Answer:
Diffusion through a semi-permeable membrane
Explanation:
A membrane that would only allow water, ions and certain molecules to pass through it by diffusion while restricting other large molecules molecules from passing through is called semi-permeable membrane
The iodine molecules were dissolved in the water in the beaker to form iodine solution.When the starch in the tubing was immersed into the red iodine solution, the molecules of iodine diffuse across the tubing walls which acts as the cells membrane -selectively permeable membrane to react with the starch solution. The reaction turns the starch blue black
The characteristic of the cell membrane is due to the lipid bi-layer which allow certain substance pass through while restricting others because of the inner hydrophobic (water hating) and outer hydrophilic phospholipid layer. (water loving layer)These forms the double bi layer to selectively control the movement of substances across it.
Advances in technology have helped many industries, including agriculture. Which agricultural application is most
likely to be affected by new advances in DNA technology from the Human Genome Project?
a researcher who is investigating selective breeding of livestock
O a farmer who is planning a harvest schedule for genetically modified crops
O a plant scientist who is modifying the genetic information of crop plants in a laboratory
O a conservationist who wants to find water sources in drought-prone places
Answer:
a plant scientist who is modifying the genetic information of crop plants in a laboratory
Explanation:
just took the quiz on edg it was correct
true / false A selectively permeable membrane allows all molecules to cross.
It serves as passage way of air into the lungs
Answer:
air travels down the pharynx (back of the throat), passes through your larynx (voice box) and into your trachea (windpipe). Your trachea is divided into 2 air passages called bronchial tubes. One bronchial tube leads to the left lung, the other to the right lung
Explanation:
Trachea
Explanation:
The trachea, commonly called the windpipe, is the main airway to the lungs. It divides into the right and left bronchi at the level of the fifth thoracic vertebra, channeling air to the right or left lung. The cartilage in the tracheal wall provides support and keeps the trachea from collapsing. The mucous membrane that lines the trachea is similar to that in the nasal cavity. Mucus traps airborne particles and microorganisms, and the cilia propel the mucus upward, where it is either swallowed or expelled.
12, What is a Control in an experiment?

Answer:
the factor that stays the same and doesnt change, its used to compare data between different variables
Explanation:
Cells can appear in which of the following shapes:
A. Star
B. Column
C. Cube
D. All of the above
Mitosis is an example of which type of
process?
A. asexual
B. sexual
C. nonsexual
Answer:
The type of process is Asexual.
Explanation:
Because within simple living organisms, mitosis is a type of asexual reproduction .
Mitosis is an example of an asexual process. Thus, the correct option is A.
What is Mitosis?Mitosis may be defined as a type of cell division in which the parental cell is divided into two daughter cells. Both synthesized daughter cells have the same kind and number of chromosomes.
In mitosis, the cell first makes the division of the nucleus and process known as karyokinesis, then the division of cytoplasm takes place and process known as cytokinesis.
And thus, the parent cell successfully divides itself into two daughter cells that are identical to one another.
Therefore, it is well described above.
To learn more about Mitosis, refer to the link:
https://brainly.com/question/815049
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The cubic shape of a mineral crystal is most likely
the result of that crystal's
(1) hardness
(2) density distribution
(3) internal arrangement of atoms
(4) intensity of radioactive decay
help!!
Describe how temperature influences chemical changes.
HELPPPPPP!!!!!!!! ASAP!!!
Which cell organelle contains the chromosomes during interphase?
peroxisome
vacuole
mitochondrion
nucleus
centriole
State whether the following are Tue or False
5. Ice is solid whereas snow is the semi-solid form of water.
6. Ocean water cannot be used for domestic purpose
7. The process of seeping of water into ground is called filteration
8. 51% of the earth’s surface is covered with water
9. Year 2003 was observed as the International Year of Freshwater
Answer:
5 true
6true
7true
8true
9true
A hypothesis _____. A.must be proven true for the experiment to be meaningful B.is based on data analysis C.is developed after the experiment is designed D.is a reasonable answer to a question
Answer:
D
Explanation:
A hypothesis is a reasonable answer to a question.
Why are theories sometimes disproven?
A. New discoveries show they are incorrect.
B. The scientific method changes over time.
C. Mathematical formulas are frequently updated.
D.Few theories from previous eras are actually valid.
Answer:
Theories are sometimes disproven because new discoveries show they are incorrect.
Explanation:
In science, theories constitute the explanations to natural phenomena, with an experimental base and whose variables are congruent, allowing to make inferences, explanations and to raise predictions of the reality to which this theory is applied.
All theories are susceptible to be refuted or substituted by a more solid approach. A theory is maintained and is valid only until new experiments or established theories detract from its validity or substitute it.
Other options are not correct because:
B. The scientific method does not experiment changes over time.
C. Updated mathematical formulas do not relate to the validity of a theory.
D. It is unlikely that theories from other eras are currently valid.
Answer:
D. Few theories from previous eras are actually valid.
Explanation:
Can someone help me please❤️
Answer:
click on the boxes and then show us cuz i cant help with just that
Explanation:
Which statement correctly describes both gases and liquids?
Their shapes stay the same in any container.
Their shapes change when they are in different containers.
Their volumes stay the same in any container.
Their volumes change when they are in different containers.
Answer:
B.
Explanation:
Their shapes change when they are in different containers.
(Also, nice pfp)
In this experiment, the
was intentionally manipulated. It is the independent variable.
The dependent variables that were measured were the
Answer:
wavelength and diffraction angle
Explanation:
got it correct on edge 2020
Answer:
the correct answer is actually, 1. tempature and surface area. 2. time of the reaction.
Explanation:
...
What is the end result of meiosis?
four identical daughter cells
four different daughter cells
two identical daughter cells
two different daughter cells
Answer:
four identical daughter cells
Explanation:
Answer:
(A) or four identical daughter cells
Explanation:
Took the test
I would be very grateful is you can help me!
Answer: Chemoautotroph
Explanation:
Parathyroid hormone (PTH) is secreted in response to a drop in calcium levels in the blood. The secretion of PTH is regulated by a negative feedback mechanism. What can you expect to happen to calcium blood levels as increased amounts of PTH are secreted? Why
Answer:
An excess of calcium in the blood produces a disorder called primary hyperparathyroidism.
Explanation:
Calcium is a mineral found mostly in bones, where it builds up and keeps them strong. There is also a small amount of calcium in the muscles and blood cells, where it performs several important functions. When the calcium level is low, the parathyroid glands (four small glands located in the neck) produce a hormone called parathyroid hormone. Its main metabolic function is to maintain the levels of ionic calcium in the blood and phosphate within normal limits. Hyperparathyroidism is a disorder that lies in the parathyroid glands themselves, in such a way that an excessive and autonomous secretion of parathyroid hormone is produced from them, which changes the metabolism of calcium producing hypercalcemia and bone structural alterations. It is usually caused by the presence of autonomous adenomas, which affect a single gland. Excess calcium in the blood can lead to osteoporosis (weakening of the bones) and kidney stones.
Clownfish make their homes among the stinging tentacles of sea anemones. The clownfish gain protection from predators while attracting prey for the anemones to eat. Why is this an example of a mutualistic relationship? *
• The clownfish benefit but the anemones are not affected
• The clownfish and anemones both benefit
• The anemones benefit but the clownfish is not affected
• The anemones are harmed by clownfish
compare and contrast the different types of heterotrophs Use the terms Carnivore, herbivore, and omnivore in your discussion to get full credit.
Answer:
I'm not sure if your asking about a A, B, C, D question but, as far as I can tell this is what I know
Explanation:
(:Comparing:) Heterotrophs occupy the second and third levels in a food chain, a sequence of organisms that provide energy and nutrients for other organisms. ... Herbivores—organisms that eat plants—occupy the second level. Carnivores (organisms that eat meat) and omnivores (organisms that eat plants and meat) occupy the third level.
(:Contrasting:) Examples include plants, algae, and some types of bacteria. Heterotrophs are known as consumers because they consume producers or other consumers. ... Herbivores—organisms that eat plants—occupy the second level. Carnivores (organisms that eat meat) and omnivores (organisms that eat plants and meat) occupy the third level.
Hope this helps.
Heterotrophs are organisms that depend on external sources for their foods. They are as opposed to autotrophs which have the capacity to produce their own foods via photosynthesis.
Heterotrophs are of 4 types mainly:
Carnivores: they feed on animals either by hunting and killing them (predators) or by feeding on carcasses (scavengers). Some feed on insects (insectivores)Herbivores: they feed on herbs or plants generallyOmnivores: they eat both plants and animalsDetritivores: they eat dead or decaying plants or animalsHence, apart from the fact that all heterotrophs depend on external sources for their foods, they differ based on the type of food they eat.
More on heterotrophs can be found here: https://brainly.com/question/7695115
Which of the following cell structures are NOT found in animal cells
Many small vacuoles
Chloroplasts
Endoplasmic reticulum
Nucleus
The answer is:
Many small vacuoles and chloroplast.
Hope this helps! :)
Question 1: pH
To begin with, you remember that acids are at a pH below 7, bases are above 7, they turn litmus paper red or blue, and water is neutral. To further brush up your memory, you can refer to buffers. You decide to investigate further. Run the pH simulationand open the ‘Micro’ investigation. Notice on the simulation screen:
The pull down menu of substances at the top right
The 3 adjustable faucets on the right
pH scale in the middle
water components on left
Look at how the settings change with different substances.
Choose a substance such as battery acid (a 1.0 molar solution) with a pH of 1.0. Check the molecule and ratio boxes on the bottom of the screen.
Your objective is to discover what happens to the pH of battery acid when it is diluted with water. To find out, adjust the amount of battery acid to 0.5 liter (bottom faucet) and add water (top right faucet) to restore the volume to 1.0 liter (0.5 M). Record your answers for each of the following questions.
Part A
What happens to the pH of the battery acid?
Answer:
The battery acid will turn litmus paper blue to red or red litmus paper will be stay red
Explanation:
Why do objects collide in space?
A. Electrical Currents
B. Energetic Fields
C. Gravitational pull between objects in space
What are two types of animal behaviors aimed at getting food?
Explanation:
and please make me brain list if the answer is right
The active transport pump used to move sodium ions across the membranes of gill cells in a freshwater fish has each of the following characteristics EXCEPT
IT USES OSMOSIS TO CARRY SODIUM IONS INTO THE CELL.
The active transport pump that is used to move sodium ions across the cell membranes of gill cells in freshwater fish has the characteristics of active transport system except that it uses osmosis to carry sodium ion into the cell.
During the process of active transport, there is use of energy by a protein pump in the form of ATP,this protein pump is to move molecules from an area of low concentration to an area of high concentration.
A good example of this active transport system is the sodium-potassium pump,this sodium-potassium pump moves sodium ion to the outside of the cell and moves potassium ion to the inside of the cell.
So that rules out the option stated above because it uses osmosis to move sodium ions into the inside of the cell instead of moving it outside the cell.
This question is incomplete because it is lacking the necessary answer options, which I have provided below:
A. It uses osmosis to carry sodium ions into the cells.
B. It requires energy.
C. It has a specific binding site for ATP.
D. It has a specific binding site for sodium ions.
So, given your question, the answer option which is not a characteristic of the active transport pump used to move sodium ions across the membranes of gill cells in a freshwater fish is: A. It uses osmosis to carry sodium ions into the cells.
A freshwater fish refers to the species of fish that spend a critical part or all of their lives in lakes, rivers, wetlands, etc., with a salinity level of less than one (1) percent.
Cell transport can be defined as the movement of ions, molecules, or substances across the cell membrane, either into or out of the cell of a living organism.
Basically, there are two (2) main types of cell transport and these include:
Passive transport: it involves the movement of substances across the cell membrane with the concentration gradient.Active transport: it involves the movement of substances across the cell membrane from a region of lower concentration to a region of higher concentration, against a concentration gradient and in the presence of oxygen.During an active transport, a protein pump uses energy in the form of adenosine triphosphate (ATP) to move molecules from a region of lower concentration to a region of higher concentration, against a concentration gradient.
For example, a sodium-potassium ([tex]Na^+ K^+[/tex]) pump moves sodium ions ([tex]Na^+[/tex]) outside the cells and moves potassium ion ([tex]K^+[/tex]) inside the cells as an active transport.
In conclusion, using osmosis to carry sodium ions ([tex]Na^+[/tex]) into the cells is not a characteristic of the active transport pump used to move sodium ions across the membranes of gill cells in a freshwater fish.
Read more: https://brainly.com/question/18646362
Identify the organelles (plant cell answers)
A:Vacuole
B:Chloroplast
C:cell membrane
D:Golgi apparatus
E:endoplasmic reticulum
F:Cell wall
hey plz make your question clearly then text me or comment
Is it true that The living parts of an ecosystem are
the abiotic components.
Which of the following lines from "Birches" uses metaphor to create a strong image?
A." Shattering and avalanching on the snow-crust--Such heaps of broken glass to sweep away..."
B."I should prefer to have some boy bend them. As he went out and in to fetch the cows--"
C."Like girls on hands and knees that throw their hair"
D."Broken across it, and one eye is weeping from a twig's having laashed across it open."
Answer:
The correct answer Is A
Explanation:
"Shattering and avalanching on the snow crust
Such heaps of glass to sweep away..."
does bacteria have a vacuole?
How many essential amino acids are there
Answer:
Essential amino acids cannot be made by the body. As a result, they must come from food. The 9 essential amino acids are: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.
Explanation:hope it helps
Answer:
There are 9 Amino acids, Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, and Valine.
Explanation: