Answer:
D. Toy pulls on the child in the opposite direction
Explanation:
Newton third law of motion states that for every action, there is an equal and opposite reaction. This means that whenever an object 1 exerts a force (action force) on another object 2, object 2 exerts a force (reaction force) of equal magnitude but opposite direction on object 1.
According to this question, a child pulls a toy across the floor. Based on Newton third law described above, the toy will pull the child with an opposite force that is equal in magnitude. Hence, the equal and opposite force is: Toy pulls on the child in the opposite direction.
Which of the following statements is true?
Opportunistic bacteria only cause infection under certain conditions.
Most bacterial infections are caused by bacteria already in the body.
Leukocytes are the first line of defense against pathogenic microorganisms.
The flu and the common cold are treated with rest, fluids, and antibiotics.
Answer:
1 one is true
2 is true
3 is falase
Answer:
a
Explanation:
Helppp please
Which federal agency, formed in 1977, now combines regulation and other aspects of the energy industry that were
previously scattered under several other agencies?
O Occupational Safety and Health Administration
O Mine Safety and Health Administration
OU.S. Energy Information Office
o Department of Energy
D. Department of Energy (DOE)
Explanation: The DOE has been officially in charge of all aspects of energy since 1977; their activities prior to this were assigned to various different government agencies.
Answer: The correct answer is Department of Energy (DOE)
Explanation: This answer has been confirmed correct.
17. Match the major types of cancer with the types of cells they occur in
Adenocarcinomas
a. The lowest layer of the epidermis (skin)
Basal cell carcinoma
b. upper layers of skin, the lining of stomach, lungs,
kidneys
Squamous cell carcinoma
c. melanin-producing cells of the skin
Sarcoma
d. immune cells in the blood (T cells, B cells, and
bone marrow)
Leukemia and lymphoma
e. bones, fat, blood vessels, tendons, ligaments
Multiple myeloma
1. cells that produce fluids (breast, colon)
Melanoma
g. plasma cells (a type of immune cells)
In which cellular organelle is genetic information (DNA) held?
A. Mitochondria
B. Ribosomes
C. Cell membrane
D. Nucleus
Answer: d. nucleus
Explanation:
Which refers to the sum of all the forces that act upon an object?
A. net force
B. absolute force
C. balanced force
D. positive force
Answer:
Net force
Explanation:
Net force is the vector sum of forces acting on a particle or body. The net force is a single force that replaces the effect of the original forces on the particle's motion. It gives the particle the same acceleration as all those actual forces together as described by the Newton's second law of motion.
Answer:
net force
Explanation:
All substances are built from
compound
oxygen
metals
atoms
Answer: All substances are built from
compound
oxygen
Explanation:
All substances are built from atoms as atoms are the basic building blocks of matter and are the smallest units of a chemical element. The correct option is D.
Atoms form the basis of all compounds. The fundamental building blocks of matter, atoms are the smallest units of a chemical element that nonetheless retain that element's chemical characteristics.
Atoms from various elements combine chemically to produce compounds, however compounds themselves are not the basic building blocks.
Although oxygen is an element that is present in several substances, it is untrue to say that oxygen is the primary component of all substances.
Although metals are a specific kind of element, not all substances are made of metals. Thus, the most correct response is that all substances are composed of atoms.
Thus, the correct option is D.
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Your question seems incomplete, the probable complete question is:
All substances are built from
A. compound
B. oxygen
C. metals
D. atoms
What are the building blocks of proteins? If all proteins are made of the same
building blocks, how can there be so many different types of proteins with different
functions?
Answer:
The basic building blocks of proteins are called amino acids. In proteins, amino acids are arranged into a linear molecule called a polypeptide chain. Some proteins only consist of a single polypeptide chain while more complex proteins are made out of multiple polypeptide chains bonded together.
Explanation:Proteins are formed out of long linear molecules of amino acids called polypeptide chains. The identity and function of a protein are determined by its sequence of amino acids and the 3-D structure of its polypeptide chains. Amino acids are stored in DNA in the form of sequences of nucleotide bases.
Some viruses attack cells by inserting their own DNA into the host cells’ DNA. Why might it be simpler for these viruses to attack prokaryotic cells than eukaryotic cells?
A. Prokaryotic cells have less DNA than do eukaryotic cells.
B. The rapid growth of prokaryotic cells generates more viruses.
C. Unlike eukaryotic cells, prokaryotic cells do not have a nucleus.
D. The cell wall in prokaryotic cells is a less effective barrier.
Answer:
C
Explanation:
Because eukaryotes have membrane bound nucleus where they store their generic information
what is the key to natural selection ?
Answer:
Survival of the fittest?
the other liquid waste product in cellular respiration is
Answer: During the process of cellular respiration, carbon dioxide is given off as a waste product. This carbon dioxide can be used by photosynthesizing cells to form new carbohydrates. Also in the process of cellular respiration, oxygen gas is required to serve as an acceptor of electrons.
Explanation: Hope dis helps :)))))
Answer:
the waste products are carbon dioxide and water
The first line of defense involves which structure(s)?
OT-cells
O skin
O blood
OB-cells
Answer:
skin
Explanation:
The skin is vital for our general health and well-being. In addition to acting as the body's first line of defense against bacteria and viruses, healthy skin also maintains fluid balance and helps regulate body temperature. She is very sensitive, she recognizes the slightest touch as well as pain.
As an outer layer that we can see and touch, the epidermis protects us from toxins, bacteria, and fluid loss. It consists of 5 sublayers of keratinocyte cells. These cells, produced in the deepest inner, basal layer, migrate to the surface of the skin. As they do so, they mature and go through a series of changes.
Which of the following statements about eukaryotic cells is NOT
true?
Eukaryotic cells have a membrane-bound nucleus
Eukaryotic cells are more complex than are prokaryotic cells.
Eukaryotic cells are believe to
e evolved more recently than
prokaryotic cells.
Eukaryotic cells are usually smaler than prokaryotic cells
Answer:
Eukaryotic cells are believed to be evolved more recently than prokaryotic cells.
Explanation:
The statement about eukaryotic cells is NOT true - Eukaryotic cells are usually smaller than prokaryotic cells
Cells are fundamental units and are mainly two types eukaryotic cells and prokaryotic. There are various structural and functional differences and similarities found in them.
Prokaryotes and eukaryotic cells have the following difference:
Prokaryotic cells lack a true nucleusProkaryotic cells lack other membrane-bound organelles.Eukaryotic cells have more organelles, enzymes, and molecules, therefore, prokaryotic cells are simpler.Prokaryotic cells are comparatively smaller than eukaryotic cells.Prokaryotic cells are evolved before eukaryotic cells.Thus, the statement about eukaryotic cells is NOT true - Eukaryotic cells are usually smaller than prokaryotic cells
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What are the effects of greenhouse gases on Earth?
Answer:
greenhouse gasses get trapped in the atmosphere and contribute to global warming
Answer: The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without this atmosphere.
Explanation:
What Bacteria is put in yougurt ?
Answer:
food bateria
Explanation:
Someone help me pleaseee with the answers to both of em
To achieve which of the following goals would rotational grazing be most appropriate? (3 points)
-To maximize livestock populations while minimizing costs
-To preserve vegetation and soil fertility of land
-To involve townspeople in the operations of a nearby farm
-To transform an abandoned city lot into a neighborhood garden
Answer:
To preserve vegetation and soil fertility of land
Explanation:
.
A person with a low number of white blood cells could have difficulty in fighting infections and A decrease in the number of lymphoid stem cells could result in a decrease in red blood cell.
What is nucleotide?It is the sub units and buIlding blocks of DNA. It is made up of a five-sided sugar, phosphate group and then a nitrogen base.
These groups make the backbone of the DNA helix. If you look at a DNA helix, they make the side of the ladder or the side portion. They connect to a nitrogen base which make the steps of the ladder. The type of sugar that is used in a DNA helix is called deoxyribose.
Nitrogen bases are the molecules that make up the steps of the ladders. There are four different nitrogen bases, namely; Guanine, Thymine,Adenine and Cytosine.
Pyrimidines are compounds that make a single 6-sided ring. Examples of pyrimidines are Cytosine and Thymine. Purines on the other hand make 5-sided and 6-sided rings.
Therefore, A person with a low number of white blood cells could have difficulty in fighting infections and A decrease in the number of lymphoid stem cells could result in a decrease in red blood cell.
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The air in the thermosphere is composed of atoms of _____ that are very far apart from each other.
Answer:
Explanation:
In the upper thermosphere, atomic oxygen (O), atomic nitrogen (N), and helium (He) are the main components of air.
Which of the following statements regarding prokaryotic and eukaryotic cells is true
Answer:
I would need the statements to answer that. however prokaryotic cells are plant cells and eukaryotic cells are animal cells
Answer:
They are typically smaller than eukaryotic cells. The DNA of a prokaryotic cell is contained in the nucleoid. There are several ways in which prokaryotic cells are different from eukaryotic cells. Firstly, they are generally smaller in size, their organelles are not membrane bound, and they have no nucleus. They, however, share commonalities with eukaryotic cells including the presence of a bilipid plasma membrane, presence of ribosomes and DNA.
Hope this helps, have a great day/night, and stay safe!
HELP!!!!15 POINTS!!!!!!
i think it's f but idk..
Answer:
F is good
Explanation:
Which of the following can cause the extinction of a species?
climate change
catastrophic events
interactions with other species
human activities
Answer: human activities
Explanation:
explain how darwin's journey to the galapagos islands contributed to his creation of the theory of evolutions.
Explanation:
During his visit to the islands, Darwin noted that the unique creatures were similar from island to island, but perfectly adapted to their environments which led him to ponder the origin of the islands' inhabitants.
Among those that struck Darwin so greatly were the finches that are now named in his honor. Darwin would later base some of his thought from the supposing that these finches were all descendents of the same lineage.
Its easy! If right will give brainlist! Don't overthink..:) Just answer
The virtual image changes with the position of the mirror to the eye when the mirror is..............?
Fill in the blanks
Answer:
When the mirror is inside the focal point..?
Which of the following processes begins when a star enters the main sequence?
a
Nuclear fission
b
Nuclear fusion
c
Condensation of a nebula
d
Appearance of a supernova
Answer:
i believe it is B: Nuclear Fusion
Explanation:
Answer:
C. Nuclear Fusion
Explanation:
I am 1000000000% sure this is correctamundo, stay cool, and have a great day!
Bacteria cannot survive in deep ocean areas where no light is present. true or false
Answer:
false on edge
Explanation:
If an organism has 30 chromosomes in its body cells, how many chromosomes would it have in its sex cells (gametes)?
Answer:
15
Explanation:
Gametes have half the amount of dipliod somatic ells
to which class of macromelules do anitbodies belong to
Pls answer now I am giving 40 points
Answer
:proteins
The four classes of macromolecules are carbohydrates, proteins, nucleic acids, and lipids. These biomolecules can also be referred to as polymers. In turn, we will discuss how these four classes of macromolecules are synthesized in the cell from their constituent building blocks or monomers.
Explanation:
Antibody Classes. Antibodies can be divided into five classes—IgM, IgG, IgA, IgD, IgE—based on their physiochemical, structural, and immunological properties. IgGs, which make up about 80 percent of all antibodies, have heavy chains that consist of one variable domain and three identical constant domains.
Answer:
Antibodies are proteins. An antibody (Ab), also known as an immunoglobulin (Ig), is a large Y-shape protein produced by plasma cells that is used by the immune system to identify and neutralize foreign objects such as bacteria and viruses
Explanation:
Explain how diffusion and osmosis are related to the symptoms of cystic fibrosis
Answer:
Answer D
Explanation:
just took the test.
Someone please help!!! Anyone!?!? I'll give A Brainliest
Answer:
These are Punnet squares. The answer for 1 is 50% The answer for 2 is 100%
The answer for 3 is 100%
Explanation:
I hope this helps!! Have a great day!!!
Which one is the correct answer?? The lined squares in the Punnett square represent____.
They represent the parent's genotypes.
Why are packed juices contaminated with yeast
Answer:
It is because yeast is responsible to fix the carbon dioxide.