Search our library of homework questions

Top answers

All subjects

All levels

How do I know when to use avoir and when to use être in the passé composé - the perfect tense?

The passé composé - the perfect tense - is used for talking about completed events in the past, such as 'I bought an apple', and it is formed using an auxiliary verb the present tense and a past participl...

Answered by Isobel M. • French tutor

2388 Views

Explain how during a game of a rugby, an increase in blood Co2 will cause heart rate to rise (4 marks)

As the muscles in the body respire and use up the oxygen, Co2 is produced and thus blood acidity in the bloodstream rises
2) This change is detected by the chemoreceptors
3) These impulses...

Answered by Toby M. • Physical Education tutor

2150 Views

What is the difference between mitosis and meiosis?

Mitosis is the process used by normal body cells for everyday replication to maintain a healthy body, for example tissue regeneration. On the other hand, meiosis is the process whereby the gametes, sperm ...

Answered by Clare G. • Biology tutor

3426 Views

When is it appropriate to use the imperfect and preterite?

The preterite is generally used for an action that has been completed in the past, which has a definite beginning and end point Example:Anoche fui a la fiesta The

Answered by Maisie L. • Spanish tutor

1668 Views

Give two differences between a plant and animal cell

Answers are any 2 of the following:
1) plant cells have a cell wall whereas animal cells do not2) plant cells have vacuoles whereas animal cells do not3) plant cells have chloroplasts whereas animal ...

Answered by Sarah J. • Biology tutor

2694 Views