1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Andrej [43]
3 years ago
13

Tại sao tóc có mầu đen

Biology
1 answer:
Akimi4 [234]3 years ago
6 0

Answer:

Melanin is responsible for black colour of hair.

Explanation:

Hair is black in colour because it is determined by the amount of a pigment present in hair is called melanin. If eumelanin which is a type of melanin, present in hair, it gives people black or brown hair. If the receptor is not activated or is blocked in the hair, then melanocytes make pheomelanin instead of eumelanin and then the black or brown hair colour did not occurs so we can conclude that melanin is responsible for black colour of hair.

You might be interested in
Hi pls help i need to answer question based on the video Bill Nye science guy magnetism.
Zolol [24]
It’s all in socratic because i did that already and it was really easy
8 0
3 years ago
What major geographic event took place during the Mesozoic Era?
ad-work [718]

Answer;

The geographic events during mesozoic Era;

-formation of the Rocky Mountains begins

-Innuitian Mountains formed

-shallow seas in the interior of North America at times

Explanation;

-This Era is the second of Earth’s three major geologic eras of Phanerozoic time.

-Mesozoic Era began 252.2 million years ago, following the conclusion of the Paleozoic Era, and ended 66 million years ago, at the dawn of the Cenozoic Era.

3 0
4 years ago
Read 2 more answers
The stages of meiosis are classified into two phases. explain why there is in need of two phases
choli [55]
The two phases meiosis is divided into is Meiosis I and Meiosis II. Because Meiosis is not asexual reproduction is uses sexual reproduction by combining the chromosomes of the mother and father. Since each parent give 23 chromosomes to make the whole 46 a human needs, when the chromosomes come together they create tetrads. these are pairs of replicated chromosomes. There are 2 phases because the first phase separates the tetrads leaving the two sister chromatids. During Meiosis II, the sister chromatids are separated like in Mitosis. Overall, the reason that there are two phases is because the maternal and paternal gametes give replicated chromosomes to the zygote.
4 0
4 years ago
Which activity would best keep the world's oxygen supply from decreasing?
NeTakaya
The statement that would best keep the world's oxygen supply from decreasing: 
a.Planting trees in forests that have been harmed 
Trees decrease the urban heat island effect via evaporation cooling and lessening the amount of sunlight that reaches parking lots and buildings. 
5 0
4 years ago
Read 2 more answers
Through which vascular tissue does water and nutrients get transported to reach the leaves during transpiration?
Licemer1 [7]

Answer:

Explanation:

Transpiration is the loss of water from a plant in the form of water vapor. Water is absorbed by roots from the soil and transported as a liquid to the leaves via xylem. In the leaves, small pores allow water to escape as a vapor.

Hope this helps!!

8 0
3 years ago
Other questions:
  • How is the Male reproductive system different from other body system
    10·2 answers
  • A population of bacteria is treated with an antibiotic. It is estimated that 5,000 live bacteria existed in the sample before tr
    14·2 answers
  • The hydrilla plant was introduced to freshwater habitats, like ponds and streams, in Georgia. Scientists found out that it crowd
    14·2 answers
  • Help Me To Check With This
    12·1 answer
  • When one allele is dominant to another, what is the most common biological mechanism for this dominance?
    9·1 answer
  • Which of the following is an example of uniform dispersal?
    15·2 answers
  • Pretend you are a biologist analyzing mutations occurring in the DNA of an endangered species. In three to five sentences, descr
    14·1 answer
  • Helppppppppppppppppppp
    6·1 answer
  • Why does the Earth orbit the sun? Why doesn't it just fly out into space?
    13·1 answer
  • If a sexually reproducing organism has a diploid number of 36, how many individual chromosomes would any of its gametes have?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!