1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
DochEvi [55]
4 years ago
8

Which statement describes the ability of the cell membrane to allow various substances to move through it?

Biology
2 answers:
sineoko [7]4 years ago
7 0

Answer:   the cell membrane is selectively permeable

Explanation:

Alika [10]4 years ago
7 0
A) it is selectively permeable
You might be interested in
Need an answer, please need an answer, please.<br>no copy on góogle​
DENIUS [597]

Answer:

hii there

i have worked on this but i have two answers so choosing is on you

Explanation:

Essay 1 )

In many people's opinions mans impact on the environment is a big issue in our life which is easily neglected, as humans are responsible for a staggering amount of damage on the earth. Nature manages its own components.

Since the outbreak of technology and industrialisation humans have greatly had a negative impact on the environment, such as; air pollution, habitat destruction, water pollution, the burning of rainforests and land pollution. In this essay I intend to give facts and discuss the effects and causes on these topics and discuss the solutions being carried out to improve the conditions.

Air pollution effects people in areas of emission sources, such as, power plants, local industry and major roads. Humans contribute to pollution by the use of machinery in industry causing pollution to the environment. More effects of air pollution on the environment involve using diesel fuel for vehicles and coal for power along with the lack of emission controls for vehicles and industry.

Another cause of air pollution is the greenhouse gas CO2, this gas warms the earth through living things as they emit CO2 when breathing which contributes to humans also, as we add to this statistic through breathing also. CO2 is usually thought to be involved with cars, aeroplanes and power plants, in the past 150 years , CO2 has been polluting our atmosphere through the sources mentioned, this is the highest CO2 emissions recorded for a long time. More causes of air pollution is methane gas which comes from swamps which are contributed to man through flooding. Cfc's are another major cause of air pollution by man through the use of fridges and deodorants (aerosols) which harms the earth's ozone layer.

Essay 2 )

In order to meet the basic needs of increases population, the present society has under taken a series of steps like rapid industrialization, unplanned urbanisation, deforestation, overexploitation of natural sources, etc.The outcomes of the above human activities have contributed significantly to the degradation of environment around us.

Some important impacts of human activities on environment are outlined below:

1. Deforestation:

In order to provide timber and farm land to increased population, large number of forest trees are cut and forest area is converting to farm lands. The rate of deforestation is so faster that around 1.5 million hectare of forest cover is lost every year is India alone. The process of deforestation results in decreasing rainfall, increasing global temperature, loss of top soil, modification of climatic conditions etc.

2. Industrialization:

Although the industrial activities of man provide basic need of the society, simultaneously the same release a lot of pollutants to the environment. The pollutants in environment cause loss of raw materials, health hazards, increase in death rate, damage to crop, making environment unfit for living organisms etc.

3. Loss of ecological balance:

The excessive use, misuse and mis-management of biosphere resources results in disturbance in ecosystem or ecological imbalance.

4. Air pollution:

The anthropogenic release of various air pollutants to the environment causes a number of dreaded phenomena like green house effect, ozone layer depletion, acid rain and smog formation etc.

5. Water pollution:

Human activities in respect of disposal of sewage wastes, solid wastes, municipal wastes, agricultural and industrial wastes cause the environment unfit for day to day use. Besides, polluted water spreads or leads to different diseases.

6. Increased consumption of natural resources:

Since the starting of industrial era, the natural resources are constantly utilised for the production of one or more products for the day to day use of society.

7. Production of waste:

Rapid industrialization and unplanned urbanization release a lot of toxic waste material either in solid or liquid or gaseous state which induces a number of serious environmental hazards.

8. Extinction of Wildlife:

Since forests are natural habitats of wild life (both plants and animals) deforestation leads to the extinction of valuable wild life and loss of biodiversity.

9. Habitual destruction:

The commercial and industrial activities associated with mining, construction of dams, fishing, agriculture etc. cause habitat destruction which is a pathway to pollution.

10. Noise pollution:

The man-made noise due to mechanized automobile, industries, trains, aero planes, social functions etc. causes noise pollution which has impact on both biotic and a biotic components of environment.

These are the human impacts on environment

hope it helps

have a nice day : )

8 0
3 years ago
Read 2 more answers
Explain the seasons in the
chubhunter [2.5K]

Answer:

Seasons are caused by the Earth's auxiliary tilt. As the Earth revolves around the sun the tilt causes the Northern ans Southern hemispheres to trade places.

Explanation:

8 0
3 years ago
What is carbohydrates and the importances of carbohydrates in the lives of human being?​
brilliants [131]

Explanation:

Hey there! Carbohydrates are one of four macromolecules. Carbohydrates provide short-term energy. Glucose, sucrose, starch, cellulose, chitin all belong to Carbohydrates. Carbohydrates are often referred to as saccharides and form ring structures. All Carbohydrates names end with "ose".

Carbohydrates Elements: Carbon, Hydrogen, and Oxygen - ratio 1:2:1 CHO

Carbohydrates Monomers: Monosaccharides (one sugar)

Carbohydrates Polymers: Polysaccharides and Disaccharides

Carbohydrates Functions: Store energy; provide structural support

Carbohydrates Examples: Bread, pasta, grains

~I hope I helped you :)~

5 0
3 years ago
Read 2 more answers
17. _______ power is generated by converting the kinetic energy of falling water to electricity. A. Hydrophobic B. Hydroelectric
lawyer [7]
The answer is A..............100% sure
3 0
3 years ago
Read 2 more answers
What’s the answer to this??
Natalija [7]

Answer:

3

Explanation:

5 0
3 years ago
Other questions:
  • Why don't the spontaneous deleterious mutations that occur in an individual
    8·1 answer
  • What type of cell transport uses carrier proteins? A. Passive diffusion B. Osmosis C. Active transport D. Facilitated diffusion
    9·2 answers
  • Forensics- List the variables that can have a significant impact on the accuracy of a
    11·1 answer
  • Affinity chromatography can be used to purify proteins such as growth factor receptors. The ligand of the growth factor receptor
    11·1 answer
  • A pregnant 16 year old has a fractured leg after being hit by a car. You explain to her that her leg needs splinting and she agr
    7·1 answer
  • What are characteristics of an organism called?
    10·1 answer
  • When an action potential reaches the end of the axon, what happens next?
    5·2 answers
  • A change in DNA could alter the amino acid order which will affect the folding of the protein, and therefore it's function. True
    13·2 answers
  • Describe nodes of ranvier and their role in transmitting impulses
    10·1 answer
  • Please help me with this question!
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!