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sveta [45]
3 years ago
8

The assisted transport of a molecule across the cell membrane without an expenditure of energy is known as what?a. Diffusion b.

Facilitated transport c. Active transport d. Osmosis e. Crenation
Biology
1 answer:
Fittoniya [83]3 years ago
3 0

Answer:b. Facilitated transport

Explanation:in the usual activities of the cell,it's cell membrane is responsible for the movement of substance in and out of the cell.

Such substances include nutrients,water, oxygen etc.

The plasma membrane select the substances that it allows into the cell thus it is said to be selectively permeable.

The plasma membrane of the cell has a phospholipid bilayer made up of cholesterol, proteins and glycoproteins.

The proteins on the membrane are useful for facilitated diffusion.

In this diffusion process,the proteins helps to carry large molecules across the cell membrane.such molecules includes glucose,amino acids etc.

In the process energy is not expended so it is a type of passive transport.

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Explain the global water crisis in your own words​
makvit [3.9K]

Explanation:

Water is the basic necessity of every human being. But, water scarcity is a major issue that is rising very rapidly in modern-day India. The problem has become so severe that in many states the groundwater has almost dried up and people have to depend on water supply from other sources. In addition, water is one of the most misused commodities that we still waste. It is the central point of our lives but not the central point of our focus.

In the past, people understand the value of water and plan their lives around it. Moreover, many civilizations bloom and lost on account of water. But, today we have knowledge but we still fail to understand the value of water.

Reason for Water Scarcity in India

Water scarcity is the cause of mismanagement and excess population growth of the water resources. Also, it is a man-made issue that continues to rise. Besides, some of the reasons for water scarcity are:

Wasteful use of water for Agriculture- India is one of the major food growers in the world. That produces tons of quantity of food to feed its population and export the surplus that is left.

In addition, producing this much food requires a lot of water too. The traditional method of irrigation wastes a lot of water due to evaporation, water conveyance, drainage, percolation, and the overuse of groundwater. Besides, most of the areas in India use traditional irrigation techniques that stress the availability of water.

But, the solution to this problem lies in the extensive irrigation techniques such as micro-irrigation in which we provide water to plants and crops using a sprinkler or drip irrigation.

Reduction in water recharge systems- Due to rapid construction that uses concrete and marbles do not let the rainwater to get absorbed in the soil. But, if we install some mechanism in our houses that can hold the rainwater then we can recharge the groundwater.

Lack of water management and distribution- There is a need for an efficient system that can manage and distribute the water in urban areas. Also, the government needs to enhance its technology and investment in water treatment. Besides, we should ensure optimization at the planning level.

Solutions to Overcome this Problem

Water-free urinal- Urinal waste around 6 liters of water per flush that add up to 25 thousand liters per year. If a male member of the house stops using the flush then they can save lots of water.

Close the running tap- During dishwashing and hand washing people often let the tap running. These running taps waste thousands of liters of water per year. Besides, closing the tap will reduce this problem.

Replace dripping taps- In India it is commonly seen that most of the houses have one or two taps that drop water even when they are close. This running tap wastes up to 30,000 liters of water that nobody bothers to change. So, we should replace these taps immediately.

To conclude, water scarcity has become a more dangerous problem day by day. Also, due to our leniency that we haven’t taken the problem water scarcity seriously. But, now the authorities and people are working to resolve this problem so that our future generations do not have to buy this necessity.

8 0
2 years ago
Which reaction best explains why carbon is able to from macromolecules ?
guajiro [1.7K]

Answer:

Carbon can bond with many elements

Explanation:

Carbon can bond with many elements, including itself, to form macromolecules. Moreover, it can form four bonds, and that makes possible many different arrangements of the atoms in the molecules.

A is <em>wron</em>g. Carbon is among the seven smallest elements in the Periodic Table.

C is <em>wrong</em>. Carbon is found in living things because it can form macromolecules, not the other way around.

D is <em>wrong</em>. Carbon can bond with many other elements beside itself.

4 0
3 years ago
The increase in volume of the muscle fibers due to the enlargement of its components is referred to as
Lelu [443]

Answer:

The increase in volume of the muscle fibers due to the enlargement of its components is referred to as hypertrophy.

Explanation:

Hypertrophy is about increasing the size of the transverse diameter of muscle fibers, it causes the muscle to grow in volume, due to the stimulation of the growth of muscle cells without cell division in the muscle. Hypertrophy occurs as a result of resistance training.

8 0
3 years ago
Most fertilizers contain ammonia. Ammonia (NH3) forms when hydrogen reacts with nitrogen. Which balanced equation represents amm
Nezavi [6.7K]

the answer is gonna be b

5 0
3 years ago
What form do we use to write hypotheses?
ra1l [238]
The answer would be D because it leaves you thinking about what will happen next. Hope this helped you out .
6 0
3 years ago
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