Table of Contents
IGCSE Biology: Homework Questions #
Question 1 #
What is the main source of energy for biological systems?
Question 2 #
Draw a food chain with organisms, indicate the trophic level on each one
Question 3 #
Define a food chain and food web
Question 4 #
What is a target organ (hormones)?
Question 5 #
Suggest a situation in which the secretion of adrenaline is increased
Question 6 #
Explain how adrenaline prepares the body for action
Question 7 #
State any 4 ways in which the endocrine system is different from the nervous system
