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noname [10]
3 years ago
7

Selective permeability select what enters and exist the cell

Biology
1 answer:
Anarel [89]3 years ago
8 0
Selectively permeable means that cells only allow certain molecules to enter or exit a cell. 
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In science class, Maria observes a white-colored cut flower. She sees that the petals turn red when the flower is sitting in a v
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To confirm the above hypothesis, Maria should perform an experiment to prove that xylem is responsible for the transport of coloured water through the plant. This is called the ascent of sap.

A suitable plant having a tender, semitransparent stem should be selected. The root system of the plant should be cut off and the twig has to be placed half-immersed in a coloured solution of water for about one hour. Later, when the plant is observed, parallely running streaks of coloured water can be seen through the semitransparent stem and other parts of the plant indicating that the xylem is involved in the upward movement of water.

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3 years ago
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This is for Fossil Fuels.
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<h2>Question no 4 answer</h2>

Fossil fuels will still provide 60% of energy in 2040, compared to 85% today, but the pattern of use will change, away from coal and towards gas, and increasingly concentrated in industry. Fossil fuel prices would be lower in a 2˚C scenario, with less need to mobilise high-cost reserves to meet demands.

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Carbon emissions trap heat in the atmosphere and lead to climate change. In the United States, the burning of fossil fuels, particularly for the power and transportation sectors, accounts for about three-quarters of our carbon emissions

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The premise of this Viewpoint article is that the sustainability of the electricity supply is very often addressed in narrow frames of reference, which sets up incremental decision-making. To more fairly compare the economic, social, and environmental aspects of renewables, such as photovoltaics, to fossil fuels, a broader view is required which needs to take into account the impacts of the fossil fuel supply chain.

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These non-renewable fuels, which include coal, oil, and natural gas, supply about 80 percent of the world's energy. They provide electricity, heat, and transportation, while also feeding the processes that make a huge range of products, from steel to plastics.

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7 0
2 years ago
What is the explanation to this question?<br> Thank you!
kykrilka [37]

Answer:

the fish couldn't eat

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some of the fish and plants feed off of plants out of water. by removing them, they lost their nutrients.

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3 years ago
You may have heard through various media of an animal alleged to be the hybrid of a rabbit and a cat. Given that the cat (Felis
Katyanochek1 [597]

Answer:

The correct answer is - 2n = 41 chromosomes.

Explanation:

It is given that the cat has a diploid chromosome number of 38 while the rabbit has a diploid number of 44 chromosomes and if they form a hybrid then their expected chromosome number in somatic cells would be -

Cat (2n=38) produces haploid gametes with 19 chromosomes (n-19).

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19+22= 41 chromosomes in the particular hybrid as half number of chromosomes come from each parent.

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