Answer: The hydrophilic tails are directed inward and the hydrophobic heads are directed outwards.
Explanation:
A phospholipid is made up of two ends a hydrophilic or water-loving end that is phosphate head and a hydrophobic tail that is made up of fatty acid tail. The arrangement of phospholipid in a bilayer structure allows the entry of oxygen, carbon dioxide, and lipids to pass through them via concentration gradient via simple diffusion.
Lipids are amphipathic molecules that compose the membrane. Membrane lipidic bilayers allow only the hydrophilic heads to interact with water inside and outside the cell, while hydrophobic tails remain in the interlayer space, away from water.
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Two lipidic layers compose the cell membrane. There are also proteins and glucans incrusted in between.
Since lipids are amphipathic molecules with hydrophilic heads -negatively charged phosphate group- and hydrophobic tails, they need to form two opposite layers.
Lipids are arranged with their hydrophilic polar heads facing the exterior and the interior of the cells in contact with water. Meanwhile, their hydrophobic tails are against each other, constituting the internal part of the membrane.
Membranes are fluid, meaning that lipids and proteins composing them can move laterally, transversally, or rotationally.
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. the negatively charged part of an atom
Answer:
Electrons are the negatively charged particles of an atom. Together, all of the electrons of an atom create a negative charge that balances the positive charge of the protons in the atomic nucleus. Electrons are extremely small compared to all of the other parts of the atom. The mass of an electron is almost 1,000 times smaller than the mass of a proton.
Explanation:
I hope this helped!
Did John Dalton use an observational study, a controlled experiment, or a mathematical model?
Answer:
we need a picture! if you provide one, then i can help in comments
Explanation:
Exercise
1. Which of the following statements about genetic engineering is not true?
A It is used to change an organism and give it new characteristies that people want.
B It inroles changing the genetic material of an organism.
C It can be used to produce crops that are resistant to disease.
D It does not allor genes to be transferred from one type of organism to another.
Answer:
d I guess.............
The following statements about genetic engineering is not true it does not allor genes to be transferred from one type of organism to another.
What is genetic engineering examples?Genetic engineering is one of the main pillars of biotechnology, which consists of a set of techniques for manipulating DNA through its recombination, with the objective of manufacturing improved organisms, aiming at the improvement or genetic structuring of a certain species, whether plant or animal.
Thus, the only alternative that does not represent genetic engineering is
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Study Finds Aardvarks Suffering as African Climate Heats Up
Little is known about Africa's elusive aardvarks, but new research says they are vulnerable to climate change like many other species.
Hotter temperatures are taking their toll on the aardvark, whose diet of ants and termites is becoming scarcer in some areas because of reduced rainfall.
Drought in the Kalahari Desert killed five out of six aardvarks that were being monitored for a year, as well as 11 others in the area.
The aardvarks' body temperatures plummeted during the night because they were not getting enough energy from diminished food sources. They tried to conserve energy by looking for insects
during the warmer daytime, but their efforts to adapt could not save them
Researchers said some birds, reptiles and other animals use aardvark burrows to escape extreme temperatures, reproduce, and hide from predators. They could have fewer refuges available ir
aardvark populations shrink because of rising temperatures, they said.
The aardvark, which lives in many parts of sub-Saharan Africa, is identified as an animal of "least concern on an international "red list of threatened species. There are no indications that the
population is changing significantly in southern Africa, though it is speculated that numbers may be declining elsewhere because of habitat destruction, the bushmeat trade and other factors.
Study Finds aardvarks suffering as African climate heats up. Christopher Torchia, Phys.org, July 31, 2017
Which of the following best identifies the author's claim?
The option that identifies the author's claim is B. Aardvarks are a keystone species and their decline could have a trophic cascade effect on the ecosystem.
The claim of an author simply refers to what the author is trying to point out. Here, the claim of the author is that aardvarks are a keystone species and their decline could have a trophic cascade effect on the ecosystem.
The author stated that aardvarks are vulnerable to climate change like many other species and this could lead to their reduction. Some birds, reptiles and other animals use aardvark burrows to escape extreme temperatures, reproduce, and hide from predators. Therefore, the reduction of aardvarks will have a negative effect on the population of such animals.
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They are a keystone species, aardvarks' extinction might cause an ecosystem-wide cascade of trophic levels. The correct option is B.
Thus, An author's claim simply refers to what the author is attempting to make a point about. Aardvarks are a keystone species, according to the author, and their extinction could have a negative trophic cascade effect on the environment.
According to the author, aardvarks, like many other species, are susceptible to climate change, which could result in a decline in their population.
Aardvark burrows are used by some birds, reptiles, and other creatures as a refuge from harsh weather, a place to mate, and a place to hide from raptors. Aardvark populations will therefore be negatively impacted by the decline in aardvarks.
Thus, They are a keystone species, aardvarks' extinction might cause an ecosystem-wide cascade of trophic levels. The correct option is B.
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corruption is also shaped by our tolerance or our approach to answering societal problems
Yaa that's true...I totally agree with it
Yes, corruption occurs due to the tolerance of people.
Yes, corruption is shaped by our tolerance because the corrupt people do corruption when they know that people can't do anything or they are not arrested for their corruption then they do corruption. this is our tolerance which give them opportunity to do corruption.
If the people punished such type of person in public then no person will do corruption and the country or society experience more growth so we can say that corruption occurs due to the tolerance of people.
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how is the mode of a date set defined. it is the middle value of the set. it is the most common value in the set. it is the average of the different values in the set. i’d is there difference between the highest and lowest values of the set
Answer:it is the most common value in a set
Explanation: since we know to find the mode you group each number and count which one has the most
Mutations are important because they bring about
A) death if the organism in which they develop
B) genetic variation needed for a population to evolve
C) benefits for the individual, not for the population
D) hardey-weinberg equilibrium within a population
Answer:
B) genetic variation needed for a population to evolve
Explanation:
Mutations are important because they bring about the genetic variation needed for a population to evolve.
Mutation brings about changes in the DNA sequence of an organism. Most times, mutation results when an organism tries to adapt and evolve to unfavorable conditions. Mutation can originate from mistakes in DNA sequencing. It can also be due to environmental influences.what cell structure is responsible for translation?
Answer:
Ribosome
Explanation:
The entire process is called gene expression. In translation, messenger RNA (mRNA) is decoded in a ribosome, outside the nucleus, to produce a specific amino acid chain, or polypeptide. The polypeptide later folds into an active protein and performs its functions in the cell.
Answer:
Ribosomes
Explanation:
The light-dependent reactions of photosynthesis do not include:
A.) chemiosmosis
B.) carbon fixation
C.) transformation of light to chemical energy
D.) electron transport
Answer:
electron transport
Explanation:
Why does herding help a horse survive better?
Answer:
In natural environments, horses typically live in relatively stable social units. Horses live in herds so that they are able to fulfil their basic needs, which are to avoid danger or harm, and to reproduce successfully and bring up healthy foals.
Cells contain special ____
Answer:
organelles
Explanation:
Cells also contain the body's hereditary material and can make copies of themselves. Cells have many parts, each with a different function. Some of these parts, called organelles, are specialized structures that perform certain tasks within the cell.
The percentage of water in an animal cell?
Answer:
75 percent of water in the animal cell
1. In cabbage butterflies, White wings are dominant to yellow wings. If a Ww butterfly is crossed with a ww butterfly, what are the possible genotypes and phenotypes of the offspring and the percent chance for each?
Answer:
Ww, Ww, ww, ww, or two white-winged butterflies and two yellow-winged butterflies
Explanation:
Using the Punnett square, we can determine the possibility of white-winged and yellow-winged offsprings.
Proteins go to the _____ for packaging.
Prokaryotes and eukaryotes are similar in all of these aspects except.
eukaryotes have nuclei
BioWhy would it be hard to find the ideal CO2 level of the light intensity we’re very low?
Answer:
It would be difficult to find the ideal CO2 level with a low light intensity because the plant will have a difficult time trying to survive.
Explanation:
Rocks, as they are compressed, begin forming mountains above the Earth's surface when two continental plates converge. The continental crust increases in depth as the mountains grow above. The Himalayan Mountains formed at a convergent plate boundary in this manner. The rocks are smashed together causing them to __________ due to the intense heat and pressure from the colliding plates and eventually forming _____________ rock.
Answer:
recrystallize
metamorphic
Explanation:
Rock can simply be defined as that which is formed from the remainis of plant and animals which has undergone decay. It is said to be nature solid mixture of one or more minerals or organic matter.
metamorphic rock is one of th types of rock. It occurs or forms from an other already existing rock that is acted upon and change occurs to it as a rest of heat, pressure, or chemical reaction.The Himalayan Mountains is located in the asian.
Whats is a difference between prokaryotic and eukaryotic cells?
Answer:
All cells have a plasma membrane, ribosomes, cytoplasm, and DNA. The plasma membrane, or cell membrane, is the phospholipid layer that surrounds the cell and protects it from the outside environment. Ribosomes are the non-membrane bound organelles where proteins are made, a process called protein synthesis.
Explanation:
write the names of Institute which involved in research of viruses
plz tell me fast
Answer:
The National Institute of Virology, Pune is an Indian virology research institute, and one of the translational science cells part of Indian Council of Medical Research (ICMR). It was previously known as 'Virus Research Center' and was founded in collaboration with the Rockefeller Foundation.
Damage to the auditory nerve or to the hair cells in the inner ear results in
A. Ménière's disease
B. sensorineural hearing loss
C. conductive hearing loss
D. otitis media
Please select the best answer from the choices provided
Answer:
B. sensorineural hearing loss
Explanation:
Damage to these hair cells results in decreased hearing sensitivity, and because the inner ear hair cells cannot regenerate, this damage is permanent.
Damage to the auditory nerve or to the hair cells in the inner ear results in sensorineural hearing loss. Thus, the correct option is B.
What is the Auditory nerve?The auditory nerve may be defined as a cluster of nerve fibers that transport hearing information between the cochlea and the brain.
When the auditory nerve or hair cells are damaged due to any injury or other reasons, it can lead to a reduction in hearing sensitivity.
The cells of this region are unable to regenerate, and hence this damage will remain permanent, and sensorineural hearing loss will result in this scenario.
Therefore, the correct option for this question is B.
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Which of these lists shows ONLY prime numbers?
OA
3, 9, 7, 11, 13
OB. 2, 8, 19, 13,7
OC.
7, 2, 3, 19, 13
OD
12, 13, 17, 11
Answer:
OC is the right answer.
Explanation:
how does carbon from the carbon cycle leave the ecosystem?
A man is 1.7 m long. An amoeba is 17 um long. How does the length of the
man compare to the length of the amoeba?
What would be the most likely outcome for plants on Earth if glucose molecules in cellulose were not arranged in an alternating pattern?
Plants would not be able to create polysaccharides.
Plants would not have the structural support they need.
Plants would not be able to produce chlorophyll.
Plants would not be able to store starches.
why must meosis and not mitosis be used to produce gametes
answer and explain
20 POINTS!!!!
Answer:
Explanation:
Meiosis only occurs in reproductive cells, as the goal is to create haploid gametes that will be used in fertilization. Meiosis is important to, but not the same as, sexual reproduction. Meiosis is necessary for sexual reproduction to occur, as it results in the formation of gametes (sperm and eggs).
Answer:
ten points each does not mean 20 points each
Explanation:
The difference between osmosis and active transport is that-
Osmosis is the diffusion of water across a membrane, where the water at a higher concentration naturally moves to the side of the membrane that has a lower concentration to even it out. Active transports move any ions or molecules, not just water, and require energy to move in and out of a membrane.
Hope this helps! Feel free to simple it down in your answer :)
Which cell has both a cell wall and a cell membrane?
please answer quickly its urgent
Answer:
Plant Cell
contains both
5. What is another possible analogy that could be compared with the structure and function of a cell?
Answer:
hope it helps you❤❤❤
Explanation:
The structure and function of an airport and control tower are compared to the structure and function of a cell.
I’m in the 2nd column, 4th row, and I’m a metal. Who am I?
2. I’m a very lonely nonmetal. Who am I?
3. I’m the only metal who is a liquid at room temperature. Who am I?
4. I’m named after the person who created the 1st Periodic Table. Who am I?
5. I have 92 protons.
pls help asap
Answer:
1. Calcium 2. HYDROGEN 3. Mercury 4. Mendelevium 5. uranium
Explanation:
Which of these is not a characteristic of life
A- oxygen usage
B- an organism consists of on or more cells
C- use of energy and metabolic processes
D- ability to reproduce
Answer:
D- Ability to reproduce