Quelpr
5 marksHomeostasis and Hormonal Action

CAPE Biology Unit 2 · 2009 · Paper 2 · Question 5(a)(i)

Explain how hormones contribute to the maintenance of a fairly constant internal environment in animals despite external environmental changes.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 5(a)(ii)Suggest TWO other ways in which ethene plays a regulatory role in plants besides speeding up the ripening of fruits.[2 marks]
  2. 5(b)(i)Distinguish between 'ultra-filtration' and 'selective re-absorption' in relation to urine formation.[2 marks]
  3. 5(b)(ii)With reference to THREE structural features, discuss how the proximal convoluted tubule is ideally suited to the function of selective re-absorption.[6 marks]

More practice: the rest of this paper · more Homeostasis and Hormonal Action questions · all CAPE Biology Unit 2 past papers