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
miv72 [106K]
3 years ago
11

Scientists study the evolutionary relationships of species to better understand the history of life on Earth. Describe two metho

ds that scientists can use to determine whether two species (modern or extinct) are closely related.
Biology
1 answer:
Alika [10]3 years ago
3 0
Scientists use several methods to determine the proximity between species. Two of those methods may be an anatomical comparison, by examining the skeleton structure of two species, and DNA composition comparison, by comparison of genes, or specific parts of the DNA, that allow establishing the relative distance between species.
You might be interested in
Humans autosomal cells have two copies each of 23 unique chromosomes. Match each of the following cell division events and cell
zvonat [6]

Answer:

Please see below    

Explanation:

The number of chromatids have been stated with the respective event when it occurs in that particular number in the following way:  

<u>23 chromatids</u>

primary oocyte arrested prior to ovulation  

spermatozoa    

<u />

<u>46 chromatids</u>

oogonium prior to S phase  

<u>92 chromatids</u>

secondary polar body

7 0
2 years ago
Three main levels of neural integration operate in the somatosensory system. Which level involves the spinal cord?
aksik [14]
The Circuit-Level involves the spinal cord.
8 0
2 years ago
Si se aparean especies diferentes como por ejemplo el cruce entre caballos y burros; podemos afirmar que si llegan a tener desce
White raven [17]

Answer:

El híbrido va a ser esteril.

Explanation:

En la cruza entre dos especies distintas, cuando ocurre, existen distintos mecanismos de aislamiento reproductivo, que son barreras que inhiben o interrumpen el flujo génico entre especies distintas. Es decir que no habrá exito reproductivo de estas cruzas. Se trata de caracteres biológicos propios de cada especie que previenen la reproducción con otras especies.

Estos mecanismos de aislamiento reproductivo pueden ser precigóticos o postcigóticos.  

  1.Pre-copulatorios o pre-cigóticos:

  • Ecológico o por aislamiento de hábitat;
  • Estacional o temporal;
  • Sexual o etológico;
  • Mecánico;
  • Por incompatibilidad de gametas.  

  2. Post-copulatorios o cigóticos:

  • Inviabilidad del híbrido;
  • Esterilidad del híbrido;
  • Híbrido con viabilidad o fertilidad disminuido;
  • Interacciones citoplasmáticas.

La mula es producto de la cruza entre dos especies distintas: una yegua (Equus ferus caballus) y un burro (Equus africanus asinus). Es un ejemplo de la accion de mecanismo poscigótico, en el cual se forma un híbrido viable esteril. Este ejemplar puede nacer, crecer y sobrevivir, pero que no puede producir gametas funcionales, por lo cual no puede reproducirse.  

7 0
2 years ago
cross a mom with no hitchhicker thumbs with a dad with hitch hiker thumbs complete the punnet square and detirmine the genetype
dimaraw [331]

no  asria decir la rsepuset al siobntoe

3 0
3 years ago
Carrie's parents have brown hair. however, carrie gets genes for blond hair from both of her parents, and as a result she has bl
Sidana [21]
She received the recessive allele.
5 0
2 years ago
Read 2 more answers
Other questions:
  • Passive movement of water and solutes from the plasma to the capsular space of kidney corpuscles is a process known as _________
    9·1 answer
  • What is a condition in which the neuron membrane is more positive on the outside?
    14·1 answer
  • 4. Suppose you knew the makeup of specific proteins in a cell. How would you determine the particular
    9·1 answer
  • What are phytoplankton, and how are they affected by the change in seasons?
    13·1 answer
  • What is positive feedback? What is negative feedback? Biology wise
    12·1 answer
  • Umami taste receptors are capable of detecting _________ ______ in acidic foods and substances.
    11·1 answer
  • Provide three examples of habitat protection for bats.
    14·1 answer
  • Explica el impacto del desarrollo de las técnicas moleculares en los sistemas de clasificación de los organismos.
    15·1 answer
  • Which material should you use so that the area is cool in terms of temperature?
    7·2 answers
  • What proportion of people who are infected with polio develop neurological problems?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!