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3 years ago

What is global warming and what can be done?

2 answers:

7 0

global warming is a increase in earths overall temperture caused increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants.

to prevent global warming we could:

Drive less, Recycle more, Use less hot water, Plant a tree, Turn off electronic devices when not being used such as a T.V

all of these ideas save pounds of carbon dixoide and if you look above it is listed as a cause of global warming

KonstantinChe [14]3 years ago

4 0

Global warming is a long-term rise in the average temperature of Earth’s climate sysytem. We can help by cleaning polluted areas and recycle more, also we can use less the plastic bags and more the ones that are made of cloth so when we use them we can reuse them after a wash unless like the plastic ones. There are a lot of comunities that are raising their voice for this problem and there are a lot of solutions for it , we need to stick togather because if we all stand up and start doing something for it maybe the global warming may fade even dissapear.

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A scientist breeds two different varieties

olga_2 [115]

Selective breeding
hope this helps

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3 years ago

if you control smear does not show gram-positive cocci and gram-negative rods, can you assume that the gram-stain reaction of yo

polet [3.4K]

No. At that point, you need to determine if the problem lies in the control or the staining reagents or techniques.

6 0

2 years ago

Boris Magasanik collected data on the proportion of each base in RNA from different species. To compare the relative amount of e

just olya [345]

Answer:

The nucleic acid is a macromolecule present in living systems in the form of either DNA or RNA, whose molecule consists of many nucleotides which are linked with each other to form long chains. The presence of DNA or RNA in an individual promotes continuity of life. The variability and complexity of nucleic acid are dependent on its constituent molecules as, sugar, a phosphate group, and a nitrogenous base. However, two monocyclic nitrogenous bases were classified purines (adenine:A, guanine:G) and pyrimidines (thymine:T, cytosine:C, and uracil:U).

In addition, RNA is a single-stranded structure which differs from DNA in two aspects, the sugar content of RNA is ribose, and pyrimidine base uracil replaces the thymine base of DNA. A ratio between two strands of DNA can be calculated by using Chargrff's rule which states that "DNA from any cell of all organisms possess a 1:1 ratio (base Pair Rule) of pyrimidine and purine bases'.

The purine to pyrimidine ratio in RNA with different bases is given below in the following table:

Presence of single strand in RNA does not follow chargaff's rule and alters the purine: pyrimidine ratio. The above ratio of each base in the given information is not equal, due to which the ratio of purines to pyrimidines is different. The ratio of DNA and RNA is not equal because DNA has its complementary DNA strand. However, bases in RNA might vary due to its single-strandedness property, but its ratio is dependent on the species.

Therefore, it can be concluded that the ratio of purines to pyrimidines is dependent on the species due to its genetic makeup. Hence, option (c) is correct.

7 0

2 years ago

The diagram below compares the amounts of common elements found in the

Lelechka [254]

Answer:

C. Oxygen & Hydrogen.

Explanation:

The body is made of 65% Oxygen, 18% Carbon, 10% Hydrogen, 3% Nitrogen, and 4% other elements.

3 0

2 years ago

A novel multicellular organism has been discovered whose natural habitat is a barren desert with limited water and nutrients. Th

STatiana [176]

Answer:

The correct answer will be- sexual reproduction

Explanation:

An organism can reproduce by either of two ways of reproduction called asexual reproduction and sexual reproduction.

Both modes of reproduction prove beneficial to the organism but based on the environmental condition, the organism use either sexual mode or asexual mode or both.

In the given condition, since the organism has to adapt and evolve in response to the desert conditions which requires changes in the DNA sequences which can take place only during the mechanism of sexual reproduction like crossing over or genetic recombination, therefore, sexual reproduction is the correct answer.

6 0

2 years ago

What is global warming and what can be done?​

What is global warming and what can be done?