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Vika [28.1K]
3 years ago
7

What did Watson and Crick’s model of DNA show?

Biology
2 answers:
mojhsa [17]3 years ago
7 0

A is most definitely the answer

sergejj [24]3 years ago
5 0
Answer
The option A is correct, becuse their model shiw tha DNA is composed of two double strand of nucleotide which are twisted around each other and run in antiparallel direction. the phisphate group and pentose sugar are present on outside, while nitrogenous base is present on inside.
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wind energy gaining support as a possible energy source for people. what is the source of the energy that generated wind?
Ivahew [28]

<u>Answer</u>: The energy source that generates wind is actually the sun.

<u>Explanation</u>: The uneven heating of the Earth's surface by the sun gives rise to differences in atmospheric pressure. Areas such as deserts will warm the air masses above much more. As air is heated, it has a lower density as it expands and thus will form a point of low atmospheric pressure. The opposite situation applies for high pressure areas.The air movement from areas of high pressure to areas of lower pressure is what we call wind.

3 0
3 years ago
The numbers listed represent the number of electrons in the first, second, and third energy levels, respectively. On this basis,
yulyashka [42]

Answer:

D

Explanation:

This is because one of its orbital shells is not filled – the one with 1 electron. This atom will, therefore, want to lose this electron – it takes less energy to do this than gain 7 electrons -- to achieve stable electron configuration. This makes this atom very reactive in a chemical reaction.  Usually orbital shells of atoms begin with an S orbital shell that is filled with 2 electrons then P (x,y,z) orbital shells filled with 6 electrons total. There are also higher energy f and d orbitals that each take a maximum 10 and 14 electrons respectively. An atom is stable if its orbitals are fully filled.  

6 0
3 years ago
________ is the main form in which carbon dioxide is carried in the blood.
V125BC [204]

Carbon dioxide is transported in the blood in three ways: (i) dissolved in solution; (ii) buffered with water as carbonic acid; (iii) bound to proteins, particularly haemoglobin. Source: https://academic.oup.com/bjaed/article/5/6/207/331369

8 0
4 years ago
Is water an abiotic or biotic factor?
nikklg [1K]

Answer:

Abiotic

Explanation: Water is not a living thing, therefore water is an abiotic factor.

3 0
3 years ago
When an experiment shows that two variable are closely related, the
SashulF [63]
I think the answer is A
Hope this helps!!!!!:)
Have a great day!!
4 0
3 years ago
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