Top answers

What are the risks and benefits concerning genetic modification of crops?

With the world population increasing exponentially, the concept of genetic engineering can be viewed as a sustainable way to feed people. Crops can be genetically modified to improve certain characteristics ...
AA
Answered by Alyssa A. • Biology tutor
5301 Views

Why are the lungs adapted for the rapid absorption of oxygen into the blood?

Oxygen is absorped into the blood by the process of diffusion. A large surface area, short diffusion pathway (the distance the oxygen has to travel through) and large concentration gradient increases the rat...
CP
9617 Views

The drug Atropine blocks the action of of acetylcholine on structures innervated by post-ganglionic cholinergic neurones.

State precisely which part of the nervous system will be affected by atropine and suggest why atropine might be used during anesthesia. Answer: It acts on the parasympathetic branch of the autonomic nervous ...
RM
Answered by Rana M. • Biology tutor
4803 Views

Explain the adaptations of cacti to their environment

Extensive root systems allow for maximum uptake of available water from the ground. Low surface area to volume ratio reduces the rate of evapotranspiration, alongside a thick waxy cuticle covering the surfac...
LB
Answered by Lewis B. • Biology tutor
8885 Views

What is osmosis? (GCSE question)

Osmosis is the movement of water from an area of high concentration to an area of low concentration across a semi-permeable membrane. A semi-permeable membrane acts like a barrier that allows only small mole...
AT
Answered by Arabella T. • Biology tutor
7247 Views