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Tpy6a [65]
3 years ago
12

The distinction between protostomes and deuterostomes is based on

Biology
1 answer:
polet [3.4K]3 years ago
3 0
The distinction between protostomes and deuterostomes is based on differences in their embryological development. Protostomes develop their oral end from their first developmental opening, while deuterostomes have their oral end develop from the second opening on the dorsal surface. 
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Initiation of bacterial mRNA synthesis (transcription) requires
myrzilka [38]

Answer:

Sigma factor is the name of the protein and it helps RNA polymerase to recognize promoter.

Explanation:

RNA polymerase is the enzyme which helps in the transcription of DNA duplex. In bacteria, a protein called sigma factor is present in RNA polymerase which is responsible for the initiation of transcription.

The sigma factors gives the ability to RNA polymerase to recognize the promoter sequence. If the sigma factor is not present in RNA polymerase than this enzyme can not distinguish between promotor and other sequences.

So the sigma factor increases the affinity of RNA polymerase towards promoter and helps in initiation of the transcription. Sigma factor gets released from the core enzyme when the chain reaches 8-9 bases.

5 0
3 years ago
Fetal benzodiazepine syndrome has not been medically documented. <br> a. True <br> b. False
ipn [44]

Answer- FALSE


Fetal benzodiazepine syndrome is a condition of infants which is caused by the use of benzodiazepine by the mother during pregnancy. Children with this syndrome often present with malformed face, delayed mental development and learning disabilities, poor coordination, poor muscle tone, and tremors.

5 0
3 years ago
Why was introducing foxes ineffective at quelling the rapidly-growingrabbit population
natima [27]

The introduction of foxes in order to control, or even decline, the rapidly growing rabbit population was not effective due to very simple reasons, reproduction rates and available area for living.

The rabbits are reproducing quicker than the foxes, and not just quicker, but in larger numbers with every lither, thus outnumbering the foxes by far, even if each fox manages to kill a rabbit or two each day.

The area available for the rabbits to live and spread out is huge, so they are not limited by a small amount of area where their number will have to stop to grow because of lack of food sources, thus spreading around without any problem, especially because of the lack of competition.

7 0
3 years ago
Connective tissue consists of a population of cells embedded in an extracellular matrix. What is the extracellular matrix associ
hodyreva [135]

Answer:

Fibers and the Ground Substance make the extracellular matrix...

Explanation:

Connective tissue is composed of fibers, cells and the ground substance that gave the it the overall physical appearance. Chemically, the extracellular matrix is made up of minerals, water, Proteoglycans and a large network of fibrous protiens. All of these help connective tissue to maintain the structure.

5 0
3 years ago
PLEASE HELP FAST
PolarNik [594]

Answer:

ez

Explanation:

so if you divide the 75 percent tall to 25 percent short and THEN add the 25 medium and 50 short reduce the 100% tall you get ur mom

3 0
2 years ago
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