Answer:
A.Explanation:
TutorialDiffusionDiffusion means that the net movement of particles (molecules) is from an area of high concentration to low concentration.Graph of the simple and facilitated diffusion taking into account the rate of uptake and the concentrationIf the particles can move through the lipid bilayer by simple diffusion, then there is no limit to the number that can fit through the membrane. The rate of diffusion increases linearly as we add more particles to one side of the membrane.If the particles can only pass through protein channels, then the rate of diffusion is determined by the number of channels as well as the number of particles.Once the channels operate at their maximal rate, a further increase in particle numbers no longer increases the apparent rate of diffusion. At this limited rate we describe the protein channel as being saturated.The cartoon illustrates several points about facilitated diffusion. The particles are more concentrated on one side of the membrane, and yet they can move in both directions. However, the net movement is from high particle concentration to low. If the number of particles gets so high on one side of the membrane that they interfere with diffusion through the protein channel, then we observe a limit to the rate of diffusion at the point of saturation.Illustration of facilitated diffusionanimation used with permission of the Virtual Cell Web PageProblem 7 | Answer | Problem 8The Biology Project > Cell Biology > Cell Membranes > Problem SetThe Biology ProjectDepartment of Biochemistry and Molecular BiophysicsUniversity of ArizonaMay 2002Revised: August 2004Contact the Development TeamSimple diffusion does not require energy: facilitated diffusion requires a source of ATP. Simple diffusion can only move material in the direction of a concentration gradient; facilitated diffusion moves materials with and against a concertion gradient.
Answer:
C. a concentration gradient, a protein channel, and no energy.
Explanation:
Facilitated diffusion requires a concentration gradient, a protein channel, and no energy.
This is the name given to all of the water on Earth.
atmosphere
hydrosphere
biosphere
lithosphere
Answer:
Explanation:
hydrosphere
2
since hydro means water btw
please mark brainliest
Which of the following consists of an amino group, a carboxyl group, and a
side chain?
A. DNA
B. An amino acid
C. A nucleotide
D. A carbohydrate
Answer:
An amino acid
Explanation:
the four most common chemical elements found in living matter are
1,C,H,O,P
2,C,H,O,N
3,C,H,N,P
4,C,H,O,S
5,C,H,O,Ca
Explanation:
In all living system we can always find basic elements carbon, oxygen, nitrogen and hydrogen, carbon is the basic building unit contained in living matter. The percentage of carbon in the mass of living matter is 19.0% oxygen and hydrogen are present in almost all organic compound which creates living organisms.
Why a stent is used in the treatment of atherosclerosis in a coronary artery
The stent holds open the narrowed arteries to allow adequate blood to flow to the heart.
A trout moves from a warm environment into a cold environment. Predict how the saturation status of hydrocarbon chains might change to ensure proper membrane fluidity in the new cold environment.
Answer:
The correct answer is - The hydrocarbons would become less saturated to increase the fluidity of the membrane
Explanation:
The ratio of saturated and unsaturated fatty acids or hydrocarbon chains is responsible for the membrane fluidity at cold temperatures. Cholesterol is an important part of membrane fluidity as it functions as a buffer, it inserts in phospholipids to preventing lower temperatures from inhibiting fluidity and at higher temperatures stabilizes the cell membrane and increase melting point and prevent increasing fluidity.
Moving from high temperature to low temperature hydrocarbon chains become less saturated in order to increase fluidity as it inserts cholesterols into phospholipids and decrease saturation.
mass of an object on the moon is 50 kg what is its mass on the earth ?
Will pigs ever fly?
Support your answer with suitable examples.
Answer:
NO
Explanation:
the pigs will never be able to fly as the birds have:
wings – these enable the force of lift.
lightweight, smooth feathers – this reduces the forces of weight and drag
streamlined body – this helps reduce the force of drag (a shape that lowers the friction drag)
light bones – a bird’s bones are basically hollow with air sacs and thin, tiny cross pieces to make bones stronger – this reduces the force of weight
Meanwhile the pig is obviously heavier, having a stronger force of gravity, and does not have the same type of "lightweight" bones that the birds have.
Answer:yes they might
Explanation:
Birds are able to breed with pigs and pigs might get wings
The diagram to the right represents a pair of homologous chromosomes in a diploid cell, and the resulting chromosome in a haploid cell. The letters represent alleles of genes. Why does the chromosome in the haploid cell have alleles from both of the chromosomes in the diploid cell?
Genetic factors allow some species of plants to survive in extreme climates while other plants are unable to grow. True or false?
Answer:true
Explanation: the factors can let the plants adapt to the environment
Hope this helps
35. When substances move in and out of cells using energy this is called:
a. active transport
b. passive transport
c. activation energy
d. selective transport
Answer:
active transport
Explanation:
Active transport is the movement of particles from a region of low concentration to a region of high concentration against the concentration gradient that requires energy.
Select 2 sentences that are correct.
Answer:
option 3 and 5
hope helps you
have a great day
Answer:
Option 3 and 4
Explanation:
All primates share a common ancestor. We share ancestry with primates, but we did not evolve or descend from them. We simply have a close evolutionary relationship.
What is/are the advantages of using nuclear power? CHOOSE ALL THAT APPLY
A) A small amount of fuel can
give a large amount of
energy
B) Generating electricity by
nuclear power produces
radioactive nuclear waste,
C) Generating electricity by
nuclear power gives off no
air pollutants
The tap water is having a pH of 10
True or false
Answer: True
Explanation: Tap water is made slightly alkaline because acidic water could corrode metal pipes. It depends on country how high pH is. In some countries, where metal pipes are widely used pH could be even 10
Can someone help me if this is correct
Answer:
I think your answer is wrong. The right answer is D. Nucleus & Ribosome.
Explanation:
A process that takes place in the cells of all living things: the production of proteins. This process is called protein synthesis, and it actually consists of two processes — transcription and translation. During translation, the genetic code in mRNA is read and used to make a protein. These two processes are summed up by the central dogma of molecular biology: DNA → RNA → Protein. In eukaryotic cells, transcription takes place in the nucleus. During transcription, DNA is used as a template to make a molecule of messenger RNA (mRNA). The molecule of mRNA then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs.
The nucleus contains the cell's DNA and directs the synthesis of ribosomes and proteins. Typically, the nucleus is the most prominent organelle in a cell. Eukaryotic cells have a true nucleus, which means the cell’s DNA is surrounded by a membrane. Therefore, the nucleus houses the cell’s DNA and directs the synthesis of proteins and ribosomes, the cellular organelles responsible for protein synthesis.
21. In 1960, an invasive species of fish was introduced into the stable ecosystem of a river.
Since then, the population of a native fish species has declined. This situation is an example of
an
1) Ecosystem that has recovered
2) Ecosystem altered through the activities of humans.
3) Environmental impact caused by physical factors
4) Ecological niche without competition
6. ¿Cuál de las siguientes moléculas está formada por
glicerol y ácidos grasos?
Azúcares
Almidones
Lípidos
O ácidos nucleicos
Answer:
Lípidos
Explanation:
Define y desarrolla los siguientes términos en tu libreta (escribe sus variantes)
CÉLULAS
NUTRICIÓN
REPRODUCCIÓN
RESPIRACIÓN
ADAPTACIÓN
Elige un ser vivo y desarrolla sus características comunes con el resto de los seres vivos (formado por células, nutrición, reproducción, respiración, adaptación)
Answer:
- Célula >> unidad básica y funcional de todos los seres vivos
- Nutrición >> proceso de toma de nutrientes del medio ambiente
- Reproducción >> proceso de replicación con el fin de perpetuar la especie
- Respiración >> proceso de intercambio gaseoso en organismos superiores
- Adaptación >> mecanismo por el cual los organismos se ajustan a su ambiente
Explanation:
Un mamífero (por ejemplo, un perro) es un organismo multicelular compuesto por diferentes tipos de células especializadas las cuales se asocian para formar tejidos, que a su vez se asocian para formar órganos y finalmente sistemas de órganos. El sistema respiratorio está compuesto por las vías aéreas y los pulmones. Durante el proceso de respiración se produce el intercambio gaseoso de oxígeno (O2) y dióxido de carbono (CO2) entre los pulmones y la sangre. El oxígeno obtenido mediante la inspiración pasa de los alvéolos pulmonares a la sangre para llegar a cada célula del cuerpo, mientras que en cada expiración se elimina dióxido de carbono en el sentido inverso. La nutrición es el proceso de toma de nutrientes mediante el cual el organismo obtiene energía y materia de su ambiente. Durante este proceso, el sistema digestivo incorpora alimentos que posteriormente son descompuestos en moléculas simples conocidas como nutrientes las cuales son absorbidas para finalmente pasar a la sangre y así llegar a cada célula del cuerpo. La reproducción consiste en el mecanismo mediante el cual una especie se asegura su continuidad a través del tiempo. Los órganos reproductores masculino y femenino están encargados de producir células sexuales, es decir, gametos masculinos (espermatozoides) y gametos femeninos (óvulos) que se unen durante el proceso de fertilización para dar lugar a un cigoto que se desarrollará hasta formar un organismo adulto. Finalmente, la adaptación se refiere al mecanismo por el cual un organismo se ajusta a su ambiente. A nivel de especie, la adaptación es una consecuencia del proceso evolutivo por el cual aquellos organismos que se ajustan mejor a su ambiente tienen más chances de sobrevivir y reproducirse, teniendo por lo tanto más chances de transmitir sus genes a la siguiente generación.
define phanerograms with examples.
Answer: Phanerogams are plants that have special structures for reproduction and generate seeds. Also, according to if the seeds are enclosed in a fruit or not, phanerogams are divided into gymnosperms and angiosperms.
Explanation:
Hope it helps you if not sorry
In a population of goldfish, individuals can be colored orange, white, white with orange spots,
orange with black spots, and orange with white spots. What is the best explanation for these
color differences?
kahit kahit po ayaw mona kana kana aaaa
what do the results suggest about ways that milkweed bug populations are limited in nature?
Answer:
Temperature.
Explanation:
Temperature was the only limiting factor that controls and limits the size of the population of milkweed bug in the nature because these milkweed bug are very sensitive to temperature. Little increase or decrease in temperature can cause adverse effect to the population f milkweed bug in that environment. Milkweed bugs need food, water, space, shelter and a mate in order to survive a well as increase in population of milkweed bug.
Which of the following is not a source of genetic variation?
A
sexual reproduction
B
asexual reproduction
C
mutations
D
crossing over during meiosis I
¿Cuáles de las siguientes características permite el intercambio gaseoso entre el Oxígeno (O2) y Dióxido de carbono (CO2) en los alveolos?
Answer:
Difusión y afinidad de la hemoglobina.
Explicación:
La difusión y afinidad de la hemoglobina son las características que permiten el intercambio gaseoso entre el Oxígeno (O2) y el Dióxido de Carbono (CO2) en los alvéolos. Debido a la difusión, las células de hemoglobina descargan o eliminan el gas de dióxido de carbono que es más alto en la hemoglobina en comparación con los alvéolos, por lo que el dióxido de carbono se mueve de la hemoglobina a los alvéolos mientras que, por otro lado, el oxígeno se mueve dentro de la célula de hemoglobina a través de la difusión y la estructura de la hemoglobina atraer y adherir moléculas de oxígeno consigo mismo.
11. Describe how the climate most likely changed between 220 million and 12 thousand years ago
Answer:
The Earth was formed about 4.5 billion years ago—that's a very long time ago! It's hard to say exactly what the Earth's daily weather was like in any particular place on any particular day thousands or millions of years ago. But we know a lot about what the Earth's climate was like way back then because of clues that remain in rocks, ice, trees, corals, and fossils.
These clues tell us that the Earth's climate has changed many times before. There have been times when most of the planet was covered in ice, and there have also been much warmer periods. Over at least the last 650,000 years, temperatures and carbon dioxide levels in the atmosphere have increased and decreased in a cyclical pattern.
These two clue show how the amount of carbon dioxide and the Earth's temperature have changed over the last 650,000 years. Both clue show a similar up-and-down pattern.
People didn't cause the climate change that occurred thousands or millions of years ago, so it must have happened for other natural reasons.
change to passive voice:the police caught the boy red handed
Traditional African marriage is an advantage for men only, not women
Answer:
Explanation:
Traditional marriage is an advantage to men only because they are the only ones who allowed to marry more than one wife (Polygamous) which makes women to be vulnerable. Yet the women are not allowed to be in polyandrous.
PLEASE HELP ME!!
Mental illness is:
A. seen usually only in large metropolitan areas
B. common
C. very rare
D. found only 1 out of 100 adults
AP_EX - *PSYCHOLOGY*
Answer:
B
Explanation: Unfortunately it's common for people .
What is the function of the small, dark organelles labeled E?
Which is a function of the structure that is represented in the image?
Answer:
They assemble amino acids into proteins.
controls the movement of substances into and out of cells
Hoped I helped
Mark me as brainliest
Cells are adapted to perform specific functions. Which of the following terms
refers to this capability?
A Individualization
B. Inheritance
Specialization
D Evolution
Answer:
Specialization
Explanation:
Specialization is the adaptation of an organ or part, to serve a special function or to suit a particular way of life.
Atoms are the most basic unit of matter. Two or more atoms from the same or different elements can combine to form molecules.
Cells are the most basic unit of life. Cells are made up of many different types of molecules. Which of the following accurately shows higher levels of organization within organisms, from least complex to most complex?
A. cells → organs → organ systems → tissues → organism
B. cells → tissues → organs → organ systems → organism
C. cells → organ systems → organs → tissues → organism
D. cells → organs → tissues → organ systems → organism
PLZ EXPLAIN WHY THE OTHER ANSWERS R INCORRECT
Which of the following could be present in a prokaryotic cell? *
Ribosomes
Cell Wall
Cell Membrane
Nucleus
Membrane-Bound Organelles
DNA
Answer:
they actually do not have a nucleas