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Airida [17]
1 year ago
11

What essential information does the product of the bicoid gene in Drosophila provide during development? (A) orientation of the

dorsal-ventral axis (B) orientation of the left-right axis (C) segmentation
(D) orientation of the anterior-posterior axis
Biology
1 answer:
solmaris [256]1 year ago
5 0

The essential information the product of the bicoid gene in Drosophila provides during development is (D) orientation of the anterior-posterior axis.

Bicoid is the maternal gene that acts as a morphogen. It expresses itself on the basis of its concentration gradient. The concentration of bicoid is high towards the anterior region, hence the region where bicoid protein is expressed les is the posterior portion.

Drosophila is the fruit fly commonly found in the households. It is one of the most studied model organism in developmental biology. This is because it can reproduce rapidly, has a relatively simple structure and is cost-effective.

To know more about bicoid, here

brainly.com/question/13063204

#SPJ4

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What are developmental homologies, and how are they studied?
7nadin3 [17]

Explanation:

In reference to evolution, homology can be described as the comparative similarities in the structures of organisms that make it more alike to one organism than the other organisms. It also shows the characteristics that might have evolved in an organism over time. Developmental homology are the similarities which arise between organisms due to similar embryological source.

Developmental studies can be made by researching the embryological developments of different organisms and looking for similarities among them.

For example, studying the snake embryos showed that some of the embryos have hind limb buds in them which disappeared in the mature snake. This study made it clear that snakes evolved from organisms that had hind limbs. As the snakes do not need the limbs, so with time the species of snakes evolved and lost their hind limbs.

5 0
3 years ago
If the first trophic level in an energy pyramid receives 1,000 units of energy from the Sun, how much energy is available for th
yanalaym [24]

Answer:

10 units

Explanation:

Energy is transferred from organism to organism in an ecosystem when they feed on one another. However, based on the pyramid of energy, only about 10% of energy is transferred from one organism to another because a bulk of energy (about 90%) has been lost to metabolic activities.

Energy moves from producers to consumers, each occupying trophic levels. If the first trophic level in an energy pyramid receives 1,000 units of energy from the sun,

- 10% of 1000units will be available for the second trophic level i.e. 10/100 × 1000 = 100units

- 10% of 100units will be available for the third trophic level i.e. 10/100 × 100 = 10units

Hence, 10units of energy is available for the third trophic level.

8 0
2 years ago
A child presents with bone deficiency and a bowlegged appearance. This assessment data supports a diagnosis of Rickets
frozen [14]

A child presents with bone deficiency and a bowlegged appearance. This assessment data supports a diagnosis of:

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Answer:

a) Rickets

Explanation:

Rickets occurs at the early stage of childhood due to inadequate vitamin D.

Vitamin D provides the body with higher absorption rate of calcium and phosphorus, inadequate intake of Vitamin D results into low calcium and phosphorus levels in the bones, as a result, rickets sets in.

Rickets is a disarrangement of impaired mineralization of cartilaginous growth plates in children. It can also result from lack of exposure to sunlight.

8 0
3 years ago
What is a "True Mineral"?
Tatiana [17]

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7 0
2 years ago
The pressure differences that make wind happen are caused by what?
Effectus [21]
By the unequal heating of earths surface 
8 0
3 years ago
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