<span>One of the reasons PCB's have been hard to clean up from the puget sound is because they stay in the food chain. Once something is inside an animal it becomes much harder to remove from the environment than if it was just in water.</span>
Answer:
1)Diffusion
2)yes, because of size difference
Explanation:
1) Biological cells live and grow by the inside and outside movement of molecules and diffusion is a process which takes place when molecules move from higher concentration area to lower concentration area. When cubes of agar alongwith indicator (phenophthalein) is added into vinegar, the hydrogen ions move from vinegar into the agar cubes and change in color appears. This change of color indicates the diffusion of vinegar into agar cubes
2) The diffusion distance differs between the cubes because of different sizes of the cubes. The difference in size results in difference of surface area which can be calculated by the volume of the cube. Larger the cube is, the more time vinegar will take to diffuse into the agar cube.
The possible sources of early organic molecules would be inorganic molecules forming into more complex organic ones using energy from lightning.
<h3>Formation of first organic molecules</h3>
The first organic molecules are hypothesized to have been formed from simple inorganic molecules such as water vapor, methane, and ammonia.
Their dissolution to form the 'chemical soup' is said to have led to their formation with reactions within the chemical soup driven largely by lightning and UV rays.
More on the first organic molecules can be found here: brainly.com/question/27752124
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Answer:
hope you like mark beainliest
Explanation:
In December of 2020, the Government of Canada introduced A Healthy Environment and a Healthy Economy – Canada's strengthened climate plan. The plan builds on the efforts that are currently underway through the PCF to cut more pollution, to create more good jobs, and to support a healthier economy and environment.
Canada is now a world leader in the fight against climate change. We are taking action to reduce emissions, spark innovation and create jobs.
I believe the answer is D