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Artist 52 [7]
2 years ago
14

How have the historic levels of melanin in human populations changed due to migration? (1 point)

Biology
1 answer:
MaRussiya [10]2 years ago
4 0

Answer:

i would say A

Explanation:

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Consider a breeder that mates two heterozygous black Staffordshire bull terriers over the course of three years. The dam eventua
Lilit [14]

Answer:

Different colour occur due to heterozygous nature.

Explanation:

Most of the puppies just like parents because the black colour gene or allele is dominant over other colour allele whereas other colour puppies also formed due to presence of heterozygous type of alleles. Other colour occurs due to appearance of recessive allele in the physique of the offspring or formation of hybrids occurs which causes colour other than black and white in the offspring. In the F1 generation all the offspring resembles to the male parent but after this generation some offspring resembles to male, some are hybrids and other resembles to female.

6 0
2 years ago
The new Hazard Communication Standards provide teachers and students the right to __________ chemical hazards.
Aleonysh [2.5K]

The new Hazard Communication Standards provide teachers and students the right to manipulate chemical hazards.

Chemical hazards are non-biological substances that can cause damage to health. These are used in different enterprises, companies, school, universities and laboratories for different purposes such as cleaning, disinfection, scientific experiments, among others. When handling them, <u>employees are exposed to them and are vulnerable to harm from these chemicals</u>.  

There are many types of hazardous chemicals to be wary of, such as:

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In the workplace, exposure to these substances represents a real occupational hazard and there must be regulations to ensure that they are safe to handle.

The Occupational Safety and Health Administration (OSHA) is the agency of the U.S. Department of Labor which determined the Hazard Communication Standards. <u>This is a document with the necessary information to study the hazards of the chemical substances used by different employees in the companies</u>, so that they are aware of the dangers of these substances. These employees have the right to know exactly what compounds they handle and the risks involved in their use as well as the precautions and care to be taken.

Therefore, by having these safety standards in place in schools and universities, teachers and students have the possibility and the right to handle chemical hazards safely to be able to conduct the class normally and learn what is necessary.

Learn more about chemical hazards here: brainly.com/question/13113515

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2 years ago
During the 1900s, the following genetic discoveries were made:
Paha777 [63]

Answer:

There are four bases in DNA, and they combine in a specific way. Adenine pairs with thymine, and guanine pairs with cytosine.

Explanation:

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2 years ago
What is the name of the Island chain that Darwin explored off the coast of South America?
aksik [14]

the Galapagos

While visiting the Galapagos in 1835, British naturalist Charles Darwin observed local plants and animals.

7 0
2 years ago
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All BUT one of the phrases describe a function of the human skeletal system. That is A) allows for movement. B) protects interna
ZanzabumX [31]
D is the right answer

But then again it is actually wrong... Either way D is the answer
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3 years ago
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