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AleksandrR [38]
3 years ago
6

Write a sentence comparing and contrasting deforestation and desertification

Biology
1 answer:
ohaa [14]3 years ago
6 0

Explanation:

compare

deforestation and desertification are both environmental hazards

contrast

deforestation as to do with cutting down of trees while desertification deals with turning fertile land into arid land

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In some chickens, the gene for feather color is controlled by codominance. The allele for black is B and the allele for white is
Agata [3.3K]

Answer:

The question is incomplete, it lacks the main questions, those questions are:

a. What is the genotype for black chickens?

b. What is the genotype for white chickens?

c. What is the genotype for erminette chickens?

Explanation:

This question involves a gene coding for feather colour in some birds, in which the black allele (B) and white allele (W) is involved. According to the question, the gene coding for feather colour exhibits co-dominance i.e. both the black (B) and white (W) allele are expressed in a heterozygous state (BW) to form an erminette phenotype.

Hence, if the neither alleles is dominant or recessive over the other. The black phenotype will only be expressed when the genotype is BB.

The white phenotype will only be expressed when the genotype is WW

The combination of both alleles which results in the simultaneous expression of both in the erminette phenotype, will be BW genotype.

8 0
3 years ago
Explain how mitotic recombination leads to the mosaic condition termed twin spots.
postnew [5]

Answer:

If an individual Drosophila has two or more populations of cells comprising different genotypes from one single egg then it is termed as twin spots or mosaic.

Explanation:

There might be different reasons for mosaic to occur like

Nondisjunctioning of the chromosomes

Lag in anaphase

Endoreplication

Mutations in a single cell

Mitotic recombination:

One of the major ways through which mosaic or twin spots arise is the mitotic recombination. It is also termed as somatic cross over. Twin spot or mosaic generally occurs if there is linking of heterozygous genes in repulsion. The recombination generally happens among the centromeres from the adjacent genes.

A common example of the mitotic recombination is the Bloom's syndrome. Bloom's syndrome is caused due to the mutation that occurs in the <em>blm</em> gene. As a result, there are defects in the BLM protein produced.

7 0
3 years ago
Which of the following distinguishes why “biosolid” is another name for fertilizers made from sewage sludge?
labwork [276]

Answer:

Sewage facilities remove liquid and then compact solid wastes.

Explanation:

Got it right on the quiz.

3 0
3 years ago
Which of the following would be considered a source of error in an experience
Irina18 [472]
I think A- laboratory mice are similar but not identical
3 0
3 years ago
In 1939, the use of DDT (a powerful synthetic chemical) as an insecticide was discovered. The United States adopted its widespre
olganol [36]
The answer is <span>insect and pest populations decreased.
</span>

DDT (dichlorodiphenyltrichloroethane) was used as an insecticide which is a substance used to kill insects. That resulted in decrease in insect and pest populations. It is a persistent and non-degradable insecticide, but as well organic pollutant readily accumulated to soils and consequently affects organisms.
7 0
3 years ago
Read 2 more answers
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