What is one advantage of their use as a green agricultural practice compared with conventional agricultural practices?
a. it prevents water pollution.
b. it prevents air pollution.
c. it prevents soil erosion.
d. it protects endangered species.
Answer:
A. It prevents water pollution
Explanation:
Conventional methods of agricultural pest control involves the use of pesticides. These pesticides are usually chemicals which are harmful to the organisms involved. However, since these chemicals are not easily degraded, they enter the runoff when rain falls, flowing into nearby streams and rivers, thereby polluting them.
However, with natural pest control methods like the use of ladybirds to destroy aphids, there would be no need for chemicals which will eventually pollute any nearby water environment.
Friedrich Miescher
James Watson
Maurice Wilkins
Rosalind Franklin
The scientists A(Francis Crick) C(James Watson) concluded that DNA is a three-dimensional molecule.
Deoxyribonucleic acid is a polymer composed of two polynucleotide chains that coil around each other to form a double helix. The polymer carries genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. DNA and ribonucleic acid are nucleic acids.
Moreover, deoxyribonucleic acid (DNA) is a molecule that contains the biological instructions that make each species unique. DNA, along with the instructions it contains, is passed from adult organisms to their offspring during reproduction.
Therefore, DNA is made up of a chain of molecules called Nucleotides. Each nucleotide contains a nitrogen base, a sugar group and a phosphate group. Four possible nitrogen bases can be present in DNA; Adenine (A), Thymine (T), Guanine (G) and Cytosine (C). Human DNA contains billions of DNA bases.
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Answer:
A(Francis Crick) C(James Watson)
Explanation:
B. rusting and cutting
C. burning and digesting
D. boiling and melting
Hello, the correct answer to your question is, D. boiling and melting
I hope this helped!
An olympic bronze medal is given to an athlete who achieves third position in any sports. An olympic bronze medal is made up of 3 elements; copper, zinc and tin.
Olympic Games are the world's foremost sports competition. There are three classes of medal to be won by an athlete in a sports. These include gold, silver, and bronze, awarded to first, second, and third positions, respectively.
The bronze medals are presented to the second runner-up of the sports. These are made of copper, zinc, tin, and a very small amount of silver. In Olympic Games, each bronze medal contained 1% silver element and the remaining 99% was made from coinage bronze element. Bronze coinage is made up of 97% copper, 2.5% zinc, and 0.5% tin.
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Answer:
3 atoms
Explanation:
Copper atom, zinc atom and tin atom