The simplest virions consist of two basic components: nucleic acid (single- or double-stranded RNA or DNA) and a protein coat, the capsid, which functions as a shell to protect the viral genome from nucleases and which during infection attaches the virion to specific receptors exposed on the prospective host cell.
Answer:
A
Explanation:
A virus has no nucleus or cell wall but it eats.
Which statement best describes the cell membrane of a living cell?
A) It is composed of proteins and carbohydrates
B) It has the same permeability to all substances found inside or outside the cell.
C) It is a double protein layer that doesn't allow things to pass through it.
D) It selectively regulates passage of materials into and out of the cell..
D) It selectively regulates passage of materials into and out of the cell.
The plasma membrane in a living plant cell is composed of a double lipid layer that gives it hydrophobic character and acts as a semi- permeable barrier. The partial permeability of the substances allows regulating the passage of substances from and to the interior of the cell. At the level of the plasma membrane there are several mechanisms and transport to allow the entry of substances needed for the cell or the output of synthesized products or metabolic waste, thus regulating the passage of substance in a selective way.They keep toxic substances out of the cell.They contain receptors and channels that allow specific molecules, such as ions, nutrients, wastes, and metabolic products.Therefore, correct option is D)
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In a field water flows down through the soil and then throw a layer of loose rocks before the flow stops. what type of material did the water most likely encounter when it stopped
A: A lawyer of granite
B: another soil layer
C: a lawyer of rocks with cracks
D:another lawyer with loose rocks
Answer:
B: another soil layer
Answer:
a layer of granite
Explanation:
That's the correct answer on edge.
22 Carbohydrates perform many metabolic and structural jobs inside the living organisms. An
example of a carbohydrate that provides structural support to cells is –
F chitin, a carbohydrate that strengthens the exoskeletons of insects and other arthropods
Gstarch, a carbohydrate that is used by some plants as a way to store glucose
H cellulose, a carbohydrate that is used by plants to construct the cell wall
J glucose, a carbohydrate that is utilized by all life forms in the construction of nucleotides
Answer:
The answer is J
Explanation:
What are the advantages and disadvantages of gene therapy?
Answer:
Advantage:high transfection efficiency Disadvantage:Better safety profile lower production cost
what percent of radiation from the sun is reflected once it enters the atmosphere?
Glycogen starch and cellulose are examples of
the single main root is called the...
Answer:The first root that germinates from the seed is called‘radical’ The radical develops into single prominent root called as ‘primary or main root’ It is the strongest and grows vertically downwards due to gravitation and deep into the soil Several branches arise from the main tap root known as lateral or secondary roots
Explanation:
Answer:
the taproot
Explanation:
Determine the stimulus, receptor, control center response and effector for gas exchange for plants.
URGENT PLEASE REPLY!!!!
I will give you brainlist
Answer:
receptors of gas connection with hydrogen peroxide and what is meaning of linear equation that
5. What do porifera use their flagella for?
(1 Point)
O swimming
O eating
reproducing
Answer:
Porifera use their flagella to eating.
Explanation:
Porifera are immobile animals, typical of marine ecosystems, also called sea sponges and characterized by a lack of true tissue.
Coanocytes are one of the main cells of the porifers, and they are endowed with flagella that allow them to mobilize the water with food particles towards the microvilli, structures that trap them to be later absorbed.
The flagella play an important role in the feeding of the porifers, by conducting the food to the structures responsible for its absorption and processing.
The other options are not correct:
Porifera is immobile, so the flagella do not participate in swimming.Flagella do not participate in the reproductive process of marine sponges.which type of asexual reproduction takes place in diatom..
(i)fission
(ii)budding
(iii)sporulation
(iv)regeneration
Answer:
Fission
Explanation:
.......(◕ᴗ◕✿)........
Answer:
fission
Explanation:
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Which statement best describes why the body tries to maintain homeostasis?
O The body must maintain homeostasis so that the internal environment matches the
outside environment
The body must maintain homeostasis so that the internal environment stays the same if the outside
environment changes.
The body must maintain homeostasis to make sure that a person's heart and respiration rates are
the same.
Answer:
I would go with B:
The body must maintain homeostasis so that the internal environment stays the same if the outside
Homeostasis is the process of a state of steady internal, mental, chemical, and physical conditions of the body.
The correct answer is:
Option B. The body must maintain homeostasis so that the internal environment stays the same if the outside environment changes.
Homeostasis can be explained as:
It is the self-regulating process in which the body tends to keep the internal, physical, and chemical conditions of the body in a steady and equilibrium state. It generally refers to the stable internal conditions or maintaining the steady phase of the body with respect to changes in the environment. Sweating is one of the processes in which the body tends to maintain homeostasis by releasing excess heat in the hot climate.
Thus, the correct answer is Option B.
To know more about homeostasis, refer to the following link:
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Question 4 (1 point)
What is not a possible source of error?
A. measuring devices have limits, might be broken, or might be calibrated
incorrectly
B. outside factors can affect te experiment (temperature, humidity, light, wind,
C.all answers are sources of error
D. Lap equipment is not always identical (they can vary)
E.people observe things slightly differently and can make mistakes
Answer:
The correct answer is option C. all answers are sources of error.
Explanation:
The major source of error in any scientific experiment includes instrumental error which means that instruments or lab equipment are not accurate or calibrated properly or not able to determine the experiment.
It also includes a human or manual error in observing experiment observation or analyzing or calculating the results. Evolutionary errors are also one of the major sources of error that include humidity, temperature, wind, or light.
Hey I'm Kailey and i need help plzzz asap Based on your study of viruses which of the following is(are) a reason scientists give for saying that viruses are not living organisms?
Question 2 options:
They cannot reproduce without the aid of a host
They use energy but cannot metabolize food into energy
They do not have organized cells
All of the above WILL MARK BRAINLIEST!!!!
Answer:
The answer is that they cannot reproduce without a host or a living organism because by themselves they are virtually harmless
The first answer
Explanation:
what type of cell transport does not require energy
Answer:
Passive Transport
Explanation:
Examples of passive transport-
diffusion of oxygen and carbon dioxide, osmosis of water, facilitated diffusion.List the various forms of nitrogen present in the nitrogen cycle
In the atmosphere, nitrogen exists as a gas (N2), but in the soils it exists as nitrogen oxide, NO, and nitrogen dioxide, NO2, and when used as a fertilizer, can be found in other forms, such as ammonia, NH3, which can be processed even further into a different fertilizer, ammonium nitrate, or NH4NO3.
What is used to make progestogen, a hormone?
Answer:
Crinone and Prometrium, are made from a chemical called diosgenin that is isolated from wild yam or soy. In the laboratory, this constituent is converted to pregnenolone and then to progesterone
Explanation:
Answer this will mark brainliest
Answer:
D. 0 K (kelvin)
This is absolute zero, and nothing can go below this.
0 K is equal to -523 degrees Fahrenheit
what is the living planet called?
Which living planet? Do you mean Earth or what ever else?
Answer:
Earth
Explanathope its the awnser you need
Hello, can someone please give ideas on a create cell analogy title, it's for my cell project. The title should be on cell analogy and should be creative, including the word "cell" in it. Thank you ;)
Answer:
try using calligraphy pens or tell someone to write it for u in calligraphy
Which process makes four daughter cells that are different than the parents cell
Could someone help me please
A major reason that humans have negatively affected the environment in the past is that humans have
Answer:
Explanation:
attempted to control their population growth
The fact that people have historically prioritized short-term benefits above long-term sustainability is a significant factor in how severely humans have impacted the ecosystem.
Thus, human actions like deforestation, pollution, overfishing, and the burning of fossil fuels have historically been motivated by short-term economic or resource requirements without taking the long-term effects on the environment into account.
The stress on ecosystems and natural resources has grown due to population expansion and rising demand. Unsustainable practises, insufficient regulation, and a lack of awareness have all contributed. To solve these problems, we need to adopt more environmentally conscious behaviors by raising public knowledge of environmental issues.
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How does the property of cohesion make farming possible?
Answer:
cohesion refers to the attraction of molecules for other molecules of the same kind, and water molecules have strong cohesive forces to make the crops grow faster
Explanation:
Answer:
Cohesion is the forces holding water molecules together. This concept was covered when talking about properties of water and capillary action. You may remember capillary action is like when you have a little bit of water in the bottom of your cup but the water in the straw is a little bit higher than the water in the cup. Because water is polar - meaning it has a somewhat negative end and a somewhat positive end - it is attracted to other water molecules and other substances, such as the straw.
Cohesion
Now, you may be asking yourself: what does a straw have to do with xylem? Well, just like the water moving up the straw, water moves up xylem. The movement of water in plants is from the roots up through the shoot and out the leaves. Part of the reason for this movement of water is cohesion. The water molecules within the xylem tend to stick together, which allows them to help pull other water molecules up through the xylem - even against the flow of gravity.
When water is moving through the xylem, it is moving between different vessels or tracheids. It is very important that these elements are tightly held together because if there are air bubbles, the effects of cohesion are diminished. That is, if air bubbles get into the xylem, the water will no longer move up through these tubes. We can relate this idea back to our straw. If you have ever had a straw that has even a tiny hole in it, you know that it is very hard - even with the aid of suction - to get the water through the straw and up to you. This is what happens if air bubbles get into the tubes of the xylem.
So , indirectly cohesion helps in farming through xylem....
Media consumption is the:
A. Number of meals a person eats while using media.
B. Amount of money someone spends on networking devices.
C. Amounts of media a person uses on a regular basis.
D.number of media devices that are for sale online.
Answer:
C.
Explanation:
Media consumption is defined as the sum of information and entertainment media taken in by an individual or group.
In the process of cellular respiration humans produce carbon dioxide. Plants use the carbon dioxide in photosynthesis and produce oxygen for humans what type of symbolic relation is this
Answer: Photosynthesis and respiration
Explanation: The essential processes that allow life to exist. When we breathe out, the carbon dioxide that is produced is goes to the plants and their roots to produce sugars, which can be used by the plant to create oxygen. Hope this helps! :)
What happened to the cheetahs?
Answer:
Explanation:
The chief threats to the cheetah's existence are loss of habitat, poaching and hunting (their hide and trophies can command top dollar), and getting shot by livestock farmers. Decline of gazelles, wildebeests, impalas and other preferred prey species (also due to hunting and habitat loss) is a factor, too.
There are various subspecies of cheetah. So the cheetah's disappearance would have differing effects in each case. In general terms, however, the cheetah is a predator and hunter at the top of the food chain, so its disappearance would impact its prey and so on down the line.
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help please biology work
Answer:
C. Student 2
Explanation:
The community is the sum of all of the different populations in an area. All of the biotic(living) components of an ecosystem.
The only answer with more than one organisms is student 2's observation.
What is the best definition for ecosystem
Answer: An ecosystem is a biological community of living organisms that are interfacing with the nonliving components of their environment, interacting as a system.
Which is not a topic of biology?
a. the relationship between fungi and trees
b. the distribution of sand on an ocean floor
c. the chemicals at work in the stomach
d. the speed at which a hummingbird flies
Answer:
B the distribution of sand on an ocean floor
Explanation:
Which statement about ATP molecules is true?
A. The bond between the second and third phosphate group is most easily broken.
B. The bonds between phosphate groups form a ring structure
C.The addition of a phosphate group converts ATP to ADP
D.The removal of a phosphate group converts ATP to a higher-energy molecule.