Answer:
The statement is true
Explanation
the statement is wrong because the structure of DNA was discovered in 1953 by James Watson and Francis Crick and they explained it very well. till 1985 everything about the structure of DNA was very well known and the scientist knew that the DNA of each person differs from each other.
Our environment is what houses and helps our ecosystem grow and thrive. Without protecting and taking care of our environment we're putting so many lives at danger such as animals, plants and crops, and even our own. All of the ecosystems that make up our environment are deeply connected.
Answer:
D. A positive charge, because of a covalent bond with oxygen
Explanation:
A water molecule contain both hydrogen and oxygen atom. Water is a polar molecule because it has positive electric charge in one of it's poles and negative charge on the other. The hydrogen is positively charged and the oxygen is negatively charged which are bonded by covalent bond. Hydrogen is positively charged because it cannot attract electrons strongly like oxygen which is positively charged. There is unequal sharing of electrons in water molecules and this is why oxygen is slightly negative and hydrogen is slightly positive.
