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adell [148]
2 years ago
5

which layer of the dermis contains the capillaries, lymphatic vessels, and sensory nerve fibers that supply the epidermis?

Biology
1 answer:
allochka39001 [22]2 years ago
4 0

Answer:

Papillary Layer

Explanation:

In addition, the papillary layer contains phagocytes, defensive cells that help fight bacteria or other infections that have breached the skin. This layer also contains lymphatic capillaries, nerve fibers, and touch receptors called the Meissner corpuscles.

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True of False: Hemoglobin releases the same amount of oxygen to all the tissues regardless of variations in their metabolic rate
Murljashka [212]

Answer: False

Explanation:

Hemoglobin can be defined as red protein that transports oxygen to various parts of the body according to its need.

It does not transports the same amount of oxygen to all the tissues. Some tissues of the body might require more more oxygen and some cells might require less amount of oxygen.

It depends on the state of activity. It transports more oxygen to the tissue that require it the most.

Example: The skeletal muscles of the body require more oxygen and it can be more than 80% .

Hence, the given statement is false and hemoglobin does not releases the same amount of oxygen to each and every tissue of the body.

5 0
3 years ago
What are some natural influences of the Tundra ?
grigory [225]
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7 0
3 years ago
Give 3 examples of how microorganisms might demonstrate the characteristics of life.
tester [92]

Answer and Explanation:

  1. Nutrition- microorganisms are able to feed on food materials obtained from the living or dead bodies of plants or other animals. They are therefore heterotrophs.
  2. Movement- both localized and generalized movements which results in the animal moving from one point to another. e.g., using flagella, cilia
  3. Excretion- they lack highly specialized excretory organs but some microorganisms use contractile vacuoles for excretion which removes waste.

3 0
3 years ago
What's the difference between genetic drift and change due to natural selection?
JulijaS [17]

Answer:

Genetic drift does not require the presence of variation.

Explanation:

Genetic drift is the random changes to the frequency of an allele in a given population.

Natural selection is the process whereby organisms that are well adapted to the conditions in an environment can survive and produce more offspring.

  • Genetic drift does not require variation to occur.
  • It usually occurs even when there is less to no variation.
  • Natural selection occurs when variation is very large.
  • A highly varied gene pool causes natural selection.
4 0
3 years ago
NEED HELP ASAP!!!!! 50 POINTS!!
Karolina [17]

Answer:

B.

Explanation:

B.

4 0
2 years ago
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