Which of the following most likely indicates that a chemical change has
happened?
A. A plate breaks when it falls to the floor.
B. There's a loud sound when a jet airplane starts its engines.
C. An icicle melts in the sun.
D. A can is crushed when it is stepped on.
Answer:
Option B
Explanation:
A plate breaking when falling to the floor would be a physical change, not chemical, as what the plate is created from would not change.
An icicle melting in the sun would be a physical change, as an icicle is frozen water, and after melting it would be normal water.
A can being crushed is still just a physical change, as the material making the can(typically aluminum) has not changed.
When a jet airplane starts its engines, fuel is combusted, creating energy for the engines to start. This would create the loud noise. As fuel is combusted, it turns into different things, henceforth the sound would imply a chemical change has occurred.
is the moon considered a planet why or why not
Answer:
The moon is not officially considered a planet because it has many characteristics of a planet. The Earth-moon system is not double a planet. The only last possible selection for our moon is that it is a satellite of Earth.
Explanation:
"What would railroads do if every state had different requirements for smokestacks or track width?"
Answer:
The train will move on the roads.
Explanation:
If every state had different requirements for smokestacks or track width, the trains should be run on the roads because if there is different requirement for track width, it is impossible to run same type of train on these tracks. One another act will be done and that was to make different types of trains for each state so that they can move on the tracks. But it is impossible for having different track width, it must be of same width.
1.The open area of DNA where replication or transcription can take place is called A.replication Bubble B.replication form c.replication strand d.replication origin
2. Once the two strands of DNA are separated, what prevents them from assuming their double- helical shape? A.Other proteins hold the strands apart B.They are too far away from each other C.Each strand has opposing charges, which keep them repelled D. All of the above
3.How does DNA polymerase move along each strand of DNA? A.Both move towards the replication fork B.Both move away from the replication fork C.One moves towards from the replication fork and the other moves away from it D.There is only one DNA polymerase on the DNA at a time
4.How can each copy of DNA at the end of replication be compared? A.Each copy is identical to each other B.Each copy is different from each other C.They are 90% similar D.They are 50% similar
5.In the event of a mismatched nucleotide , which molecule is able to backtrack , "proofread ," and correct the nucleotide sequence? A.DNA Proofreadase B.DNA Polymerase C.DNA Helicase D.DNA Primase
Answer:
1) Transcription Bubble.
2) Replication Forks
3)
Explanation:
1) The region of opened- up DNA is called a Transcription Bubble. In transcription, a region of DNA opens up. One strand, the template strand, serves as a template for synthesis of a complentary RNA transcript.
2) The Replication Forks hold the 2 separated strands of DNA apart, preventing then from assuming their double helix shape... in order to replicate all your DNA its faster to replicate DNA if your doing it in many different areas at the same.
3)Since DNA polymerase requires a free 3` OH group for initiation of synthesis, it can synthesize in only one direction by extending the 3` end of the preexisting nucleotide chain. Hence, DNA polymerase moves along the template strand in a 3`-5` direction, and the daughter strand is formed in a 5`-3` direction.
I don't know 4 and 5
The answers to the following questions are:
Replication bubble.Replication fork One moves towards from the replication fork and the other moves away from it..Each copy is identical to each otherDNA PolymeraseWhat is DNA replication?A double-stranded DNA molecule is copied to create two identical DNA molecules through the process of DNA replication. Because every time a cell splits, the two new daughter cells must have the same genetic material, or DNA, as the parent cell, replication is a crucial process.
A particular kind of enzyme called DNA polymerase (DNAP) is in charge of creating fresh nucleic acid molecules that are copies of the original DNA. Polymers are huge compounds consisting of smaller, repeating units that are chemically linked to one another. Nucleic acids are polymers.
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Which is not true about mitosis A. The chromosomes in the daughter cells are half the number from the parent cell B. The chromosomes in the daughter cells are the same number as the parent cell C. Each nuclei is identical to the parent nucleus D. The four main stages of mitosis are prophase, metaphase, anaphase, and telophase
The chromosomes in the daughter cells are half the number from the parent cell. So, the correct option is (A).
What is Mitosis?Mitosis is defined as the part of the cell cycle in which the duplicated chromosomes are divided into two new nuclei. Cell division by mitosis gives rise to genetically identical cells in which the total number of chromosomes remains the same. Hence, it is also known as Equilateral Partition.
The phases involved in the mitosis are :-
ProphasePrometaphaseMetaphaseAnaphaseTelophase.Mitosis occurs in somatic cells which occurs in all types of cells that are not involved in the production of gametes. Each mitotic division contains one copy of each chromosome, thus a complete set of chromosomes is found in the nucleus of each new cell.
Thus, the chromosomes in the daughter cells are half the number from the parent cell. So, the correct option is (A).
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Which phase consistently has the least number of cell in that phase?
Answer:
Cytokinesis had the least number of cells in that phase.
How does the body use the glucose
molecules we get from our food?
how does changing the force affect the sound.
Answer:
A higher force will mostly sound brighter.
Explanation:
please what are the major branches of biology
Answer:
Botany, zoology, and microbiology.
Explanation:
The Tissues of vascular Plants are organized into more complex structures that carry out a Variety of functions in the plant what structure is formed by a Group of tissues that work together to carry out a Specific function
A) Cell
B) Organ system
C)Organism
D Organ
Due in 19 Minutes Best answer gets Brainliest
Index fossils are the remains of species that existed on earth for relatively short periods of time. True or False? Why
Answer:
Depends
Explanation:
Because some animals or things that left fossils behind might have been there since the beggining of time and some just so happened to develp over time -like dinos im guessing.
a substance witha PH of 6 is called A. suspension B. base C. acid D. Water. and why
Answer:
rom the oxygen atom being at one end of a water molecule and the ... b. The attraction between the hydrogen atom on one water molecule and the ... an example. c. A hydrogen bond is stronger than a covalent bond. d. They are the Water SUBSTANCES IN SOLUTIONS. Acids, Bases, and pH
Which organelle is present in the cells of a bean plant, but not in the cells of a human?
O Chloroplast
Nucleus
O cell membrane
O Mitochondria
Answer:
Chloroplast
Explanation:
Chloroplasts are present in a bean plants but not in the cells of a humans
Which two processes provide the glucose and nitrogen used to form amino acids in plants?
Answer:
C.
Photosynthesis and Nitrate absorption.
Explanation:
Just done it.
Which cellular waste product do the kidneys remove from the blood? oxygen carbon dioxide urea undigested food materials
Answer:
Urea.
Explanation:
Answer:
Urea, I studied
Explanation:
What provides the energy that is stored in ATP molecules?
A. Phospholipid
B. Food
C. Blood
D. Oxygen
Answer:
The correst answer is A.
Which layer of the Earth is responsible for making the magnetic field?
Answer:
THE OUTER CORE
Explanation:
The earth has a natural magnetic 1 page 2 field that is caused by the liquid iron in the earth's OUTER CORE.
1.) Give an example of a substance with a high concentration of H+ ions
2.) Give an example of a substance with a low concentration of H+ ions
pls help me:( i’ll love u forever i promise<3
Answer:
1. Battery acid or an acidic solution. 2. Apple juice, baking soda, bleach etc :)
Explanation:
More acidic the solution the higher H+ vice versa.
describe oviposition of frogs briefly.
Answer:
Oviposition and external embryonic developmental features are described in the Tobago glass frog, Hyalinobatrachium orientale.
Explanation:
Did your school decreased their Thanksgiving break from Wed. to Sun. because of the coronavirus?
Answer:
o m g YES THEY DID!!!!!!!!!
No they started the break on Friday and next Monday we have school I think not sure
Explanation:
one measure of weather includes the maximum distance at which large objects can be seen and identified with the unaided eye. what does this describe?
A. visibility
b. wind speed
c air pressure
d temperature
first answer gets brainiest
What's the difference between a planet’s rotation and a planet’s revolution as it moves in our solar system?
Answer:
"Rotation" refers to an object's spinning motion about its own axis. "Revolution" refers the object's orbital motion around another object.
Explanation:
For example, Earth rotates on its own axis, producing the 24-hour day. Earth revolves about the Sun, producing the 365-day year.
This picture shows a phospholipid bylayer. What crucial function do the nonpolar tails of the phospholipids have?
A) keep water-soluble substances from passing easily into the cell
B) help encode genetic material
C) allow water-soluble substances to pass easily into the cell
D) speed chemical reactions with enzymes
Answer:
It is B
Explanation:
I had this question on my test last week.
How Big Is DNA? PLEASE
Answer:
22 to 26 angstroms wide (2.2 to 2.6 nanometres), and one nucleotide unit measured 3.3 Å (0.33 nm) long.
Explanation:
Since photosynthesis primarily takes place in the leaves, it is essential that glucose can be transported out of the
cell to other parts of the plant. The selectively permeable plasma membrane only allows certain molecules to
cross freely through the phospholipid bilayer.
Is glucose a molecule that is allowed to cross the selectively permeable membrane freely?
Answer: A
No, glucose passes through a channel protein with the concentration gradient via facilitated diffusion.
Explanation:
Test on edge
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Plzzz helpp!!
What earthquake
feature lies directly
below the epicenter?
The top of the saturated zone is known as A. the aquifer B. the water table C. the unsaturated zone D. spring rock
Answer:
B. the water table
Explanation:
The question above is related to the topic on "Groundwater."
Groundwater is considered "fresh." It falls into the soil and gets soaked in it. It can stay stored for many years. It is very beneficial because it serves as a source of water for many residential places.
The storage of groundwater relies on two zones: unsaturated zone and saturated zone. The unsaturated zone is the first layer under the surface area of the land. It is followed by the "water table," which lies a little farther from the land surface. After which is the saturated zone where you can find particles of different rocks.
The top of the saturated zone is known as the water table. Therefore, option (B) is correct.
The water table divides the saturated zone, where water fills the crevices between soil or rock particles, from the unsaturated zone, which is air-filled. Precipitation, groundwater exploitation, and seasonality affect the water table. It controls groundwater supply and flow.
Spring or surface water bodies can form where the water table meets the land. Managing water supplies, analysing groundwater flow patterns, and assessing groundwater contamination require water table monitoring.
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Help! Need help on this due today!
Answer:
b
Explanation:
5. Why are microscopes useful tools in biology?
Answer:
cause to see the small organism that are only seen by microscope
Who proposed the primordial soup theory