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kifflom [539]
4 years ago
14

What is the primary cause of respiratory distress syndrome (rds) of the newborn?

Biology
1 answer:
zhuklara [117]4 years ago
7 0
The disease is mainly caused by a lack of a slippery substance in the lungs called surfactant. This substance helps the lungs fill with air and keeps the air sacs from deflating. Surfactant is present when the lungs are fully developed.

https://medlineplus.gov/ency/article/001563.htm
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Purple flowers are dominant over white flowers. A heterozygous purple flower is crossed with another heterozygous purple flower.
Anna007 [38]
You need to draw a punnet square:
 
  _______
__|P  | w   |
|P |PP| Pw|
|w |Pw| ww|

So that means you'll have:
1/4 PP flowers, which are homozygous purple flowers
2/4 Pw flowers, which are heterozygous purple flowers
1/4 ww flowers, which are homozygous white flowers

So the ratio of purple to white flowers is 3:1 
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4 years ago
What is a plant cell
Delicious77 [7]
A planet cell is a cell on a planet
6 0
4 years ago
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Transcription produces which of the following? Transcription produces which of the following? mRNA rRNA tRNA mRNA and tRNA mRNA
VMariaS [17]

Answer:

<h2>mRNA, tRNA, and rRNA are all produced by transcription.</h2>

Explanation:

Trascription is the process through which RNA molecules are produced from the DNA template with the help of RNA polymerase/ RNA pol holoenzyme and various other factors. One strand of  DNA works as a template, and according the the sequence in DNA, RNA synthesis occur in complementry way.

All type of RNA (mRNA, tRNA, and rRNA ) molecules are produced by transcription.

7 0
4 years ago
Which is required for the light-dependent reactions in photosynthesis to occur?
LUCKY_DIMON [66]

Answer: The correct answer is- H2O ( water).

Photosynthesis is a process by which green plants and algae prepare their own food ( using CO2 and H2O) in the presence of sunlight. It is primarily divided into two phase that is light dependent and light independent phase.

During light depednent phase ( that occurs in thylakoid membrane), solar energy is absorbed by chlorophyll and converted into chemical energy in the form of ATP and NADPH.

Water is required as splitting of water ( H2O) occurs in this phase that liberates electrons ( which are passed to reaction center chlorophyll), hydrogen ions, and oxygen atom ( which combine to form oxygen molecule).

Thus, H2O is the right answer.


3 0
3 years ago
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Which of the following could include all the others?
dedylja [7]
Most likely Selective Breeding (c)
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3 years ago
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