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RideAnS [48]
3 years ago
11

At the onset of the embryonic period, the _____ appear(s). it will eventually become the neural tube.

Biology
1 answer:
fomenos3 years ago
6 0

Answer;

Primitive streak.

At the onset of the embryonic period, the primitive streak appears. It will eventually become the neural tube.

Explanation;

The primitive streak is a transient structure which forms on day 15 of human development.

It marks the start of gastrulation; the process in which the inner cell mass in converted into the trilaminar embryonic disc.

It originates from the anterior epiblast.

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Jordan's grandmother uses the juice from squeezed lemons to remove stains from his shirt. He hypothesizes that the juice is the
ANEK [815]

Answer:

like david said just wash it lol

Explanation:

6 0
3 years ago
How does loseing laforin give you epilepsy ( please use lots of detail in the answer)
Deffense [45]
<span>Lafora disease is the most severe teenage-onset progressive epilepsy, a unique form of glycogenosis with perikaryal accumulation of an abnormal form of glycogen, and a neurodegenerative disorder exhibiting an unusual generalized organellar disintegration. The disease is caused by mutations of the EPM2A gene, which encodes two isoforms of the laforin protein tyrosine phosphatase, having alternate carboxyl termini, one localized in the cytoplasm (endoplasmic reticulum) and the other in the nucleus. To date, all documented disease mutations, including the knockout mouse model deletion, have been in the segment of the protein common to both isoforms. It is therefore not known whether dysfunction of the cytoplasmic, nuclear, or both isoforms leads to the disease. In the present work, we identify six novel mutations, one of which, c.950insT (Q319fs), is the first mutation specific to the cytoplasmic laforin isoform, implicating this isoform in disease pathogenesis. To confirm this mutation's deleterious effect on laforin, we studied the resultant protein's subcellular localization and function and show a drastic reduction in its phosphatase activity, despite maintenance of its location at the endoplasmic reticulum. 

I got my information from </span>https://www.ncbi.nlm.nih.gov/pubmed/14722920
4 0
3 years ago
Which THREE statements correctly describe the properties of water?
grandymaker [24]
<em>CORRECT STATEMENTS
> Water forms hydrogen bonds with other polar molecules. </em>
<em>> Water is a polar molecule. </em>
<em>> Water dissolves more ionic compounds.</em> 

<em />Water is a polar molecule because of its uneven distribution of electron density. It is made up of two hydrogen atoms and one positive atom.
Since water is a polar molecule, it forms hydrogen bonds with other polar molecules. Though these bonds are relatively weak, however, there are so many of them present in water. 
Water also dissolves most ionic compounds due to the fact that water is a universal solvent. When these compounds are added to water, there will be an interaction between the individual ions and the polar regions of the water molecules and disrupts the ionic bonds. 

<em>INCORRECT </em>
> Liquid water is less dense than water vapor. - Liquid water has a higher density than water vapor. The fact that water vapor rises indicates that it is less dense than water.

>Water dissolves more hydrophobic substances. - Hydrophobic substances do not dissolve easily in water. It is termed as 'hydrophobic" because it means water-fearing. 

7 0
3 years ago
In what way do the membranes of a eukaryotic cell vary?
ser-zykov [4K]

Answer:

The Answer is Letter E.

Explanation:

<em>The way membranes of a eukaryotic cell vary is certain proteins are unique to each membrane. </em>

The eukaryotic cells also contain other membrane-bound organelles such as mitochondria and the Golgi apparatus, and in addition, some cells of plants and algae contain chloroplasts. Unlike unicellular archaea and bacteria, eukaryotes may also be multicellular and include organisms consisting of many cell types forming different kinds of tissue.

7 0
3 years ago
How do environmental scientists use technology to track polar bears?
Trava [24]

Answer: A

Explanation:

Apex

3 0
3 years ago
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