Search our library of homework questions

Top answers

All subjects

All levels

What type of blood does the pulmonary artery contain?

Deoxygenated blood

Answered by Kirushanth S. • Biology tutor

2383 Views

An extract of DNA contains 4000 base pairs. The extract is identified to contain 300 guanine bases. How many adenine bases can be found in the DNA extract?.

3700

Answered by Kirushanth S. • Biology tutor

2282 Views

Explain how the physical properties of water enable organisms to survive over a range of temperatures.

Water has a very high specific heat capacity due to the collective forces of the many hydrogen bonds. A lot of energy goes into breaking these bonds rather than raising the temperature of the water, hence...

Answered by Arunima B. • Biology tutor

22874 Views

What are the 2 methods used to manufacture ethanol? What are the advantages and disadvantages of both?

The hydration of ethene: Ethene and steam are passed over a catalyst - concentrated phosphoric acid (H₃PO₄) - at 300^OC and 60-70 atmospheres. This process is fast, continu...

Answered by James P. • Chemistry tutor

9006 Views

How is the the small intestine adapted for absorption?

The Ileum is long (up to 7m!) and has a very high surface area due to the presence of many villi and microvilli. A single villus is made up of many cells, each with lots ...

Answered by James P. • Biology tutor

25172 Views