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
hram777 [196]
2 years ago
15

The theory of evolution by Charles Darwin was sparked by his travels in South America especially but also was supported by his o

bservations of plants and animals in England when he was writing his book. On aspect of evolution is the natural variety of types within a species, some of which are more adapted to the environment than others.
Biology
1 answer:
Alina [70]2 years ago
7 0

Answer:

Evolution refers to the change in the structure of an organism with the passage of million of years.

Explanation:

Evolution is the change in the structure of an organism with the passage of million of years. Evolution occurs due to two reasons, first from genetically while the other from adaptation to the environmental conditions. In genetically, the change in structure of animal comes from their parents whereas changes occurs due to adaptation of an organism in order to survive in the harsh climatic condition of the environment.

You might be interested in
A normal man and normal woman marry. What is the chance that they will produce a male child with Down's syndrome?
nikitadnepr [17]

Answer:

The chance of a normal couple having a child with down syndrome is 1 to 600 births.

Explanation:

Down syndrome is a genetic flaw that occurs when the fetus is being formed.

A human cell considered normal has 46 chromosomes, divided into 23 pairs. For some unknown reason, an error may occur at the beginning of embryonic development and an extra chromosome is created, which binds to par 21. The result is cells with 47 chromosomes. This causes the said syndrome.

It is important to know that this failure happens at random. It is nobody's responsibility. It has not been proven to date that lifestyle, actions during pregnancy, smoking, drinking, medicines, environmental factors or kinship between the couple can influence this occurrence. She is not contagious either. The likelihood of a normal couple having a child with the syndrome is approximately 1 to 600 births.

8 0
3 years ago
Can someone help me please.
Ahat [919]
Do u still need help I know how to do that
7 0
3 years ago
Que sucedería con la especie humana si debido a una futura mutación genética sus células no pudieran realizar los procesos de mi
MaRussiya [10]

Answer:

la vida no podría continuar sin los procesos de división celular  

Explanation:

La mitosis es el proceso de división celular mediante el cual se producen dos células idénticas a partir de una sola célula. Durante la mitosis la célula crece y duplica la cantidad de ADN, con lo cual exactamente el mismo contenido de información genética es trasmitido a las sucesivas células que el proceso de mitosis va a dar origen. Por otra parte, la meiosis es un proceso celular en el cual se producen dos divisiones nucleares y citoplasmáticas (meiosis I y meiosis II) las cuales son precedidas por una fase de replicación del ADN. En la especie humana, la mitosis da lugar a células diploides (2n) con dos set completos de cromosomas homólogos, mientras que la meiosis da lugar a cuatro células haploides (n) llamadas gametos (el gameto masculino es el espermatozoide y el gameto femenino es el óvulo) las cuales contienen la mitad del número cromosómico al de la célula de origen. En organismos eucariotas pluricelulares tales como la especie humana, la función de la mitosis es producir más células somáticas (soma: cuerpo) con idéntico material genético, mientras que la función de la meiosis es producir células aptas para el proceso de reproducción, es decir, células con la mitad del material genético que se fusionarán para generar una célula diploide o zigoto a partir del cual y mediante sucesivas mitosis se desarrollará un organismo adulto.

5 0
2 years ago
Which viruses can affect DNA?
tester [92]

Answer:

Study shows that viruses can target DNA methyltransferases (DNMTs) to suppress gene expression via DNA methylation. Viruses can cause many different health problems in humans including HIV/AIDS, hepatitis, herpes, and even cancer

Explanation:

6 0
2 years ago
Hemophilia is a hereditary bleeding disorder that primarily affects males. Why does this condition typically affect males more t
Ymorist [56]

Answer:

See the answer below

Explanation:

<em>Hemophilia typically affects more males than females because the disorder is </em><em>X-linked </em><em>and </em><em>recessive</em><em>. </em>

<u>Females have two X chromosomes (XX) while males only have one X and one Y chromosome (XY). The two X chromosomes in females are capable of carrying alleles while the Y chromosome in males is hypothesized not able to carry alleles. </u>

Consequently, the two X chromosomes in females will both need to carry the recessive allele of hemophilia in order for any female to be affected for hemophilia while the males only need their single X chromosome to carry the recessive allele in order to be affected.

In order words, the presence of a single recessive allele is not enough for a female to be affected while it is more than enough for a male to be affected. Hence, more males are affected b hemophilia disorder than females.

6 0
3 years ago
Read 2 more answers
Other questions:
  • Which methods are the most common for dealing with waste
    14·2 answers
  • Which processes of the water cycle move water from the atmosphere into surface water reservoirs?
    14·1 answer
  • In terms of length, how does a typical bacterial cell compare to a typical eukaryotic cell?
    10·1 answer
  • In green leaves, light-absorbing compounds called pigments are made of A) adenine. B) carbohydrates. C) lipids. D) proteins.
    6·2 answers
  • BRAINLIEST!!PLEASE HELP ME!!
    6·1 answer
  • Barbara has curly hair. Her genotype for this trait is CC. What do you infer from this?
    10·2 answers
  • Which is the proper order for blood traveling through the systemic circuit? venae cavae Right arrow. arteries Right arrow. venul
    11·2 answers
  • Are species in the same family more or less closely related than species in the same class?
    8·1 answer
  • What are two types of evidence showing evolution occured
    12·1 answer
  • Please describe the blood flow through the heart. Please name all the structures.​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!