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Tpy6a [65]
3 years ago
5

Ilana is having a baby and it is only three and a half weeks since conception. At this stage, which central nervous system struc

ture(s) will have begun to form?
Biology
1 answer:
ASHA 777 [7]3 years ago
7 0

Answer: Neural tube

Explanation: Central nervous system originates from ectoderm, neuroectoderm gives rise to neural tube, the primordia of brain and spinal cord. Neural tube is the embryonic structure, neural plate folds into neural tube is formed at the dorsal side of embryo.

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True or false: In a gel electrophoresis gel, a DNA fragment containing 100 bp (base pairs) would travel faster (and further) tha
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Answer: true

Explanation: In gel electrophoresis, the smaller the size/molecular weight of DNA the faster it moves across the gel and vise versa. This is as a result of the pore size of the gel which is usually prepared 1g of agarose in 100ml of distilled water. So a DNA fragment with 1000 base pairs will "struggle" its movement across the gel pore making it mive less faster and further. Movement and molecular weight of DNA are inversely proportional.

3 0
3 years ago
A researcher determines an organism to be eukaryotic, unicellular, and autotrophic. In which taxonomic group should this organis
Aleksandr-060686 [28]

According to the characteristics of this organism, it is classified into the Protist kingdom, which brings together unicellular or simple multicellular organisms that do not form tissues, both autotrophic and heterotrophic.

<h3>What is the kingdom protista?</h3>

It includes eukaryote-type organisms that, due to their characteristics, cannot be included in the rest of the kingdoms of this class.

Although most protists are unicellular, there are also multicellular protists and they can have autotrophic or heterotrophic metabolisms.

Therefore, we can conclude that the protist kingdom groups living beings that have cells belonging to the eukaryote group.

Learn more about Protist kingdom here: brainly.com/question/26845151

5 0
2 years ago
A dominant allele is often covered up or masked by the recessive allele. True or false?
swat32

Answer:

Explanation:In a heterozygote, the allele which masks the other is referred to as dominant, while the allele that is masked is referred to as recessive.

7 0
3 years ago
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Which animals have adapted to near-freezing water?
Naddika [18.5K]
The answer would most likely be whales
7 0
3 years ago
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The measure of how stretched out an ellipse is, is referred to as ____.
azamat

D. The measure of how stretched out an ellipse is, is referred to as <u>eccentricity.</u>

<h3>What is eccentricity of ellipse?</h3>

Eccentricity for an ellipse is the ratio of the length of the semimajor axis (a) to the distance (c )between the ellipse's center and each focus.

e = c/a

The greatest ellipse has the smallest eccentricity, whereas the perfect circle has the maximum eccentricity. The eccentricity of an ellipse e, which ranges from 0 (the limiting case of a circle) to 1 (the length of the ellipse), is used to determine how long it is (the limiting case of infinite elongation, no longer an ellipse but a parabola). Because the distance from the fixed point on the plane has a constant ratio that is less than the distance from the fixed line on the plane, the eccentricity of an ellipse ranges from 0 to 1.

Learn more about  eccentricity here:

brainly.com/question/16931917

#SPJ1

8 0
2 years ago
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