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Jlenok [28]
3 years ago
14

Where did DDT come from?

Biology
1 answer:
laiz [17]3 years ago
8 0

Answer:

Originally developed as an insecticide, it became infamous for its environmental impacts. DDT was first synthesized in 1874 by the Austrian chemist Othmar Zeidler. DDT's insecticidal action was discovered by the Swiss chemist Paul Hermann Müller in 1939.

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Me ayudan...<br> Necesito un mini ensayo de moleculares?
tatuchka [14]
Claro que yo no sabo como Hacer eso
4 0
3 years ago
In pea plants, purple flower color, C, is dominant to white flower color, c. The table shows the frequencies of the dominant and
GuDViN [60]

Answer:

Generation 1: p= 0.60 q= 0.40

Explanation:

Due to technical problems, you will find the complete answer and explanation in the attached file

Download pdf
5 0
3 years ago
What is so special about nitrogen in the atmosphere
HACTEHA [7]

Answer:

Firstly, the partial pressure of nitrogen (78%) is crucial to breathing purposes. Without this pressure, the lungs will burst and animals cannot survive.

Secondly, nitrogen is required for the formation of amino acids (building blocks of proteins) and other organic compounds that are necessary for the survival of living organisms. Principally, in the atmosphere, nitrogen is present in the form of molecular nitrogen (N2). N2 is fixed by nitrogen-fixing bacteria that form nitrates and nitrites. These molecules are then used in biochemical processes to produce proteins (amino acids) and other organic compounds. In the absence of nitrogen, these processes could become seize of limited significantly thus affecting life overall.

Thirdly, nitrogen and its derivatives act as greenhouse gases that maintain the Earth's temperature within a range that supports life. Yes, the increased abundance of nitrous oxides is not good because of acid rain and other issues, however, still, the presence of nitrogen is important for life on this planet.

5 0
4 years ago
An astronomical unit is _____.
harina [27]
1. Distance from the Earth to the Sun
2. Hurt your hand from the reaction force (Newton's 3rd law is every action has an equal and opposite reaction)
3. The Earth to rotate slightly slower (I think)
Hope this helps :)
7 0
3 years ago
Read 2 more answers
A mother, 13 years of age, delivers a low-birth-weight neonate. The neonate is transferred to the neonatal intensive care unit.
Natalka [10]

Answer:

The excessive alcohol consumption of the mother.

Explanation:

Alcohol consumption during pregnancy harms the developing baby, the foetus. This is because alcohol passes from the mother's blood to the baby's blood and this affects the growth of the baby's cell.

This causes severe damage to the cells of the brain and the spinal cord.

FASD - Fetal Alcohol Spectrums Disorder is characterised by growth and developmental problems and it can range from mild to severe.

Example is the baby having small head, narrow eye and behavioural problems later in life.

7 0
3 years ago
Read 2 more answers
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