connected by 2 hydrogen bonds and guanine and cytosine are connected by 3 hydrogen bonds
the two strands are anti parallel in nature ie, if one strand is from 3 to 5 the strand is from 5 to 3.. there are three types of DNA depending on the environment... they are adna bdna and zdna
Explanation:
hope it helps....
good luck
6Both plant and animal cells have a cell wall.
A.
True
B.
False
Help please thank you
Answer:
False the answer is actually false
how can you use the electron configuration to determine the number of valence electrons
Here, we are required to explain how the electronic configuration can be used to determine the number of Valence electrons.
The algebraic sum of electrons in the highest energy level in an electron configuration is the number of Valence electrons of the element.Valence electrons simply refers to electrons present in the outermost shell of an element.
Valence electrons simply refers to electrons present in the outermost shell of an element.The electron configuration is a representation of the arrangement of electrons in the atomic orbitals of an element.
The number of electrons present in the outermost shell as evident from the electron configuration can be used to determine the Valence electron in the elements.Fir instance: the electron configuration of potassium; 1s² 2s² 2p⁶ 3s² 3p⁵
The algebraic sum of electrons in the energy level 3 therefore is the number of Valence electrons.
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Please Help Me!!!
Which of the following is TRUE about the flagellum?
The flagellum is a hair-like structure present within the bacterial cell wall.
The flagellum is made up of flagellin proteins.
The flagellum is made up of carbohydrates.
The flagellum is not a mode of locomotion.
Answer:
So with the explanation the first or second statement might be true.
EXPLANATION:
a slender threadlike structure, especially a microscopic appendage that enables many protozoa, bacteria, spermatozoa, etc.
HOPE THIS HELPS SORRY I COULDNT GIVE YOU MORE INFO!
Answer:
A
Explanation:
i took the test
What happens to macromoleclues from food during digestion
Food labels provide which of the following information
A. Number of servings
B. Calories per serving
C. Vitamin and mineral content
D.All of the above
Elderly people fear dependency because
they lose their independence,
b. their status in society changes.
it necessitates new role behaviors.
all of the above
d.
I would say the answer is D
I hope this helps :)
According to the question, Elderly people fear dependency because all of the above.
What are old people worried about?Fear of losing independence as they grow older is a key concern across the ages. whether that could mean losing memory, being in poor health or not having financial security.
Thus, option "D" is correct.
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A shadow is caused when an object blocks sunlight. For example, when your body blocks sunlight, you may see a shadow of yourself on the ground. How do you think the shadow of an object, such as a flagpole, would change over the course of the day as the Sun appears to move across the sky?
Answer:
The position of the sun affects the change in the direction and size of the shadow of the object. When sunlight is blocked by and object a shadow forms, as the earth moves on its axis daily it looks like the sun rises in the east and sets on the west.
When the sun is low in the sky the more light is blocked by an object which means the shadow will be longer and shadow will always point far from the direction of the sun.
In the morning sun is in the east so the shadow will be towards the west in the morning, shadows are long and point northwest and at noon, shadows are short and point north late afternoon shadows are long and towards the northeast.
Answer:
M
Explanation:
match the type of river to to its best description.
Answer:
Old rivers-Have many meanders
Young rivers-Carry large objects
Mature rivers-Carry medium-sized objects
The following are the correct matches:
Old rivers-Have many meandersYoung rivers-Carry large objectsMature rivers-Carry medium-sized objectsWhat are rivers?Rivers are bodies of flowing water that are typically found on the surface of the Earth. They are formed by the accumulation of precipitation, such as rain or snow, in a specific area and flow in a defined channel towards an ocean, a lake, or another river. Rivers can vary greatly in size and length, with some being just a few meters wide and a few kilometers long, while others can be several kilometers wide and thousands of kilometers long.
They are an important resource for humans and other living organisms, providing water for irrigation, drinking, and industrial uses, as well as serving as habitats for a wide variety of plant and animal life. Rivers also shape the land they flow through, eroding and depositing sediment, and creating features such as valleys, deltas and canyons.
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Which organelle lines up and guides the chromosomes inside the cell during cell division in an animal cell? A. Cytoskeleton B. Ribosomes C. Centrioles D. Vacuole
Answer:
It would be C!
Explanation:
The function of Centrioles is to help organize the chromosomes before cell division occurs so that each daughter cell has the correct number of chromosomes after the cell divides! hope this helps!
Why do scientist study ice cores
Select all that apply
To study Earth's past climates
To study how Earth's climate is changing now
To study how climate typically stays the same
To study how it might change in the future
Answer:
to study earth's past climate
Answer:
Explanation:
Air bubbles and dust get trapped in ice as it forms. And the ice in some places, like Antarctica, has stayed frozen for over a million years. Scientists drill holes in the ice and remove ice cores. Each year's worth of ice forms a layer within the core.
The material trapped in ice layers gives information about the climate at that time. Scientists study the layers to learn about past temperatures and precipitation. They can learn how the amount of carbon dioxide in the atmosphere has changed over time. The layers also reveal when events such as volcanic eruptions have taken place.
Tonya is modeling the discovery of electromagnetic induction. Which procedure should she use?
O moving a magnet into a coil of wire in a closed circuit
O moving a magnet into a coil of wire in an open circuit
O bringing a compass near a wire that has no electric current
O bringing a compass near a wire that has an electric current
Answer:
Moving the MAGNET to a CLOSED circuit
Explanation:
Answer:
A
Explanation:
Are state changes chemical or physical changes? Provide an example of a state change and explain why it is a chemical or physical change.
Answer:
physical
Explanation:
example: water freezing into ice
there is no change in the chemical properties, frozen water is still water
Monomers are the building blocks of larger molecules called polymers. A polymer consists of repeating monomers bonded to each other with covalent bonds.
Use the draw pad to connect each monomer to its polymer.
Answer:
Explanation: It connects to each one shown below. All correct.
The monomer of DNA is a nucleotide. The monomer of glucose is carbon, hydrogen, and oxygen.
What are monomers and polymers?The simplest form of polymers is monomers. To create polymers, each monomer is combined. Usually, a double bond or triple bond holds the monomer together.
Typically, monomers contain two free electrons that pair together and create a double bond among themselves. The monomers of cellulose are an example of a monomer and contain glucose.
A monomer is a molecule that, when combined with additional monomers of the same kind, can create a polymer, such as glucose (C6H12O6). A biological polymer made of several -glucose units is cellulose, which serves as an illustration of this.
Therefore, the monomer of DNA is a nucleotide. The monomer of glucose is carbon, hydrogen, and oxygen. The monomer of their polymers is matched in the added picture.
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Can you please answer this NEEDS answers and work
Answer:
1. (a) protons (b) neutrons (c) electrons
2. positive +, protons. negative -, electrons. no charge 0, neutrons.
3. periodic table
4. 2 atoms
5. chemistry
6. 6 atoms, 4 hydrogen and 2 oxygen
7. oxygen
8. H2O
i dunno the answers for the rest but i hope this helped :)
In which of the following cell structures are the Drosophila chromosomes
(DNA) located?
A. Lysosomes
B. Nucleus
C. Ribosomes
D. Vacuole
Answer:
DNA is found in the nucleus. So B.
Explanation:
DNA is found in chromosomes and chromosomes are found in the nucleus because the nucleus is basically the DNA of a cell.
In the nucleus, cell structures are the Drosophila chromosomes (DNA) located. The correct option is B.
What is chromosomes?The thread-like components known as chromosomes are found in the nucleus of both animal and plant cells. Protein and a single molecule of deoxyribonucleic acid make up each chromosome (DNA).
DNA is passed down from parents to children and contains the precise instructions that give each kind of living thing its individuality.
a component that can be found in a cell's nucleus. Proteins and DNA are arranged into genes on a chromosome. There are typically 23 pairs of chromosomes in each cell.
One chromosome is made up of one protein and one DNA molecule. Different chromosome sizes can be packed together into a nucleus thanks to proteins called histones.
The DNA for the Drosophila chromosomes is found in the cell's nucleus.
Thus, the correct option is B.
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Which type of cell is pictured on the right?
eukaryotic
prokaryotic
eukaryotic because it is nuclear
13. The geological theory that states that pieces of Earth's outer layer are in
constant, slow motion is the theoryof *
subduction.
plate tectonics.
sea-floor spreading
deep-ocean trenches.
Answer
sadc
Explanation:
sdsdsdd
what is transport system?short answer in plants
What is meant by "true nucleus".
it simply means the cell's DNA is surrounded by a membrane. therefore the nucleus houses the cell's DNA and directs the synthesis of the proteins and ribosomes the cellular responsible for protein synthesis.
Which of the following is the best evidence that Earth’s continents were once in vastly different positions than they are today? a. Penguins are found only in the Southern Hemisphere. b. Fossils of tropical plants are found in c. Volcanoes encircle the Pacific Ocean. d. Major rivers form deltas from continental erosion. explain for every answer PLEASE I NEED IT IS DUE TODAY!!!!!!!!!!!!!!!!
Answer:
whats the full answer for b I think its your best bet
Tyrone slipped and fell on his gluteal region. Which area of his body did he injure?
1. the shoulder blade
2. the lower back
3. the buttocks
4. the groin
Answer:
the buttocks
Explanation:
the glutes are your behind.
C. The Buttocks
Gluteal=Buttocks
An atom's nucleus contains three protons and three neutrons. What is the
overall charge of the nucleus?
A. +3
B. +6
C. -3
D. 0
Answer:
+3
Explanation:
protons are positive and neutrons are neutral, so, thinking if it in mathematical terms, three positive 1's + three 0's = 3
What would be the main problem with reproduction if meiosis did not take place to form sex cells?
A. The zygote would have two nuclei.
B. Fertilization would result in a zygote with half as many chromosomes as the parents.
C. Fertilization would result in a zygote with twice as many chromosomes as the parents.
D. The zygote would have no nucleus.
Answer: C. Fertilization would result in a zygote with twice as many chromosomes as the parents.
Explanation: Hope this helps
Answer:
The zygote would have two nuclie
Explanation:
Which of the following procedures demonstrates repetition?
Marco places a toy car at the top of a ramp. He releases the car and measures how long it takes for the car to reach the bottom of the ramp. Then, he returns the car to the top of the ramp, releases the car again, and makes an additional measurement.
HELP PLEASE! WILL GIVE BRAINLY! Describe a strong, bond in which electrons are unevenly shared between two atoms due to a different in electronegativity. A. Adhesion b. Hydrogen bond c. Polar covalent bond. Ionic bond
Answer: Polar covalent bond
Explanation:
In ionic compounds, electrons are transferred between atoms of different elements to form ions. But this is not the only way that compounds can be formed. Atoms can also make chemical bonds by sharing electrons equally between each other. Such bonds are called covalent bonds
Which statement describes the effect that a DNA mutation most likely has on an organism?
Answer:
is it multiple choice?
