How does ultraviolet radiation harm living things?
Answer:
Ultraviolet (UV) photons harm the DNA molecules of living organisms in different ways. In one common damage event, adjacent bases bond with each other, instead of across the “ladder.” This makes a bulge, and the distorted DNA molecule does not function properly.
Explanation:
Which organism turns nitrogen back into nitrogen gas?
A. denitrifying bacteria
B. nitrogen fixing bacteria
C. decomposers
D. nitrifying bacteria
Answer:
b
Explanation:
part of the nitrogen cycle
Denitrifying bacteria turns nitrogen back into nitrogen gas. The correct option is A.
What is nitrogen fixation?Any natural or artificial process called nitrogen fixation causes free nitrogen, a relatively inert gas present in large quantities in the atmosphere, to chemically interact with other elements to generate more reactive nitrogen compounds like ammonia, nitrates, or nitrites.
Chemically, nitrogen fixation transforms atmospheric nitrogen into ammonia, which is ingested by living things.
In essence, nitrogen fixation transforms atmospheric nitrogen into a form that plants can use more easily.
Nitrate is transformed back into nitrogen gas by denitrifying bacteria, which then reenters the atmosphere. Runoff and fertilizer-related nitrogen enters the ocean, where it interacts with marine food webs.
Thus, the correct option is A.
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write the three principles of the cell theory. ASAP
Answer:
The three tenets to the cell theory are as described below: All living organisms are composed of one or more cells. The cell is the basic unit of structure and organization in organisms. Cells arise from pre-existing cells.
Leukemia is cancer of the body’s blood-forming tissues. A leukemia patient’s bone marrow produces abnormal white blood cells which do not function properly. A pharmacology company is trying to develop drugs to regulate the production of abnormal white blood cells. Which of the following processes is most likely affected by this new drug?
Cellular respiration
Transport of molecules
Cell differentiation
Cellular division
Answer:
Cellular division
Explanation:
it's because abnormal production (mutations) causes leukemia
cellular division is most likely affected by this new drug in case of leukemia. Thus option D is correct.
What is leukemia?Leukemia is a cancer related abnormal division in blood or blood-forming cells. It is other wise known as blood cancer.
The exact cause is not known, major risk factors are radiation exposure, chemotherapy for cancer, smoking, family history of leukemia, and exposure benzene.
Leukemia cells, do not clump to form tumor, due to this leukemia is not diagnosed through imaging tests.
Common symptoms include pain in the bones, swollen lymph,, bleeding and bruising nodes, feeling weak, fevers or night sweats etc.
Leukemias can be acute or chronic.
On the basis of cell type affected four types of leukemia observed such as acute lymphoblastic leukemia (ALL), chronic lymphocytic leukemia (CLL), acute myelocytic leukemia (AML), and chronic myelocytic leukemia (CML).
Thus option D is correct.
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1. Which of the following is not caused by deforestation?
A. Climate change
B. Desertification
C. Global warming
D. None of the
eukaryotic cells differ from prokaryotic cells in that eukaryotic cells
Answer:
Eukaryotes are organisms whose cells have a nucleus enclosed within a nuclear envelope. Eukaryotes belong to the domain Eukaryota or Eukarya; their name comes from the Greek εὖ and κάρυον. The domain Eukaryota makes up one of the domains of life in the three-domain system; the two other domains are Bacteria and Archaea. Eukaryotes represent a tiny minority of the number of living organisms; however, due to their generally much larger size, their collective worldwide biomass is estimated to be about equal to that of prokaryotes. Eukaryotes evolved approximately 1.6–2.1 billion years ago, during the Proterozoic eon.
Explanation:
Answer:
The primary distinction between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not. ... The nucleus is only one of many membrane-bound organelles in eukaryotes. Prokaryotes, on the other hand, have no membrane-bound organelles.
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2 points
C-C-C-H
TL 1
H H H
---
I-U-I
I
I-U-I
I-O-I
I-O-I
I-0-1
I
1
Name the following molecule*
I-O-I
1
O=0
I-O
Can I see the picture it might help
iodine oxide? there's a lot going on i can't really tell
As the solar system formed, it became flatter over time. What effect, if any, did this flattening likely have on the rate of rotation of the solar system?
Answer:
it likely had no effect
Explanation:
plato
6. Has a PH above 7 and is considered a base
A. acid rain
B. milk
C. household bleach
D. battery acid
All of the following are found in the DNA molecule excep
O Carbon dioxide
O deoxyribose
O phosphate
O nitrogen
Question 17 of 30 What is a disadvantage of using nuclear power? A. Nuclear power produces very little energy. B. Nuclear power is very expensive. C. Nuclear power produces greenhouse gases. D. Nuclear power produces radioactive waste. SU
A disadvantage of using nuclear power is D. Nuclear power produces radioactive waste.
What is nuclear power?Nuclear power is a controversial topic, with proponents arguing that it is a clean and efficient source of energy, while opponents point to the risks of accidents and the dangers of radioactive waste.
One of the main disadvantages of nuclear power is that it produces radioactive waste. Radioactive waste is a byproduct of the nuclear fission process, and it can remain radioactive for thousands of years. This makes it difficult to store and dispose of safely. Another disadvantage of nuclear power is that it is expensive to build and operate nuclear power plants.
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10 points
The diffusion of water molecules in and out of cells is very common.
Which of the following is the process by which water moves across a
membrane, from an area of high concentration to low concentration,
without the use of energy? *
osmosis
hydrolysis
photosynthesis
cyclosis
Osmosis is the process; it is essentially diffusion, which is a spontaneous (no energy input required) process as applied to water.
----------------------------
Hydrolysis is incorrect; that describes a type of chemical reaction in which water breaks a chemical bond.
Photosynthesis is incorrect; that describes the complex process in which energy in light is converted into chemical energy.
Cyclosis is incorrect; that describes the movement of cytoplasm within a cell. There is no spontaneous, net movement of water across a concentration gradient.
What is the molecule that is formed as a result of the acceptance of hydrogen ion and the final acceptor molecule.
Answer:
Water (H2O)
Explanation:
The final acceptor molecule in the electron transport chain is oxygen. When oxygen accepts hydrogen ions, it forms water. This is why water is released as a byproduct of cellular (aerobic) respiration
what is the relation between weight of the body and weight of the heart
Describe an example of acceleration and explain how velocity is changing
The velocity is changing because the acceleration is present which is non-zero.
What is acceleration?The rate of change of velocity of an object in a particular direction is known as acceleration. The acceleration is a vector quantity and its SI unit is a meter per second square. The acceleration is given as,
a = dv / dt
Where dv / dt is known as change.
According to Newton's Second Law, the amount of an element's acceleration is the joint result of two reasons:
The strength of the net resultant force, which is directly proportional to the sum of all external forces exerted on that item;Depending on the components used to create it, an object's mass is inversely related to its magnitude.The velocity is changing because the acceleration is present which is non-zero.
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A force of 240 N causes an object to accelerate at 3.2 m/s2. What is the mass of the object?
A.75N
B.75 kg
C.0.013 kg
D.768 kg
Which is the answer?
Answer:
B.75 kg
Explanation:
Given parameters:
Force on the object = 240N
Acceleration of the object = 3.2m/s²
Unknown:
Mass of the object = ?
Solution:
Force is the pull or push on an object. According to Newton's first law; it is mathematically expressed as;
Force = mass x acceleration
The unknown here is the mass, simply input the parameters and solve for it;
240 = mass x 3.2
mass = [tex]\frac{240}{3.2}[/tex] = 75kg
The mass of the object is 75kg
HELP I NEED URGENT HELP! THIS IS DUE IN 5 MINUTES
Anyone know what this is?!?! It’s not a coral, it’s not a plant and it has no brain nor central nervous system.
Please help!!!
A__ is a prediction of an outcome and the basis for experimentation
Select one
a conclusion
b. constant
O c hypothesis
INTL
SOS
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what type of root a plant of wheat has? draw a diagram of such
PLEASE HELP
What is one explanation for ocean water’s have more salinity near the latitude?
A. Warmer temperatures cause more evaporation, leaving more salt behind
B.) Ocean animals near the latitudes produce extra salts
C.) Cooler temperatures cause more salts to be created.
D/) Warmer temperatures cause more salts to be created.
Answer:
A
Explanation:The more surface evaporation, the higher the salinity.
But more precipitation can reduce salinity.
5.the largest classification which all organisms have in common is......
6.what is the name of that group?
Most nerve senses are routed through the
In what stage of meiosis is crossing over most likely to occur?
What is the function of the nucleus of a cell.
Answer:it coordinates cell activities like protein synthesis and cell division. Anatomically the nucleus is made up of several components: nuclear envelope, nuclear lamina, nucleolus, chromosomes, nucleoplasm are some of these components.
Explanation:
Answer:
The nucleus controls and regulates the activities of the cell and carries the genes, structures that contain the hereditary information. Nucleoli are small bodies often seen within the nucleus. The gel-like matrix in which the nuclear components are suspended is the nucleoplasm.
Explanation:
HELP PLZ!!!
15. (01.04 LC) Which of the following best defines average speed? (3 points)
1: It is the speed of an object in a specific direction.
2: It is an object's speed at a specific point in time.
3:It is the total distance traveled over the total time.
4: It is a measure of how far an object moves in a certain time.
Answer:
4: It is a measure of how far an object moves in a certain time.
Explanation:
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If anyone is good at environmental science? can you give me your snap if you are good at it, cause I have a lot of work for that class to finish :(
HURRRY PLEASE!!!!
If oxygen is present after glycolysis, the citric acid cycle begins, which is indicated by letter __.
A) Location A
B) Location C
C) Location E
D) NONE OF THESE
Answer:A
Explanation:
Why is the relationship between surface area and volume central to many cellular processes?
Answer:
The greater the surface-area to volume ratio of a cell, the easier it is for the cell to get rid of wastes and take in essential materials such as oxygen and nutrients.
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HELP ASAP
No animal is as creative as people.
True
False
Answer:
I believe it is false.
Explanation:
Other apes are creative too.
based on the information in the table, which type of oil is the worst for a healthy lifestyle
Answer:
coconut oil
Explanation: