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dalvyx [7]
3 years ago
13

What are the distinguishing characteristics of a cell undergoing mitosis during the late stages of prophase?

Biology
1 answer:
Scorpion4ik [409]3 years ago
3 0
Chromosome become visable, they are nearing equator of cell, spindle fibres begin appearing
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Choose the correct order of steps for the synthesis of Vitamin D.
n200080 [17]

Answer:

The correct answer will be option-

1. UV light strikes the skin and converts a steroid molecule into an inactive form of vitamin D.

2. Inactive vitamin D is transported to the liver where it is modified.

3. Vitamin D is activated under the influence of PTH.

4. Inactive, chemically altered vitamin D is transported to the kidneys.

Explanation:

Vitamin D is a fat-soluble metabolite which helps maintain the health of the bone by maintaining the calcium homeostasis.

The vitamin D is synthesized mainly in the liver and kidney from the biologically inactive precursor of vitamin D called ergocalciferol and Cholecalciferol.

The inactive vitamin is synthesized in the skin when the skin is exposed to UV rays.  The UV rays convert the 7-dehydrocholesterol, a steroid molecule to Vitamin D3, This inactive vitamin is then transported to the liver where it is converted to 25-hydroxyvitamin D.

This vitamin D form is further metabolized in the kidney controlled and regulated by the Parathyroid glands.

4 0
3 years ago
Que pasaría si los organismos existentes en el mundo no murieran​
Scrat [10]
Respuesta: Habría una sobrepoblación, y al haber tantos individuos se acarrearía una escasez de alimentos y de espacio. También podría ser que ya no podrían nacer más especies, ya que no habría materia utilizable para poder crecer.
6 0
3 years ago
Please help these 3 question, no one ever answeres my questions fully, people are just trying to get points and i need help!! is
devlian [24]
1. Climate change raises the temperature of seawater, which interferes with coral's symbiotic relationship with algae
2. The first option seem like a good answer
3. the second option

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6 0
3 years ago
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Why do you think there are earthquakes in mid-America where there are no known fault lines?
matrenka [14]
Earthquakes are mainly known to occur at plate boundaries where plates converge, diverge or slide past each other. Earthquake activity sometimes accompany volcanic eruptions but these too are concentrated around some plate boundaries (convergent, divergent). 

Smaller earthquakes are known to occur in intra-plate regions, away from margins. These occur simply because of stresses being built up in rocks. The crust is solid and rigid and it floats on the mantle which is a curved surface like the crust. 
7 0
3 years ago
Which of the following represents the correct pathway of the egg after leaving the ovary and entering the uterine tube?
Hoochie [10]

<u>Answer</u>: Infundibulum, ampulla, isthmus, uterus.

<u>Explanation</u>:

  • The ovary produces the egg and, it releases one unfertilized egg every month.
  • The egg then travels through the fallopian tube to the uterus.
  • The fallopian tube consists of three parts:

1. <em>Infundibulum</em>- it is the most distal portion of the fallopian tube which receives the egg coming out of the ovary.

2. <em>Ampulla</em>- This is the next portion of the fallopian tube which is ciliated and is the site of fertilisation of the egg.

3. <em>Isthmus</em>- it is also a ciliated region which controls the transport of both sperm and the embryo.

  • Finally, after passing through the isthmus the fertilized egg reaches the uterus where implantation takes place.
  • <em>So the journey of the egg from the ovary to uterus follows the pathway, ovary---> infundibulum--->ampulla--->isthmus--->uterus.</em>

<em></em>

8 0
3 years ago
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