When blood supplies oxygen and food to a cell surface and these molecules diffuse across, we might expect some "resting time." However, if we inspected most cell membranes in a living human body, we would find a nearly continuous flow of substances back-and-forth across the plasma membrane. Which of the following is not a reason why? a) Cell metabolism is constantly using up oxygen and raw materials; this lowers their concentration so more will diffuse into the cell. b) Cell metabolism is constantly producing waste molecules; this increases their concentration so more will diffuse out of the cell. c) Cells produce useful secretions; this increases their concentration and more will diffuse out of the cell. d) Cell metabolism constantly produces carbon dioxide in respiration; this increases its concentration so more will diffuse out of the cell. e) Cells are living entities and in order to live can never "rest".

Answers

Answer 1

Answer:

Answer:

Option (e).

Explanation:

Blood is the main connective tissue of the body. Blood helps in the transport of oxygen, nutrients and the excretory product of the body. Blood also provides immunity as it contains white blood cells.

The resting time is expected during the diffusion process. But the substance continuous back and forth in the body. This is because cells are the main living entity of the organism. The cells are never at rest in order to live and their resting time is not possible.

Thus, the correct answer is option (e).

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The process in which the nucleus of a eukaryotic cell devides during asexual reproduction is called
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the --- of a star determines its temperature and luminosity. A. density. B. mass. C. location. D. width

Answers

Answer:

Option B, Mass

Explanation:

The general relation that gives the relationship between the lumonisity of a star and its mass is

$L \alphaM^(3)\n$

Thus, suppose if the mass of any star is two times the mass of sun then its luminosity will be 100 times the luminosity of sun.

The general relation between luminosity and temperature is

$L\alpha R^(2) T^(4) \n$

Since luminosity is depended on mass, and temperature is dependent on luminosity , thus it can be said that temperature is also dependent on mass of a star.

Thus, option B is correct.

b. mass
stars support their weight by making more energy which means more luminosity.

Which of the following incorrectly matches the term with its location?DNA is found in a chromosome.
Chromosomes are found in the nucleus of a cell.
Genes are located in a nucleotide.
Nitrogen bases are located in the central rungs of a DNA ladder.

Answers

The correct answer is:

Genes are located in a nucleotide. Rather, genes are segments of DNA which can be found within the nuclei of cells.

Explanation:

The large majority of organisms encode their genes in long strands of DNA (deoxyribonucleic acid). DNA consists of a chain made from four types of nucleotide subunits, each formed of a five-carbon sugar (2-deoxyribose), a phosphate group, and one of the four bases adenine, cytosine, guanine, and thymine..There are thereby 20,000 primary genes identified on one of the 23 chromosome pairs found in the nucleus or on long strands of DNA placed in the mitochondria.

Answer:

Genes are located in a nucleotide.

Explanation:

Equilibrium is best defined as a state of what?

Answers

Equilibrium is best defined as a state of physical balance. Where everything is balanced and the atoms are remained calm.

equilibrium is your brain so im thinking state of mind? i hope this helps

List three machines or devices that depend on gravity to work.

Answers

Gravity is a force which causes objects to fall or be still on the earth's surface. This invisible force has been longed explored mainly by many scientist however, Isaac Newton was first to conceptualize this into a proper principle.

GravityLight is a device that was recently developed by engineers that is designed to produce light through the force of gravity.

Explain how solid garbage in landfills can result in air pollution.

Answers

Answer:

By release of methane gas

Explanation:

Most of the waste in a land fill is biodegradable which releases methane gas in the air while degrading.

Methane gas is a green house gas which is able to entrap the heat radiated back by the earth. Entrapping of heat energy causes rising of global earth temperature thereby causing global warming.

Methane is much dangerous than carbon dioxide as it entraps twenty time more heat radiated by earth.

Hence , in this way solid garbage in landfills can result in air pollution.

Let's think about this one, we know gasses rise to the top of things so does burying it in the ground prevent this also think of other ways it can get into the air (EX: into streams and taken into air via water cycle)

how does the dna in the offspring produced by these methods compare to the dna in the original organism

Answers

If you are talking about sexual reproduction, the DNA is %50 the female parent and %50 the male parent. In asexual reproduction, the DNA is identical unless a mutation has occurred.

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