Welcome to Westonci.ca, where you can find answers to all your questions from a community of experienced professionals. Get detailed and precise answers to your questions from a dedicated community of experts on our Q&A platform. Discover in-depth answers to your questions from a wide network of professionals on our user-friendly Q&A platform.

Chemoattractive molecules are called _____ and guide axons, while chemorepulsive molecules are called _____ and prevent axon extension in their vicinity.

a. growth cones; filopodia
b. semaphorins; netrins
c. synapses; netrins
d. netrins; semaphorins