Answer:A
Explanation:because
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:
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.
For more details regarding atoms visit:
https://brainly.com/question/13654549
#SPJ6
Your question seems incomplete, the probable complete question is:
All substances are built from
A. compound
B. oxygen
C. metals
D. atoms
Which is an example of active transport?
a
Cells move sugar into their cells with energy
Water moves from where there is more water to where there is less
b
с
Salt moves from a 15% solution to a 2% solution
d
Dye moves from where it is dropped throughout an entire glass of water
Answer:
с ) Salt moves from a 15% solution to a 2% solution
Explanation:
In active transport, the particles move across a cell membrane from a lower concentration to a higher concentration. Active transport is the energy-requiring process of pumping molecules and ions across membranes "uphill" - against a concentration gradient.Aug 14, 2020
Explain how diffusion and osmosis are related to the symptoms of cystic fibrosis
Answer:
Answer D
Explanation:
just took the test.
Genetic engineering involves _______ to achieve desired results. a. enzyme production b. modifying products and processes c. changing one organism into another d. introducing traits into organisms Please select the best answer from the choices provided A B C D
Answer:
D
Explanation:
the answer is d bruv like fr
Answer:
D
Explanation:
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
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.
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!!!
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
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 can cause the extinction of a species?
climate change
catastrophic events
interactions with other species
human activities
Answer: human activities
Explanation:
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.
Learn more about white blood cells on:
https://brainly.com/question/19202269
#SPJ5
It is not the number of different nucleotides, but the ________________ that is important in the ability of DNA to code for all the variability of organisms.
I'll mark brainlest
Answer:
discupa eu não sei
uma bela noite abençoe
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.
In which cellular organelle is genetic information (DNA) held?
A. Mitochondria
B. Ribosomes
C. Cell membrane
D. Nucleus
Answer: d. nucleus
Explanation:
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.
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 is the key to natural selection ?
Answer:
Survival of the fittest?
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
Learn more about eukaryotic cells:
https://brainly.com/question/773012
Bacteria cannot survive in deep ocean areas where no light is present. true or false
Answer:
false on edge
Explanation:
Hemoglobin is:
1) hormone;
2) Enzyme
3) protein;
4) Amino acid
HELPPP PLEASE!!!!
Answer:
The oxygen- carrying pigment and predominant protein in the RBC.
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:
Why are packed juices contaminated with yeast
Answer:
It is because yeast is responsible to fix the carbon dioxide.
Cellular respiration is a process in which animal cells use ____ taken in from the atmosphere.
1) carbon dioxide
2) hydrogen
3) oxygen
Answer:
How does cellular respiration work in animals?
When an animal breathes, it takes in oxygen gas and releases carbon dioxide gas into the atmosphere. This carbon dioxide is a waste product produced by the animal's cells during cellular respiration. Cellular respiration occurs in the individual cells. Digested foods have chemical energy stored in them.
Explanation:
I could really use some help on this question l, please help!?! Thank you ❤️ much love stay safe 2020
Answer: its B and D
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:
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.
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.
What Bacteria is put in yougurt ?
Answer:
food bateria
Explanation:
HELP!!!!15 POINTS!!!!!!
i think it's f but idk..
Answer:
F is good
Explanation:
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