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Likurg_2 [28]
2 years ago
15

One of the distinguishing characteristics of nervous tissue is how difficult it is to repair damage to nervous tissue. Explain f

actors limit neurogenesis in the CNS of adults, why is it so hard to repair a damaged nerve
Biology
1 answer:
Scilla [17]2 years ago
4 0

Answer:

Inhibitory influences from neuroglia, and the absence of growth-stimulating cues.

Explanation:

Neurogenesis in adults is limited by Inhibitory influences from neuroglia, mainly from oligodendrocytes, and the absence of growth-stimulating cues that are present during fetal development. It is so hard to repair a damaged nerve because nerve cell like other cells can't divide and increase in number, they can't renew themselves. Due to no division, the nerve cells does not increase in number and therefore can't repair themselves.

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Which structure in the cheek cell did you observe that separates and protects the cell from the environment?
stellarik [79]
The answer is epithelium. In particular, stratified squamous epithelium. Epithelium is protective tissue that is found on<span> the outer surfaces of </span>organs and  blood vessels<span> and </span><span>inner surfaces of </span>cavities<span> in many internal organs. Epithelium contains no blood vessels, and nutrients reach the epithelial cells through diffusion from the underlying tissue.</span>
5 0
3 years ago
Measurements of the amount of DNA per nucleus were taken on a large number of cells from a growing fungus. The measured DNA leve
erica [24]

Answer:

Option C

Explanation:

In G2 phase (third phase of interphase) of cell division, following the S phase. It is during the S phase of the cell division during which the DNA of the cell replicates. Hence, in the G2 has double the DNA range as compared to the DNA range in prior stages of interphase. Also, in G2 phase cell grows and protein synthesize

Option C is correct

3 0
3 years ago
Read 2 more answers
Define independent assortment within the framework of meiosis. What impact does homologous recombination have on the principle o
Paul [167]

Answer:

The law of independent assortment states that the different genes get separated independently of each other and gets assorted into gametes to produce different combination of genes.

It was formulates by famous scientist G. Mendel based on his work on peas.

For example, in a traditional dihybrid cross of true breeding round and yellow seed plant with wrinkled and green seed plant, F2 generation show four different combinations of phenotype:

  • round and yellow
  • round and green
  • wrinkled and yellow
  • wrinkled and green

It shows that genes for round and yellow were independently inherited and genes for wrinkled and green were independently inherited. Else, new combinations could not be observed.

Homologous recombination is an event that takes place in prophase I during meiosis. The genetic material is exchanged between the non-sister chromtids of homologous chromosomes. It adds into the genetic variation within a population by producing more combination of genes in the gametes.

It does not violate the law of independent assortment as the genes were independently assorted. It only helps in producing more combinations of genes.

6 0
3 years ago
What are the answers to these questions? Thanks
Shalnov [3]
For some reason I can’t see the picture
4 0
3 years ago
Peter conducted the investigation below to find the energy contained in a peanut. If the burning peanut raised 20 g of water fro
neonofarm [45]

Answer:

334.48

Explanation:

delta T = 4 degrees

m = 20 grams of water

c = 4.181 J / gram

E = 20 * 4.181 * 4

E = 334.48 Joules

Remember to change c to Joules / gram

4181 j / kg * 1 kg / 1000 grams = 4.181 j / gram

5 0
3 years ago
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