Answers
Answer:
A
Explanation:
specific immune defense system
Related Questions
Which structure allows
gases and nutrients in
and out of the cell?
A. mitochondria
B. cytoplasm
C. nucleus
D. cell membrane
Answers
The cell membrane allows gases and nutrients in and out of the cell.
The correct answer is option D, the cell membrane. The cell membrane, also known as the plasma membrane, is a vital component of all cells. It serves as a selectively permeable barrier that separates the internal environment of the cell from its external surroundings. One of its crucial functions is to regulate the movement of substances in and out of the cell, including gases and nutrients.
The cell membrane is made up of a phospholipid bilayer embedded with various proteins. These proteins play a role in facilitating the transport of molecules across the membrane. There are two main types of transport across the cell membrane:
Passive Transport: This includes processes like diffusion and facilitated diffusion, where substances move from an area of higher concentration to an area of lower concentration. Small gases like oxygen and carbon dioxide can passively diffuse through the lipid bilayer of the membrane.
Active Transport: This involves the use of energy to move substances against their concentration gradient, from an area of lower concentration to an area of higher concentration. Nutrients and other molecules can be actively transported using protein pumps.
In both cases, the cell membrane is responsible for controlling what enters and exits the cell, maintaining an appropriate internal environment for cellular functions. This selective permeability ensures that essential gases like oxygen and nutrients can enter the cell while waste products can exit. Thus, the cell membrane is a crucial structure that enables the exchange of gases and nutrients required for cellular metabolism and survival.
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1 Both viruses and cells have - A Lysosomes B Mitochondria C Chloroplasts D Proteins
Answers
Explanation:
I think chloroplasts iam not sure
Which of the following statements regarding digestion and absorption of carbohydrates is TRUE? Lactose intolerance results from an insufficiency of the enzyme amylase. Digestible polysaccharides are broken down into the monosaccharides glucose, galactose, and fructose, which can be absorbed. Sucrose is the main form of carbohydrate that can be absorbed by active transport across the intestinal epithelium. Carbohydrate digestion begins in the stomach. Cellulose from plants is a polymer of glucose that can be easily digested and absorbed by the human GI tract.
Answers
Answer:
CARBOHYDRATE DIGESTION AND ABSORPTION
For dietary carbohydrates to be utilized by the body, they must be converted during digestion to monosaccharides. In addition to starch, the other major dietary carbohydrates are the disaccharides lactose and sucrose, and the monosaccharide fructose. The monosaccharides produced by complete digestion of these dietary carbohydrates are glucose, galactose, and fructose.
The digestive process begins with salivary amylase, which randomly cleaves the α-1,4 linkages of starch. Although amylase digestion begins in the saliva, pancreatic α-amylase is more important to the complete digestion of starch (Fig. 19-1). Starch is degraded first to dextrins and then to a mixture of glucose, maltose, and isomaltose (containing the α-1,6 linkages that are not digested by amylase).
The major disaccharidases, located in the brush border of the intestinal lumen, are
•
Maltase—hydrolyzes maltose
•
Sucrase-isomaltase—hydrolyzes sucrose and isomaltose
•
Lactase—hydrolyzes lactose
Whenever lactose goes undigested, it is not absorbed and passes into the large intestine. Here lactose is acted on by the intestinal flora that ferment it, producing large quantities of CO2, hydrogen gas, methane, and organic acids; the last irritate the intestines, increasing intestinal motility. All these products have only one way out. Thus, the symptoms that characterize lactose intolerance are bloating and flatulence and, in extreme cases, a frothy diarrhea. Lactose intolerance is least common in Northern Europeans and their descendants and most common in descendants of Asian, African, and South American origin.
HISTOLOGY
Brush Border Dynamics
The unstirred brush border of the intestinal lumen consists of finger-like processes, known as microvilli, of the surface absorptive cells. Many enzymes associated with the process of digestion and absorption are located on the surface of these microvilli. This allows the products of digestion such as free fatty acids, amino acids, and monoglycerides to be absorbed by the cells rather than be swept into the lumen itself.
Which type of chlorophyll is rare in xanthophyceae and is only determine its two genera
Answers
The correct answer is ' Yellow-green algae'.
Why Xanthophyta are called yellow-green algae?
Xanthophyta A phylum of mostly freshwater organisms of the kingdom Protoctista, traditionally known as yellow-green algae, that possess carotenoid pigments (including xanthins), which are responsible for their color, in addition to chlorophylls.
Is Xanthophyta and Xanthophyceae the same?
Commonly known as yellow-green algae, the Xanthophyta includes one Class, Xanthophyceae, characterized by the following general features: (1) the photosynthetic pigments consist of chlorophyll-a and -e, β carotene and xanthophylls; of these, β carotene is usually present in fairly high concentrations.
What is the pigment of Xanthophyceae?Xanthophyceae is a class comprised of xanthophytes or yellow-green algae. The color is due to the presence of pigments such as xanthophylls and beta carotene. They also have chlorophyll pigments. They have chlorophyll a and c.
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Marie Curie was a famous French-Polish scientist known for her pioneering research on radioactivity. Her work not only brought her fame but her death as well; she developed aplastic anemia due to radiation exposure. She experienced recurrent and prolonged infections (viral, bacterial, parasitic, and fungal). Explain why she suffered from recurrent infections. Be sure to mention the different types of WBC and the relation to the various infections, and the reasons why she lacked the cell-mediated and the humeral response.
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Answer:
because of continous radiation exposure, bone marrow got destroyed and the ability to produce immunity is reduced
granulocytes
monocytes
nk cells
etc
How does human activity harm or benefit the environment?
Answers
Answer: Humans harm the environment in many ways such as overpopulation, pollution, burning fossil fuels, and deforestation. These also, can cause many changes like triggered climate change, soil erosion, poor air quality, and undrinkable water.
Explanation:
Darwin's finches evolved on an island. What is the main reason that islands often provide good examples of evolution?
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Answer:
They allow for automatic biogeographic isolation
This is because particles are close enough that they can slide past each other, which makes liquid pourable. In a solid state, the particles of this element look like this
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How does the environment influence the traits of an individual?
Answers
Answer:
If an organism is living in an unhealthy environment, that could lead to hunger, dehydration, no shelter, and possibly death.
Explanation:
any body come with me for test
Answers
Which statement is true about DNA?It contains the sugar ribose
It contains a base with nitrogen.
Its monomers contain twice as many phosphate functional groups as RNA's monomers
It is a single-stranded macromolecule.
Answers
A DNA molecule is shaped like a _____.
A. Straight Ladder
B. Triple Helix
C. Long thin rod
D. Spiral Staircase
Answers
Answer: D. Spiral staircase
Explanation: Hope that helped you a ton.
PHOTOSYNTHESIS, PLEASE HELP!!! asap
100 POINTS!!
Answers
Answer:
you may need to fact check me
Explanation:
For more info you can check out the calvin cycle and Photosystem I & II Khan academy has great videos on this
.Marcus has $15.00 to spend on fruit. He buys 3 mangoes and spends the rest of the money on grapes. The store charges $0.75 for each mango and $2.50 per pound for grapes
Answers
Answer:
Explanation:
after he spent money on mangoes it was a total of 12.75
so he bought like 5lb of grapes
When scientists refer to the DNA to RNA to proteins pathway, the RNA part really represents three differenttypes of RNA: messenger RNA (mRNA), transfer RNA (tRNA), and ribosome RNA (rRNA). How is each type of RNA important to protein production? ( Will Mark Brainliest and please only answer if your company 100% sure. And Do Not Repost Someone Else's Answer that is on Brainly Or Any Other Websites Please.
Answers
Answer: mRNA is transcribed from DNA and carries information needed for protein synthesis. During the translation phase of protein synthesis, the tRNA carry specific amino acids the the ribosome, and rRNA plays a role in the synthesis of the ribosome which is the site of translation phase of protein synthesis.
Explanation:
. What is the first step of thermonuclear fusion within the Sun to form helium-4?
The fission of hydrogen to form protons and neutrons.
Two lithium atoms, each with three protons and three neutrons, undergo fission to form hydrogen atoms with
Two hydrogen nuclei, each with only one proton, fuse to form deuterium, a form of hydrogen with one protor
O Electrons and protons fuse to form the nucleus of a helium atom.
Answers
Answer:
a nucleus of Deuterium (2H)
Explanation:
formed from two protons with the emission of an antielectron and a neutrino. In the basic Hydrogen fusion cycle, four Hydrogen nuclei (protons) come together to make a Helium nucleus.
5. a. What technology produced the results illustrated here, and what is this
technology used for? (1 point)
Think about the methods used to analyze DNA.
Answers
The technology that was used to produce the results illustrated in the image is gel electrophoresis and it is used for separating deoxyribonucleic acid (DNA) fragments.
Gel electrophoresis can be defined as a technology that is used in the laboratory for the separation of mixtures of deoxyribonucleic acid (DNA), ribonucleic acid (RNA) or other macromolecules such as proteins based on molecular size and charge.
In gel electrophoresis, an electric current is applied to the deoxyribonucleic acid (DNA) samples so as to create fragments that can be used to compare the various samples of deoxyribonucleic acid (DNA).
The steps involved in gel electrophoresis include the following:
Extraction of deoxyribonucleic acid (DNA).DNA isolation and amplification.Addition of deoxyribonucleic acid (DNA) to the gel wells.Application of an electric current to the gel.The separation of DNA bands based on molecular size and charge.Deoxyribonucleic acid (DNA) bands are stained.Read more: https://brainly.com/question/10413501
Why are plants called autotrophs?
A. They have the ability to make their own food
B. They have the ability to flower
C. They have the ability to reproduce
D. They have the ability to decompose matter
Answers
Answer: A. They have the ability to make their own food
Explanation: An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals.
Answer: The correct answer is "They have the ability to make their own food."
Explanation:
I took the test
elect the correct statement regarding the lungs. Select one: a. The left lung is larger than the right lung. b. Only the right lung has a hilum. c. The left lung contains three lobes while the right lung contains two lobes. d. The left lung has more bronchopulmonary segments than the right lung. e. The left lung contains two lobes while the right lung contains three lobes.
Answers
Answer:
The right lung is smaller than the right to make room for the heart.
Explanation:
so the answer is A :)
The left lung contains two lobes while the right lung contains three lobes. Therefore option E is correct.
The statement that the left lung contains two lobes while the right lung contains three lobes is correct.
The right lung is divided into three lobes: the upper lobe, middle lobe, and lower lobe. On the other hand, the left lung is divided into two lobes: the upper lobe and lower lobe.
This anatomical difference is due to the position of the heart, which is located more towards the left side of the chest. The presence of an additional lobe in the right lung allows for a better fit around the heart.
Understanding the lobes of the lungs is important in assessing and diagnosing respiratory conditions and in surgical procedures that involve lung resection or transplantation.
Therefore option E The left lung contains two lobes while the right lung contains three lobes is correct.
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what objects could we find in the troposphere
Answers
Answer:
water vapor, dust and ash particles
Mention the non-living and living characteristics of viruses?
Answers
Explanation:
The Living Characteristics of Viruses are: 1 – They reproduce at a fast rate, only in living host cells. The Non - Living Characteristics of Viruses are: 1 – They are not cells, contain no cytoplasm or cellular organelles.
Hope this helps!!
Describe the rock layers shown in Diagram A and any forces acting on the rock.
Answers
The rock in diagram A has three horizons and no force acts on it.
What is a rock?A rock is a geological term that refers to solid materials, made up of crystals or grains of one or more minerals. Rock is the main material in the Earth's crust.
Four diagrams of the Earth's crust are shown in the image. All four have three horizons and different forces influence them except A. These forces are caused by the movements of the Earth's lithosphere and are represented by arrows in the direction of movement.
In the case of diagram A, having no arrow means that no force acts on it. Additionally, you can see the three horizons or layers that make up this sample of land.
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A significant amount of legislation passed in the 20th century sought to reduce the risk of future economic events like the liquidity crisis
experienced by banks during the Panic of 1907. Which of the following policies would increase the risk of a liquidity crisis?
Answers
The policy which would would increase the risk of a liquidity crisis is Banks
being required to store a smaller percentage of depositor funds in their
vaults.
Liquidity occurs when there is an increase in demand and decrease in
supply. Banks usually have a large percentage of depositor funds stored in
their vault to prevent these occurrence.
In situations whereby they store a smaller percentage of depositor funds in
their vaults , it will lead to a liquidity crisis as they won't be able to cater for
the immediate needs of the depositors.
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Banks are required to store a smaller percentage of depositor funds in their vaults.
Which of the following models shows the flow of energy in a woodland ecosystem? Select the two correct answers A.sun → tree → caterpillar → bird
B.sun → caterpillar → bird → hawk
C.sun → tree → grass → mouse
D.sun → grass → mouse → owl
E.sun → hawk → bird → caterpillar
Answers
Answer:
C and D
Explanation:
Energy flow is the transference of energy through all the links composing the trophic web. The correct options areA and D. A) sun → tree → caterpillar → bird /// D) sun → grass → mouse → owl.
What is the flow of energy in trophic webs?Is the transference of energy through a series of organisms involved in the trophic web.
During energy flow, every link in the trophic web takes energy by feeding on the preceding one and provides energy when becomes food for the next link.
Autotroph organisms take energy from the sun to synthesize organic matter from inorganic matter. Primary consumers take energy from producers.Secondary consumers take energy from primary consumers.And so on, until finally, decomposers take energy decomposing matter.Accordig to this information, the two correct answers are options A and D.
Producer Primary consumer Secondary consumer
A. sun → tree → caterpillar → bird
D. sun → grass → mouse → owl
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why is the dominant allele seen in a heterozygous individual
Answers
Answer: Since it's the DOMINANT allele that means that it will take over reccesive allele that's why it's shown.
Explanation: A heterozygous individual is an individual where the have both the dominant and reccesive allele for a trait. The dominant allele will always be stronger than the reccesive allele. This results in the dominant allele being shown.
4. Is the sugar in the nucleotide to the right deoxyribose or ribose? How do you know?
Answers
Answer:
The pentose sugar in DNA is called deoxyribose, and in RNA, the sugar is ribose.
Explanation:
What is a similarity between phases of moon wi2 and wk 4
Answers
The moon has four phases, which happen in a fixed sequence. Each phase lasts one week and takes place as follows:
1st week - New Moon: At this moment, the part of the moon that is illuminated by the sun is not facing the earth. This prevents the moon from being seen.
2nd week - Crescent Moon: Only ¼ of the moon is being lit by the sun and facing the earth. Therefore, we can only visualize a small part of the moon.
3rd week - Full Moon: The face of the moon that is facing the earth is completely illuminated by the sun, which allows this entire face to be visualized.
4th week - Waning moon: Once again, only ¼ of the moon is lit by the sun and facing towards the earth.
The moon does not have its own light, but reflects the light received by the sun, for this reason, we cannot fully visualize the moon.
PLEASE HELP MEEEEEEEEE
Which option distinguishes the outcome if the Farm Bill were to end subsidies to private growers, but continue to provide food stamp funding?
Wholesale commodities prices would increase and create a devaluing of food stamps.
Food stamp recipients would replace subsidies by spending more money on agriculture.
Farm prices would drop due to a higher supply of unsold goods but no demand change.
Aid would shift and all farmers receiving subsidies would receive food stamps instead
Answers
Answer:
Whole sale commodities price would increase and create a devaluing of food stamps.
Explanation:
If the farm bill were to end then the feature which was to be given to farmers would lost.It will decrease the outcome of commodities to market.Which will raise the price of them.Explanation:
Which option distinguishes the outcome if the Farm Bill were to end subsidies to private growers, but continue to provide food stamp funding?
↪. Wholesale commodities prices would increase and create a devaluing of food stamps.
If we have 46 chromosomes, about how many feet would that be? (Show some math work)
Answers
Answer:
276
Explanation:
Chromosomes are about 6 feet long.
46 x 6
= 276
Which structure is this statement most likely referring to
Answers
Answer:
semipermeable membrane is a large glucose molecule that requires facilitated diffusion but an oxygen molecule does not.