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emmainna [20.7K]
2 years ago
13

When the Bicoid protein is expressed in Drosophila, divisions between cells in the embryo are not yet fully developed. This info

rmation helps to explain which observation by Nüsslein-Volhard and Wieschaus?
(A) mRNA from the egg is translated into the Bicoid protein. (B) Bicoid protein diffuses throughout the embryo in a concentration gradient.
(C) Bicoid protein serves as a transcription regulator. (D) Bicoid protein determines the dorso-ventral axis of the embryo.
Biology
1 answer:
AleksAgata [21]2 years ago
7 0

When the Bicoid protein is expressed in Drosophila, divisions between cells in the embryo are not yet fully developed. This helps to explain that (B) Bicoid protein diffuses throughout the embryo in a concentration gradient.

Bicoid protein acts as a morphogen. This means it shows its effect when the concentration gradient is high. Also abbreviated as Bcd, the protein helps in establishing the anterior and posterior region of the Drosophila. It also represses the translation of caudal mRNA.

Embryo is the initial stage of a microorganism, right after the fertilization. In vertebrates, this stage does not last much longer because the development of organs begins.

To know more about bicoid protein, here

brainly.com/question/13063204

#SPJ4

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Match the staining techniques with their purpose.
Dennis_Churaev [7]

A Negative stain such as India ink or Congo red-Look for the presence of a capsule.

This stain method is usually used to stain the area around the microorganism.

B The Gram stain-Divide bacteria into two groups based on cell wall structure (thick vs. thin).  

This is type of differential staining used to distinguish organisms based on their staining properties. Gram + and Gram- bacteria stain different because of different cell wall structure.

C The Ziehl-Neelsen Acid-fast stain- Identify bacteria with waxy cell walls such as: Mycobacterium tuberculosis (the cause of TB).  

This is also differential staining method which uses heat and phenol to derive dye into the cells with lipid-rich walls.

D Simple stain with a basic dye-Stain microbes a bright color to make it easier to see them in bright field microscopy.

One dye is used in simple staining in order to determinate the size, shape and arrangement of the cells.

E The Schaeffer-Fulton Endospore stain-Identify Bacillus or Clostridium species, such as the causative agents of anthrax, botulism, tetanus and gangrene.  

This is a special type of staining only used for the bacteria that can form endospores. Bacteria are first treated with heat and then with malachite green, which is very strong stain that can penetrate endospores.

5 0
4 years ago
3. Which of the following electromagnetic waves has the least energy on the
forsale [732]
Radio waves has the least energy
4 0
3 years ago
Why virus, virions, prions have no place in five kingdom classification​
Ainat [17]

Hey, there!!

There is no place for virus, virions, prions in kungdom classification. The reason is they show both living and non living characters, which don't define them whether they are living beings or non living things.

As in 5 kingdoms, the only living organisms are classified.

  • Kingdom Monera mostly deals with the organism which contains prokaryotic cells.
  • Kingdom Protista deals with the organism which have eukaryotic cells.
  • Kingdom Fungi deals with various fungal organism.
  • Kingdom Plantae deals with various type of plants.
  • Kingdom Animalia deals with various type of animals.

So, you can see that there is non of the kingdoms which deals with the organism which have similar characteristics like viruses, virions and prions.

<em><u>Hope</u></em><em><u> </u></em><em><u>it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

7 0
4 years ago
A model of a gene, DNA, and a chromosome is shown here. A researcher tags the gene with a heavy radioactive isotope (P-32). Whic
adoni [48]

Answer:

The gene will be radiolabeled, but only a portion of the chromosome will display P-32 because genes are smaller than chromosomes

Explanation:

Genes are made of DNA, but there are many (numerous) genes found along chromosomes. Only a small portion of the chromosome will be radiolabeled.

7 0
3 years ago
What is the cisterna chyli
lana [24]

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the cisterna chyli is the dilated origin of the thoracic duct, which receives the right and left lumber lymphatic trunks and the intestinal lymphatic trunk.

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