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
g100num [7]
3 years ago
5

Investigator Benton uses several methods to analyze hair samples found at the crime scene. He examines the physical features of

the hairs, their color and shape, as well as
the medulla of the hairs. Using the hair root, he tests for nuclear DNA and also for mitochondrial DNA. Which of these tests would most likely indicate the owner's identity?
Morphology
Medulla
Biology
1 answer:
Diano4ka-milaya [45]3 years ago
6 0

Answer:

Medulla.

By analyzing the DNA extracted from the hair follicle, the medullary index and the pattern of medulla in the hair samples obtained from a crime scene, an investigator can identify the owner.

Explanation:

The hair consists of follicle and shaft. The follicle is the part of the skin, where the hair grows and the hair shaft has three layers: an inner medulla,  a cortex, and an outer cuticle.

The morphology (physical characteristics) of hair provides a broad detail on the racial background of  an individual and an investigator can identify a  group of people who share similar  traits. But the hair without follicle cells attached to it, cannot  be used to identify a specific individual. If the follicle of a hair is present, then it can lead to individual identification by DNA analysis. Also the medulla of animals is larger than that in the humans. By comparing the medullary index (the ratio of the diameter of the medulla to the diameter of the entire  hair), it can be determined if the hair obtained from crime scene belongs to animals or humans. The macroscopic (length, color, and curliness) and  microscopic characteristics ( pattern of the medulla, pigmentation of  the cortex, and types of scales on the cuticle) of the hair samples are studied during a crime investigation. If the entire hair follicle (follicular tag) is present in the hair samples found at the crime scene, the blood and tissue attached to  the follicle is extracted and analyzed using DNA profiling. DNA analysis of the hair follicle provides  an identification with greater accuracy than the hair shaft.

You might be interested in
What environmental condition contributed to the heat wave experienced in Europe and the thousands of deaths in France?
SIZIF [17.4K]
The correct answer for this question would be option C. The environmental <span>condition that contributed to the heat wave experienced in Europe and the thousands of deaths in France is air pollution. A heat wave is when there is a prolonged period of abnormally hot weather. In this case, air pollution, having chemicals present in the air, contributed and worsen the heat wave. Hope this helps.</span>
3 0
2 years ago
Read 2 more answers
An eccentric millionaire botanist has offered a $25,000 scholarship to anyone who can successfully get a plant to grow through a
mars1129 [50]

Answer:

Option B, Apply auxin directly to the lower part of the stem opposite from the direction you want the stem to bend.

Explanation:

Options for the question are

A) Apply auxin directly to the shoot tip on the side to which you want the tip to bend.

B) Apply auxin directly to the lower part of the stem opposite from the direction you want the stem to bend.

C) Inject compounds that block auxin receptors into the part of the stem opposite from the direction you want the stem to bend.

D) Plant the roots in two different pots, and apply auxin to the root bucket that is on the same side as the direction you want the plant to bend.

Solution

Auxin is responsible for stem elongation by inhibiting growth of lateral buds. The movement of auxin is opposite to the direction of elongation of cells. Generally, Auxin moves to the dark side which is opposite to the direction i.e the lighter side in which cell elongate . Due to this growth pattern, the stem tip gets curved towards the light.  

Hence, option B is correct

4 0
3 years ago
What is a comparison of the actual use of renewable, sustainable resources, including water and land, that a population uses for
timofeeve [1]

Answer:

Right here

Explanation:

The renewable resource can be used over and over and replaced very fast to human standers. Nonrenewable resources cannot be made fast enough by human standards.

3 0
2 years ago
Why does organisms disappear overtime?
xz_007 [3.2K]
Extinction is a natural process that may be caused by natural selection, shortage of food or natural calamities. Hunting, deforestation, pollution, the conversion of uncultivated areas into pastures, the illicit trade of wild animals as well as climatic changes have made life more difficult for many animals.
4 0
3 years ago
Read 2 more answers
Which part of the eye contain receptor cells?
Bess [88]

retina

hope its helps

have a good day

6 0
2 years ago
Other questions:
  • What important function do the coronary arteries have?
    9·1 answer
  • 15. The most important element necessary for life that makes up EVERY macromolecule is
    9·1 answer
  • 5. Challenge: A chemical equation is balanced when each side of the equation includes the same number of each type of atom.
    9·1 answer
  • The Human Body is made up over
    11·2 answers
  • When a skydiver jumps out of an airplane, there are two forces acting on
    11·1 answer
  • Can youuuuu help me plsss
    14·2 answers
  • Explain the main differences between a petrol and a diesel engine
    8·1 answer
  • What's the role of ATP in the muscle cell?
    13·1 answer
  • #4 <br> The right side of the heart pumps blood only to the ____________ .
    8·2 answers
  • Identify the picture below in which the sunlight is the most direct.
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!