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Neporo4naja [7]
3 years ago
9

Which of the following invented the polymerase chain reaction (PCR) that allowed scientists to enlarge and study genetic materia

l?
Charles Darwin
Kary Mullis
Marshall Nirenburg
Nettie Stevens
Biology
1 answer:
ioda3 years ago
3 0
The correct answer for this question would be the second option. The one who invented he polymerase chain reaction (PCR) that allowed scientists to enlarge and study genetic material is Kary Mullis. PCR is <span> a technique that amplifies specific DNA sequences from very small amounts of </span>genetic material<span>. Mullis invented this while he is at Cetus. </span>
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A nurse is caring for a client with the diagnosis of schizophrenia. during assessment the nurse identifies both positive (type i
aleksandr82 [10.1K]
There is no options to select
3 0
3 years ago
Which derived character is shared by lizards and wolves but not frogs? A. jaw bones B. four-legged locomotion C. amniotic eggs D
VMariaS [17]

A. jaw bones

let me know if i was correct

3 0
3 years ago
Need help with this evolution chart some I've filled in yet I'm not sure if they are correct.Plz help anybody
Svetllana [295]

Answer:

This is correct. The remaining portion:

Sympatric species that form interrelationships undergo coevolution.

Allopatric species in different environments can undergo convergent evolution.

Allopatric species in small populations and under intense environmental conditions can undergo genetic drift.

Explanation:

On the basis of geographical distance, speciation is of two major types:

  1. Sympatric
  2. Allopatric

Sympatric Speciation:

Sympatric speciation is the formation of new species with no gergraphical separation from the ancestor. The new and parent species both exist in the same environment but do not interbreed due to mechanisms of reproductive isolation. These involves both prezygotic and post zygotic barriers to reproduction such as timing of mating, sensitivity to pheromones, choice of mating sites or infertility and mismatched gametes. Species formed through sympatric speciation can form interrelationships and undergo coevolution i.e. the evolution of ones species is dependent on the other.  

Allopatric Speciation:

It involves the geographical separation of the parent and new species. These species could be geographically separated by a river, mountain range or land mass.

Although, allopatric species evolve independently, they may develop similar characteristics that serve different functions. Allopatric species in radically different environments undergo convergent evolution i.e. species evolve similar characteristics without any ancestral homology.

Allopatric species that reside in small populations and are under harsh environmental pressures undergo a rapid genetic revolution i.e. genetic drift. This includes the Founder's and bottleneck effect that involve the continuation of a species from very few individuals after a drastic, sudden environmental change.

4 0
3 years ago
Identify the stage of mitosis where the chromatids line up on the equator of the cell
jok3333 [9.3K]
The stages of mitosis are:
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase<span>

Prophase
This is when the </span><span>centrioles separate and move to opposing sides of the cell.

Metaphase
This is when the chromosomes line up in the center of the cell and become connected.

Anaphase
This is when the</span><span> "sister" chromatids separate into individual chromosomes and are pulled apart.

Telophase
This is the last phase of mitosis, when chromosomes gather at opposite ends of the cell and new nuclear membranes form.

The answer is metaphase, because that is when the chromatids line up in the center of the cell.

Answer:
Metaphase</span>
4 0
3 years ago
Injury to cervical vertebra c 3-c 4 is particularly problematic because ________.
meriva

Injury to cervical vertebra c 3-c 4 is particularly problematic because C) the phrenic nerve that serves the diaphragm receives its fibers from here.

  • The top portion of the spinal cord, which is made up of the seven cervical vertebrae (C-1 to C-7) in the neck, is located in the cervical region of the spine.
  • Cervical spinal cord injuries are often the most serious kind of spinal cord injury because they affect a bigger area of the body and are closer to the brain.
  • Tetraplegia or quadriplegia, which means there is little to no feeling or movement below the shoulders or neck, will develop from a cervical injury.
  • The cervical spine's middle segment is made up of the C3, C4, and C5 vertebrae. Injuries to the cervical vertebrae C3–C5 are frequently severe because they inflict more harm to the central nervous system.

learn more about cervical vertebra here: brainly.com/question/20840479

#SPJ1

4 0
2 years ago
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