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PtichkaEL [24]
3 years ago
14

Halons and CFC's both

Biology
2 answers:
Alla [95]3 years ago
5 0

Answer:

The correct answer would be c. destroy ozone in the stratosphere.

CFC's (chlorofluorocarbons) and halon are the man-made chemicals which are the major contributors in the destruction or thinning of the ozone layer in the stratosphere.

These chemicals can get away into the upper atmosphere where ultraviolet rays or solar radiations break them to release bromine and chlorine atoms in the atmosphere.

These atoms react with the ozone molecules and break them apart to release oxygen.

The rate of this reaction is higher than that of natural replenishment of ozone.

This leads to the depletion or thinning of the ozone.

mestny [16]3 years ago
5 0

Answer:

letter C

Explanation:

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If we poke a plant and an animal cell ,which one of them would lose its shape?
OlgaM077 [116]

Answer:

animal cell

Explanation:

hope this will help you

3 0
3 years ago
Read 2 more answers
Naturalistic observation is commonly used for anthropology studies. true or false
EastWind [94]
Based on the given statement above, the correct answer would be TRUE. It is true that naturalistic observation is commonly used for anthropology studies. In naturalistic observation, this is when the r<span>esearcher makes observations in a particular natural setting (the field) over an extended period of time, using a variety of techniques to collect information. Hope this helps.</span>
6 0
3 years ago
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In a species of birds, having wide wings (W) is dominant to having thin wings (w). Which of the following genotypes is INCORRECT
Nadusha1986 [10]

Answer:

The options including the genotypes are not included. On a general note, three genotypes that are possible for this trait including their phenotype is:

WW- Wide wings

Ww- Wide wings

ww- thin wings

Explanation:

This question involves a single gene coding for wings width in a certain bird. The allele for wide wings (W) is dominant over the allele for thin wings (w). This means that allele 'W' will always mask the expression of allele 'w' in a heterozygous state.

There are three possible genotypes considering this trait.

WW- homozygous dominant genotype which wings will be phenotypically wide because it contains a combination of same dominant alleles.

Ww- heterozygous dominant genotype which wings will be phenotypically wide because I this combination of alleles, the W allele will always express itself phenotypically over allele 'w' considering the dominance of W.

ww- homozygous recessive genotype which wings will be phenotype thin because it contains a combination of same recessive alleles.

N.B: a recessive trait will only be expressed in a homozygous condition.

4 0
4 years ago
What is the term for the nucleotide sequences that are removed during mrna processing?
Ne4ueva [31]

The correct answer is: introns

Processing of mRNA is process that occurs only in eukaryotic cells. After the transcription, newly formed mRNA molecule is called and it must be processed into a messenger RNA (mRNA). Processing includes:

• Addition of a 5' cap to the beginning of the RNA

• Polyadenilation- addition of a poly-A tail (tail of A nucleotides) to the end of the RNA

• Splicing- removal of introns and linking the exons

After these steps mRNA is mature and used for the further steps (e.g. translation).

Sometimes some genes are alternatively spliced.

7 0
3 years ago
In the kidneys both useful and wasteful substances are removed from the blood by A. reabsorption. B. excretion. C. filtration. D
SVEN [57.7K]
 the answer is :
C)filtration
4 0
3 years ago
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