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Vladimir [108]
3 years ago
6

Which of the following has had the greatest effect on ozone depletion?

Biology
2 answers:
prohojiy [21]3 years ago
8 0
D).Chlorofluorocarbons (CFCs) is the correct answer for the statement above <span />
Rom4ik [11]3 years ago
7 0

Correct answer: D) Chlorofluorocarbons (CFCs)

Ozone depleting substance are those substance which causes depletion of the ozone layer.

These ozone depleting substances are used in refrigerators,  airconditioners,  refrigeratorsfire extinguishers, , as solvents for cleaning, in dry cleaning, electronic equipment and as agricultural fumigants.

The chemical which are most commonly known to cause depletion of ozone layer are :

Chlorofluorocarbons (CFCs)

Carbon tetrachloride (CCl4),

Methyl chloroform (CH3CCl3)

Hydrobromofluorocarbons (HBFCs)





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umka2103 [35]

Answer:

The correct answer is- 4:0

Explanation:

Marfan syndrome is a genetic problem which affects the connective tissue in the body. The trait for this disease is autosomal dominant which means even one abnormal copy of this gene in the offspring or individual is sufficient to cause this syndrome.

Let S is the allele that is dominant for this syndrome and s is recessive. So if a cross between homozygous dominant(SS) and heterozygous individual (Ss) occurs than all the offspring would have this syndrome.  

                                   S      s

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                              S  SS   Ss

Therefore all 4 offspring would have at least one dominant allele which is sufficient to cause this syndrome. So the phenotype ratio would be 4:0.

                       

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Which term describes cycles of hot and cold temperatures which expand and contract rock in combination with constant wind and wa
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The correct answer is option C, that is, physical weathering.  

The weathering resulting due to the influences of changing temperatures on a rock, making the rock to split apart is known as physical weathering. There are two main kinds of physical weathering, that is, exfoliation and freeze-thaw.  

Physical weathering takes place mainly in the locations, where few plants grow and little formation of soil occurs, like hot deserts and mountain regions. It takes place either via repeated freezing and melting of water or via contraction and expansion of the rocks surface layer, which is baked by the sun.  


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