Answer:
The two most important factors determining the movement of ions across the cell membrane are: the permeability of the molecule in the membrane, and the existence of an energy source.
Explanation:
Ions are charged molecules that, no matter their size, cannot pass through the membrane by simple diffusion because of the nature of the lipid bilayer of the membrane.
Ions can move across the cell membrane in two different ways: passive transport and active transport. The disparity between these two relies on the usage of ATP (energy) - passive transport doesn't need ATP while active transport does. This is where the availability of a source of energy is important, because if there isn't, then active transport is impossible.
On the other hand, ions can move through the cell membrane without the use of energy by diffusing through the membrane with the help of specific membrane proteins that form channels for ions to pass through - and this is where permeability matters: if the cell membrane is permeable to a specific ion, it means that it has opened channels for that ion to use; and this ion will move from one fluid to the other (intracellular or extracellular) following its concentration gradient (for example, sodium is poorly concentrated in the inside of the cell, while is highly concentrated on the outside - this means that sodium will go through the membrane to get inside the cell and even the concentrations between the two fluids, but only if the membrane is permeable to sodium!).
ay whether each of the following situations is an example of altruism or reciprocity. a. Giving a few canned goods to the local food bank for its annual food drive: (Click to select) . b. Helping someone move her couch after she helped you study for an upcoming exam: (Click to select) . c. The biological relationship between cleaner fish and large predators in the ocean, in which cleaner fish keep the predator
Answer:
Altruism
Giving a few canned goods to the local food bank for its annual food driveReciprocity
Helping someone move her couch after she helped you study for an upcoming examThe biological relationship between cleaner fish and large predators in the ocean, in which cleaner fish keep the predatorExplanation:
Altruism is a biological concept used to describe the action of an organism which reduces its own fitness but increases the fitness of another organism. Reciprocity, on the other hand, refers to cooperation between two unrelated organisms in which the beneficial actions of one to the other is reciprocated either in the short or medium term.
Giving a few canned goods to the local food bank for its annual food drive is an action done to benefit those that patronize the food bank without any hope of it being reciprocated. Hence, it is considered altruism.
Helping someone move her couch after she helped you study for an upcoming exam and the biological relationship between cleaner fish and large predators in the ocean, in which cleaner fish keep the predator are both considered reciprocity.
In simple dominance, the dominant trait
a. is masked by the recessive trait
b. masks the recessive trait
Answer:
b. maks the recessive trait
Quick explanation:
The dominant trait masks the reccessive gene, but the person still has the gene, it just won't affect them, it might affect their future generations. For example, the trait for blue eyes is a recessive trait, so in order for you to have blue eyes, both parents will need to have the gene for blue eyes.
Please help!!!!!
Can you please help with the first box in the picture.
Answer:
mRNA: UUU/CUU/GUU/AAG/UUU/AAA/GGU/UGA
Amino Acids: Phe/Leu/Val/Lys/Phe/Lys/Gly/STOP
Explanation:
A-U
G-C
T-A
The increase in the reproductive success of a species will have the greatest impact on the - size of that species’ population. competition within other communities in the biosphere.. success of other populations in the community. tissues that comprise organisms of that species.
Answer:
size of that species’ population.
Explanation:
The increase in the reproductive success of a species will have the greatest impact on the size of that species’ population.
A reproductive success rate means more individuals survive birth and get added to the existing population. The more the number of individuals added to a population, the more the size of the population of the species.
An increase in the population size of a species will only increase intra-species competition for resources but have no real impact on the success of other populations in the community.
Many chemical reactions take place in living things. All chemical reactions have a certain amount of energy that must be supplied in order to make the reaction begin. This is called
Answer:
Activation energy...!
Explanation:
The football team has a total of 25 jerseys . There are 5 mediums-sized jerseys . What percent of the Jerseys are médium-sized Jersey?
Answer:
20% or 0.2
Explanation:
if u divide 5 by 25, u get 0.2, which in decimal form is 20%
What conclusion is best supported by the selection above ? NUMBER 2
Answer:
Arginine and Lysine play same role in membrane proteins.
Explanation:
The scientist have tested Lysine and Arginine to get information about their properties. The test lead to conclusion that both are amino acids which are high in aqueous values which lead to high electrostatic interaction. These amino acids play important role in membrane proteins.
Please help fast!!
CELLS: How is the cell membrane different from a cell wall in its structure and
function?
When organisms break the bonds of organic compounds the organisms can
Answer:
When organisms break the bonds of organic compounds the organisms can gain energy in the form of ATP.
Explanation:
Please I need a comparison table between plant cells and plant tissues
Answer:
Plant tissues are collections of similar cells performing related functions. Different plant tissues will have their own specialized roles and can be combined with other tissues to form organs such as flowers, fruit, stem, and leaves. Two major types of plant tissue include meristematic and permanent tissue.
Meristematic tissue, the primary growth tissue in plants, is capable of self-renewal and indefinite cell division. Every cell in the plant originates from a meristem. Meristematic tissue is classified into one of three types depending on its location inside the plant - apical, lateral, and intercalary. Apical meristems are meristematic tissue located at the tip of root and stem, which enable elongation of plant length. Lateral meristems are present in the radial portion of the stem and root and increase the thickness or girth of the maturing plant. Intercalary meristems occur only in monocots at the base of the internode and leaf blade. The intercalary meristems increase the length of the leaf blade.
Explanation:
I CAN TELL UPTO THIS MUCH.
I HOPE THIS ANSWERS HELPS.
THANK U!
it helps to promoting growth of roots and absorption of nutrients.
Answer:oil is a major source of nutrients needed by plants for growth. The three main nutrients are nitrogen (N), phosphorus (P) and potassium (K). Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur.
simply means lessen the use of unnecessary materials
Answer:
ok
Explanation:
okokokokokokokkokokok0k0k
Reduce: simply means lessen the use of unnecessary materials.
Waste management can be defined as the processes, schemes, activities and actions that are typically required to collect, treat and manage (handle) a waste material from its creation to its final disposal.
Basically, some importance of waste management are:
I. It makes planet Earth free from garbage or waste materials.
II. It promotes a clean, beautiful and healthful environment.
III. It helps to transform garbage or waste materials into something useful through recycling.
The 5Rs of waste management generally refers to an efficient, effective and modern way of managing garbage and waste material, these include:
Refuse.Reduce.Reuse.Repurpose.Recycle.Reduce is a waste management technique which involves lessening the use of unnecessary materials in the performance of a task.
For example, biodegradable materials can be burned to lessen waste.
Read more: https://brainly.com/question/18769370
What is the maximum magnification of most classroom compound light microscopes?
O 100x
O 500x
O 1,000x
O 5,000x
Answer:
C. 1,000x
Explanation:
Answer: 1000x c
Explanation:
Here is what I want you to do. Create a comic strip using one of the following websites. Some of the websites you must pay for, so DON'T PAY for them, just take a screenshot and send it to me in an email.
You can also complete the project using poster board. Either way is fine. Once completed with poster board, you must send it to me by taking a picture through an email.
The key to the assignment is to make sure you will model the structures of the cell and describe their functions. You will do this by completing a table that describes the functions of structures of the cell. The table should also identify factory parts or workers that have similar functions.
The comic strip is just a way to describe the cell structures. It's a scenario (scene) describing the events. The scene is of a reporter who visits a cell “factory” and interviews someone about the structures/organelles and how their roles in the cell are similar to those of a factory and its workers.
Comic Strip Websites:
Answer:
I just did this test the correct one is B.
Docosahexaenoic acid (DHA) is an omega-3 fatty acid essential for brain development during pregnancy and early childhood. It is also linked to improved heart health, better vision, and reduced inflammatory response.
NEED HELP ASAP! 100 POINTS!!
A lab experiment is created to see how the amount of solute affects the temperature needed to dissolve the solute completely. 2, 4, 6, and 8 grams of a salt are place in a small test tube with 15mL of water. The test tubes are then heated until the salt completely dissolves. Unfortunately, the test tube with 8 grams of salt never completely dissolves at any temperature. Suggest two changes to the procedure that might solve this problem.
Answer:
Rise the heat and lower the amount of salt
Explanation:
1. Your arm is made up of four different types of
Answer:
joints or muscles
Explanation:
Answer:
Tissues
Explanation:
connective, muscle, epithelial, and nervous tissue.
we the people of the United states in order to form a more perfect union..."what was the purpose of the introduction that begins with these words?
Answer:
The preamble sets the stage for the Constitution, It clearly communicates the intentions of the framers and the purpose of the document. The preamble is an introduction to the highest law of the land; it is not the law. It does not define government powers or individual rights.
Establish Justice is the first of five objectives outlined in the 52-word paragraph that the Framers drafted in six weeks during the hot Philadelphia summer of 1787. They found a way to agree on the following basic principles:
"We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defense, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America."
I think.
Explanation:
The buring of fossil fuels releases which of the following gases into the atmosphere
what would happen to the smooth er if the rough er was broken
A certain plant species has seeds that remain dormant until heat stimulates them to germinate.
• Describe the process of succession that could occur with this species after a wildfire.
• Identify whether the plant species is dependent on succession events and explain how you know.
Answer:
Explanations: primary succession will take place because these plants will dominate after a wild fire has occured in the area since their growth is stimulated by heat hence the heat will result to the widespread of this type of plant
These plants are indeed dependant on succession events because they are only stimulated to grow through heat events
Secondary succession is that process which occurs after wildfires.
What is Secondary succession?In this type of ecological succession, the plants and animals recolonize a habitat after a major disturbance such as a devastating flood, wildfire, landslide, lava flow, or human activity etc.
Yes, the plant species is dependent on succession events because that event make the environment suitable for the growth of some plants so we can conclude that Secondary succession is that process which occurs after wildfires.
Learn more about succession here: https://brainly.com/question/1212975
Scientists are working with a liquid that is made of only one type of atom. Which statement correctly describes this liquid?
Answer:
b
Explanation:
edge 2021
(True or False) Amino acids are chemicals which link together to make carbohydrates.
Which mechanism best describes the process by which nutrients are taken up at the apical surface of the epithelial cells that line the guy and released from their basal and lateral surfaces?
a. Proteins are tethered to the cell cortex
b. Proteins are tethered to the extracellular matrix
c. Protista are tethered to the proteins on the surface of another cell
d. Protein movement is limited by the presence of a diffusion barrier
Answer:
The correct answer is option d. "Protein movement is limited by the presence of a diffusion barrier".
Explanation:
There are transportation mechanisms that allow to take up nutrients to the apical surface of the epithelial cells. The transportation process is best describes as protein movement limited by the presence of a diffusion barrier. There are structures known as tight junctions, located just below the apical surface . These tight junctions acts as diffusion barriers, separating the extracellular fluids surrounding the apical and basolateral membranes.
Sodium is an example of an alkali metal. The alkali metals are found in the leftmost column of the periodic table, known as Group 1. Use the interactive periodic table to explore the properties of the following alkali metals: lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs). The animations demonstrate a chemical property common to alkali metals: they react with water. How does the reactivity vary among this group of elements? Why might patterns like this be useful to scientists?
Answer:
The reactivity greatens the farther you go down on the periodic table. Lithium will have the weakest reaction, and cesium will have the greatest reaction. Patterns like this are useful to scientists because it shows which elements are the most reactive and which aren't. The farther down and to the left you go within the periodic table, the more reactive the elements become. The farther up and to the right you go, the less reactive they become.
Explanation:
The reactivity of alkali metals increases down the group. Periodic trends help scientists to predict the reactivity of newly discovered elements.
In group 1, reactivity of elements increases down the group because as you go down the group more shells are added thereby making it easier to remove the outermost electron.
This explains the increase in chemical reactivity from Lithium to cesium.
These periodic trends are very important in predicting the chemical reactivity of newly discovered elements that are added to a group.
Learn more: https://brainly.com/question/18153051
Why is RNA important to many chemical reactions in your body?
1. RNA produces lipids so your body can store energy, insulate itself, signal, and make cell membranes
2. RNA produces DNA which is important in guiding many cell processes
3. RNA produces many kinds of carbohydrates to store energy
4. RNA produces many proteins, some of which are enzymes that catalyze many reactions in the human body
Answer:
RNA produces DNA which is important in guiding many cell processes
Answer: RNA produces many proteins, some of which are enzymes that catalyze many reactions in the human body.
Explanation:
I chose the other answer here and it was wrong this is the correct one.
is someone being taller an example of qualitative or quantitative data (ex- i am taller than her)
Answer:
quantitative
Explanation:
because it can be measured (in feet)
Which two factors are responsible for seasons on Earth?
A. Greenhouse gases and ozone in the atmosphere
B. Earth's tilted axis and its rotation around it
C. Trade winds and sea breezes
D. Earth's tilted axis and its revolution around the sun
Answer:
D
Explanation:
The short explanation is how the earth is tilted towards the sun, and it's revolution will cause certain parts to be closer or farther relatively to the sun. Hope this helps
The change in season is brought on by the earth's tilted axis and its revolution around the sun. Therefore, option (D) is correct.
The seasons are caused by Earth's tilted axis. Different regions of the Earth are exposed to the Sun's strongest rays at various times of the year. Therefore, the Northern Hemisphere experiences summer when the North Pole tilts toward the Sun. Additionally, winter in the Northern Hemisphere occurs when the South Pole tilts toward the Sun.
The Northern Hemisphere experiences summer in June because the Sun shines more intensely there than at any other time of the year. The Northern Hemisphere experiences winter in December because it is the month when the South Pole is oriented toward the Sun.
Therefore, option (D) tilted axis and revolution are reasons for the seasons.
Learn more about seasons, here:
https://brainly.com/question/923847
#SPJ5
Suppose you find a yellow piece of metal in a stream. How could you tell if it’s real gold?
Answer:
Bite it, if it is soft then its gold
also if it is not shiny
Explanation:
Match each type of financial institution with its correct description.
Answer:
1. building society
2. trust company
3. asset management firm
4. stock brokerage firm
Explanation:
To change behavior or actions in response to outside conditions 4 Letters. What is the word?
Answer:
The four-letter word which speaks to the ability of an organism to modify its behavior or actions to external stimuli is Move.
Explanation:
Movement gives organisms the ability to move away from or towards an external stimulus depending on whether it is a detrimental stimulus or a favourable one.
Examples of stimuli are:
Light: All organisms respond to the presence of light. Some stay away from it and remain at sleep until the sun goes down. They are called nocturnal. Others gravitate towards it. Plants always grow towards light.Temperature: Some organisms favour cold environments, other the temperate parts of the earthSound: The sound of a carnivorous animal such as the lion will put a deer to flight. The sound of a mother hen calling out to her chicks will attract them to her.Cheers
