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Oxana [17]
3 years ago
8

Mrs. Rosales performed a demonstration of a chemical reaction for her science students. In a well-ventilated room, she added a s

ulfuric acid solution to a beaker containing granulated sugar. The mixture immediately became very hot and released water vapor into the air. The sugar appeared to burn and was transformed into a rapidly growing column of solid black material. The experiment also produced a foul-smelling odor. Which observation about the demonstration does not provide evidence of a chemical reaction? A. The mixture immediately became very hot B.Water vapor was released into the air. C.The mixture released a foul-smelling odor. D.The sugar was transformed into a solid black material​
Biology
1 answer:
Andrej [43]3 years ago
6 0

Answer:

D

Explanation:

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Mattie found a tool that her dad left in the yard. A picture of the tool is shown below.
oksano4ka [1.4K]

Answer:

b

Explanation:

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How could you determine the identity of a bacterium?
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Answer:

THE RELATIONSHIP OF IDENTIFICATION TO BACTERIAL CLASSIFICATION AND NOMENCLATURE. In order to identify an unknown bacterial isolate, the characteristics of the isolate must be compared to known taxa. In microbiology, the basic taxonomic unit is the species, and groups of related species are placed in the same genus.

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3 years ago
I WILL GIVE BRAINLIEST!!!
Nesterboy [21]

Answer:

25%

Explanation:

When looking at a pedigree remember that:

  • squares are males
  • circles are females
  • the solid colored figure represents an individual affected by a disease
  • the empty figure represents a healthy individual

Let us assign the symbol X⁺ to represent the dominant allele linked to the X-chromosome and expressing healthiness, and X⁻ to represent the recessive allele expressing the dissease.

According to this pedigree

  • I1 is a man affected by the disease, YX⁻
  • I2 is a healthy woman X⁺X⁻
  • we can see that among the progeny (generation II) there are two individuals affected (a boy and a girl) and one healthy girl. This means that the mother I2 is heterozygous for the trait.

So, having their genotypes we can know what are the probabilities of getting a son with DMD

Parentals)    YX⁻     x     X⁺X⁻  

Gametes)   Y     X⁻      X⁺     X⁻

Punnett square)

                        X⁺             X⁻

            X⁻      X⁺X⁻         X⁻X⁻    

            Y        X⁺Y           X⁻Y

F1)

  • The probabilities of getting a healthy daughter X⁺X⁻ are 25%
  • The probabilities of getting a healthy son X⁺Y are 25%
  • The probabilities of getting a daughter with DMD X⁻X⁻ are 25%
  • The probabilities of getting a son with DMD X⁻Y are 25%
7 0
3 years ago
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In Asia, human population growth and land development have fragmented forest habitats. Because of this fragmentation, tigers hav
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Answer:

Isolation of the tigers´ populations will cause an increase in inbreeding events, meaning a significant reduction in genetic diversity in each population. The loss of genetic variability will cause a reduction in the fitness of individuals. The population's survival will be threatened, with high chances of getting extinct.

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.  

Download pdf
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