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What is the difference between the verbs saber and estar?

Ser is used for: -descriptions: Yo soy Maria, I am Maria -occupations: Mi padre es abogado, My dad is a lawyer -characteristics: El es inteligente, He is intelligent -time: Hoy es martes, Today is Tuesday -o...
MR
Answered by Maria R. • Spanish tutor
2261 Views

Practice exam question AS History, how would we structure an answer: How far do you agree that Stalin's position as General Secretary was the most significant factor in the defeat of his political opponents in the years 1924- 29?

Plan: Look at how we would structure the answer to this question through the PEE essay structure. What argument could we give to agree with this question, how would we disagree, what alternative factors are ...
ED
Answered by Elizabeth D. • History tutor
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What are the names given to the body's first and second line of defence against disease? Name an example for each and how it works to prevent disease.

The first line of defence is passive immunity. An example is the skin and its job is to prevent a pathogen entering the body in the first place. Pathogens cannot penetrate the skin. The second line of defenc...
EP
Answered by Eric P. • Biology tutor
7094 Views

Describe transcription and translation.

Transcription is the making mRNA from DNA. Translation is using the mRNA to code for a protein.
CB
Answered by Clemmie B. • Biology tutor
3002 Views

Describe the path of electrical activity through the heart, starting at the sino-atrial node.

The electrical activity is initiated by the pacemaker of the heart, the sino-atrial node at the top of the left atrium. This spreads across the atria before reaching the atrio-ventricular node. Here there is...
MB
Answered by Marcus B. • Biology tutor
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