People that are lactose intolerant their body does not produce enough of the enzyme lactase
1) true
2) false

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

The fauces connects which of th following structures to the oropharynx

Which best describes how the common cold spreads in the human body? a bacteria burst out of normal cells killing them b viruses replicate inside respiratory cells c bacteria inject dna into normal cells d viruses insert dna into bacteria