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3 years ago

If a molecule is to large or polar and cannot easily diffuse into the cell, it is

Biology

1 answer:

Eddi Din [679]3 years ago

7 0

Answer:

hydrophilic

Explanation:

Large polar or ionic molecules, which are hydrophilic, cannot easily cross the phospholipid bilayer. Charged atoms or molecules of any size cannot cross the cell membrane via simple diffusion as the charges are repelled by the hydrophobic tails in the interior of the phospholipid bilayer.

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Low levels of _____ in the brain have been linked to alzheimer's disease.

Bess [88]

Acetylcholine.......

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3 years ago

Which one of these scenarios is most like social conditioned place preference?

cricket20 [7]

The fulfillment that Charles finds in bodybuilding leads him to become an orthopedic surgeon.

The initially neutral environmental signals become linked to the unconditioned stimulus's motivating qualities, which might cause behavior to either approach or avoid the environment. To increase the ability to make causal claims, control and treatment group are frequently used in practice.

Similar to Pavlovian conditioning, environmental signals are frequently combined with an unconditioned stimulus that naturally elicits a response before conditioning (the unconditioned response). The neutral stimulus will eventually start to evoke reactions that resemble the unconditioned response with repetition and pairings. The unconditioned stimulus in conditioned location preference could be anything, such as food pellets, water, sweet liquid, novel toys, social engagement, drug intoxication, drug withdrawal, foot shock, illness, wheel running, copulation, or any number of other things.

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1 year ago

How are scientific processes important in solving problems? Give an example and EXPLAIN how these processes make solving this ex

xeze [42]

Scientific process

A step by step procedure of solving a problem is known as scientific process.

Explanation

To solve a problem following steps should be followed: Identification of problem through observation, Development of hypothesis, Experimentation to test hypothesis, Analyze the result of experiment, Conclusion to choose the best possible solution.

Example

1. Identification of problem through observation

Development of agriculture industry lead to soil pollution in the form of heavy metals which cause serious pose to human health. Data collected from environmental department show that heavy is adding day by day in the form of sewage drained from industries in to water, which has also affected aquatic life.

2. Development of hypothesis

Many strategies have been developed for cleaning or removal of heavy metals from soil such as cultivation of heavy metal tolerant plants, installation of plants which filter sewage water before entering into water table, use of bacteria that clean soil from heavy metals.

3. Experimentation to test hypothesis

To test hypothesis and experiment will be set up based on above mentioned method. However main focus should be given on cost, time and environmental friendly approach. To grow heavy metal accumulator plants will cost less but time consuming and after harvesting if their biomass is disposed off, it will again add heavy metals to soil. It is cost effective but time wasting process. Installation of plant to filter sewage is better method but it is cost effective and filter should be changed after a month which cost too much. The use of heavy metal tolerant bacteria is not too costly and once when they enter to soil having heavy metals will absorb heavy metals and will convert them into less toxic form. These bacteria will also reproduce and produce more offspring which will help in cleaning of soil

4. Analyzing result

It was observed in the results that use of plant of clean heavy metal is time wasting process. Similarly, installation of plant is also cost effective, however the use of bacteria for remediation of heavy metal is less costly and not harmful for environment.

5. Conclusion

It was concluded from results that bacteria should be applied for bio remediation purposes.

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4 years ago

What must happen before acetyl CoA can be formed during respiration?

Ksivusya [100]

Answer:

The correct answer is glycolysis.

Explanation:

Glycolysis must happen before acetyl CoA can be formed during respiration.During glycolysis the precursor molecule glucose is converted to pyruvate by a series of enzyme catalyzed biochemical reactions.

Pyruvate in aerobic condition is then converted into acetyl CoA by the help of pyruvate dehydrogenase enzyme

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4 years ago

Write a description of the feeding relationship on the lines below .include descriptions of which organisms are producers , omni

Nimfa-mama [501]

Answer:

Plants are called Producers because they can produce food energy. Animals are called Consumers because they can only consume food energy. Animals that eat plants are called Herbivores or Primary Consumers. Animals that eat other animals are called Carnivores.

Explanation:

8 0

3 years ago